JP2005136480A - Photographing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a photographing apparatus which provides an image in focus with a principal object and out of focus with other objects, with a simple configuration, even when a focal depth is shallow. <P>SOLUTION: When a release button is depressed in a portrait mode, the photographing apparatus executes preliminary photographing attended with strobe lighting and thereafter carries out main photographing. An object distance up to an object on pixels is obtained on the basis of the lightness of each pixel obtained by the preliminary photographing. The photographing apparatus carries out image processing to blur each pixel obtained by a main photographing with a blurred amount depending on a difference between the distance up to the principal object acquired from the focal position of a photographing lens and an object distance of each pixel. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a photographing apparatus.

  As in portrait photography, a photographing technique is known in which a main subject is focused and a subject other than the main subject is blurred. The amount of defocus varies depending on the focal length of the photographic lens, the aperture diameter of the photographic lens, the distance from the position where the focus is matched, and the longer the focal length of the photographic lens, the smaller the aperture diameter of the photographic lens. The larger the distance, the greater the distance from the in-focus position, the greater the blur amount. For this reason, in the imaging method described above, an imaging lens having a relatively long focal length is used, and the aperture is opened wide to make the focal depth (depth of field) as shallow as possible.

  On the other hand, a photographing apparatus using an image sensor such as a CCD image sensor, for example, a digital camera has become widespread. In an image sensor used in a general digital camera, the exposure surface is significantly smaller than the exposure surface size of a camera using a 135 type photographic film (hereinafter referred to as a silver salt camera). For this reason, when trying to obtain the same angle of view as a silver salt camera, the focal length of the digital camera's shooting lens is shorter than the focal length of the shooting lens of the silver salt camera. The focal length is short. In addition, since a photographic lens with a large aperture diameter is large and expensive, a general digital camera often uses a photographic lens with a small aperture diameter.

  As described above, since many digital cameras use a photographing lens having a short focal length and a small aperture diameter, the depth of focus is deep and the amount of out-of-focus is not so large. Therefore, it is not suitable for shooting using a focus effect such as portrait shooting.

  A digital camera described in Patent Document 1 is known as a digital camera that improves the above problems. In this digital camera, the photographing surface is divided into a plurality of regions, and the distance to the subject is measured for each region by an optical triangulation method. Then, based on the measured distance, a range in which the main subject is included is detected, and image processing is performed so as to blur an image of another area not including the main subject.

  By the way, in the digital camera that measures the subject distances of a plurality of regions as described above, a measuring device for measuring the subject distances of the respective regions is necessary, and there is a problem in that the manufacturing cost increases. In addition, when dividing the imaging surface, if the number of divisions is small, the blurring becomes unnatural, but if the number of divisions is increased, a measuring device that measures the subject distance for each of the large number of areas accordingly Is required, which further increases the manufacturing cost.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an imaging apparatus capable of obtaining a focus effect such as portrait photography with a simple configuration.

  In order to achieve the above object, according to the first aspect of the present invention, the first shooting for obtaining the first shot image and the second shooting for obtaining the second shot image are performed by the image sensor, and the main subject is shot during the first shooting. A shooting control unit that matches the focus of the lens and causes the strobe device to emit light at a predetermined light emission amount during the second shooting, a distance acquisition unit that acquires a subject distance to the main subject, and a pixel of the second captured image The subject distance to the subject on the pixel of the corresponding first captured image is obtained based on the brightness, and the difference between the subject distance and the subject distance to the main subject obtained by the distance obtaining unit is obtained for each pixel. And image processing means for blurring each pixel of the first photographed image with a blur amount corresponding to the difference in the corresponding subject distance.

  According to the second aspect of the present invention, the shutter device is provided, and at the time of the second photographing, photographing is performed by driving the shutter device at the highest shutter speed that can be synchronized with the strobe light emission of the strobe device.

  According to a third aspect of the present invention, an autofocus unit for the taking lens is provided, and the distance acquisition unit acquires a subject distance from the autofocus unit to the main subject.

  In the fourth aspect of the invention, the first photographing for obtaining the first photographed image and the second photographing for obtaining the second photographed image are performed by the image sensor, and the focus of the photographing lens is matched with the main subject during the first photographing. The photographing control means for focusing the photographing lens to infinity at the time of two photographing, and the first and second photographed images are each divided into a plurality of regions, and the spatial frequency of the corresponding regions of the first and second photographed images is divided. A difference in the magnitude of the high-frequency component is obtained for each region of the first photographed image, and each pixel in each region of the first photographed image is blurred with a blur amount based on the difference in the magnitude of the high-frequency component corresponding to that region. And image processing means.

  According to the fifth aspect of the present invention, distance acquisition means for acquiring the subject distance to the main subject, brightness acquisition means for acquiring the brightness of the shooting scene, and the first shooting and the second shooting for obtaining the first shot image. When the second photographing for obtaining the photographed image is performed by the image sensor and the brightness of the photographing scene obtained from the brightness acquisition means is lower than a predetermined level, the focus of the photographing lens is matched with the main subject at the first photographing, The flash device emits light with a predetermined light emission amount during two shootings, and when the brightness of the shooting scene is a predetermined level or more, the main lens is focused on the main subject during the first shooting, and the shooting lens is set during the second shooting. When the brightness of the shooting scene is lower than a predetermined level, the shooting control means for focusing at infinity and the corresponding first brightness based on the brightness of the pixel of the second shot image The subject distance to the subject on the pixel of the shadow image is obtained, the difference between the subject distance and the subject distance to the main subject obtained by the distance obtaining unit is obtained for each pixel, and each pixel of the first captured image is obtained. Each of the first and second captured images is divided into a plurality of areas when the brightness of the shooting scene is equal to or higher than a predetermined level, and the first and second captured images are divided into a plurality of regions, respectively. A difference in the size of the high-frequency component of the spatial frequency between the corresponding regions of the image is obtained for each region of the first captured image, and each pixel in each region of the first captured image has a size of the high-frequency component corresponding to that region. Image processing means for blurring with a blur amount based on the difference in height.

  According to the present invention, the amount of blur based on the difference between the subject distance on the pixel and the subject distance to the main subject obtained from the brightness of the pixel of the second photographed image captured by the strobe device emitting light with a predetermined light emission amount. Since each pixel of the first photographed image photographed by matching the focus of the photographing lens to the main subject is blurred, it is possible to obtain a photographed image having a focus effect such as portrait photography without a special device. Can do.

  In addition, the first photographed image obtained by matching the main lens with the focus of the photographing lens and the second photographed image obtained by matching the focus of the photographing lens at infinity are divided into a plurality of areas, respectively. Since each pixel in each area of the first photographed image is blurred with a blur amount based on the difference in the magnitude of the high frequency component of the spatial frequency between the corresponding areas, it is possible to perform portrait photography without a special device. It is possible to obtain a photographed image with a great focus effect.

  FIG. 1 shows the configuration of a digital camera embodying the present invention. The system controller 10 receives operation signals corresponding to operations of the release button 11 and the operation unit 12, and controls each unit of the digital camera based on these operation signals.

  The release button 11 can be operated between a half-pressed position and a fully-pressed position further pressed from the half-pressed position. When the half-pressed position is set, the subject at the center of the shooting screen at that time is in focus, and the so-called AF lock and AE lock states are maintained in an exposure suitable for the subject. It is said. If the release button 11 is continuously depressed from the half-pressed position to the full-pressed position, a still image is shot with the exposure setting at the time of the half-pressed position and the focus position at the time of the half-pressed position. In the portrait mode, the details of which will be described later, assuming the fully-pressed position, under the control of the system controller 10 as the imaging control means, the first imaging is performed after the pre-imaging as the second imaging with strobe light emission is performed. A certain shooting is performed. Note that either the first shooting or the second shooting may be performed first. In person photography, it may be determined that the subject has been photographed by the flash emission, and the subject may move. Therefore, it is preferable to perform the second photography with the flash emission after the first photography.

  The operation unit 12 includes a power button for turning on / off the power of the digital camera and various buttons and keys for performing operations related to shooting and reproduction. By operating the operation unit 12, it is possible to switch between the shooting mode and the playback mode, to select the normal mode and the portrait mode under the shooting mode, and to select the blur level in the portrait mode.

  Behind the taking lens 13 is a CCD image sensor 14 for taking a subject image. The taking lens 13 incorporates a diaphragm 15 that limits the intensity of light incident on the CCD image sensor 14. The diaphragm 15 is a fixed diaphragm having a fixed diaphragm diameter, but may be one that can adjust the diaphragm diameter. The focus mechanism 16 includes a motor and a driver circuit that move a focus lens incorporated in the photographic lens 13 along the optical axis direction, and performs focusing of the photographic lens 13 by moving the focus lens.

  The focus mechanism 16 includes an encoder for detecting the movement position of the focus lens in the photographing lens 13, and sends a lens position signal corresponding to the movement position of the focus lens to the system controller 10. Under the portrait mode, the system controller 10 acquires a subject distance to the main subject that is in focus with the photographing lens 13 (hereinafter referred to as a main subject distance) based on the lens position signal.

  The light passing through the photographing lens 13 enters the CCD image sensor 14. The CCD image sensor 14 photoelectrically converts a subject image by converting incident subject light into electric charge corresponding to the amount of incident light and storing it. The CCD image 14 has a so-called electronic shutter function for controlling the charge accumulation time. The CCD image 14 is driven by a driver 17 and outputs a photoelectrically converted subject image as an analog photographing signal. As the image sensor, a MOS image sensor or the like instead of the CCD image sensor may be used.

  In the shutter device 18, the shutter blades are arranged on the optical path between the photographing lens 13 and the CCD image sensor 14. The shutter device 18 includes, in addition to the shutter blades, an actuator that drives the shutter blades, a driver circuit, and the like. Normally, the shutter blades of the shutter device 18 are opened, and the exposure amount is controlled by the electronic shutter function of the CCD image 14. At the time of shooting a still image in response to the operation of the release button 11, the shutter blade is once closed and then the shutter blade is opened and closed at a shutter speed corresponding to the subject brightness.

  During pre-photographing in the portrait mode, the shutter device 18 eliminates the influence of available light as much as possible, and detects the brightness of the subject when illuminated with the strobe light with high accuracy. It opens and closes at the fastest shutter speed that can be tuned. The shutter device 18 sends a sync signal to the system controller 10 in order to emit strobe light in synchronization with the opening and closing of the shutter blades.

  When such a mechanical shutter device 18 is used, it is preferable to use a lens shutter having a fast tunable shutter speed. Further, when a mechanical shutter device is not provided, the shutter speed (exposure time) of the electronic shutter function of the CCD image sensor 14 is set to the fastest speed that can be synchronized with the flash emission. Further, the shutter blades are opened in synchronization with the pre-photographing, pre-photographing is performed in which the exposure amount is controlled by the electronic shutter function of the CCD image sensor 14, and then the main photographing is performed with the shutter blades being opened. The shutter blades may be closed in synchronization with

  A photographing signal from the CCD image sensor 14 is input to the analog signal processing unit 19. The analog signal processing unit 19 performs noise removal and signal amplification by correlated double sampling (CDS) on the input photographing signal.

  The photographing signal from the analog signal processing unit 19 is sent to the A / D converter 21. The A / D converter 21 digitally converts the photographic signal and sends the obtained image data to the AE / AF detection unit 22 and the image processing unit 23. The image data includes, for example, luminance data corresponding to the luminance signal and each color difference data corresponding to each color difference signal.

  The AE / AF detection unit 22 constitutes an autofocus unit together with the focus mechanism 16, detects the contrast of the subject image being shot based on the image data, and outputs the result as an AF evaluation value. The AE / AF detection unit 22 detects the subject brightness of the subject image being shot based on the image data, and outputs the result as an AE evaluation value. The AF and AE evaluation values are sent to the system controller 10.

  The system controller 10 controls the charge accumulation time of the CCD image sensor 14 and the shutter speed of the shutter device 18 based on the AE evaluation value. Further, the system controller 10 focuses the photographing lens 13 via the focus mechanism 16 so that the contrast of the subject image being photographed is maximized based on the AF evaluation value.

  The image processing unit 23 performs normal processing including white balance correction processing and gamma correction on the image data. When the image being photographed is displayed on the LCD 24 as a moving image, that is, when the LCD 24 functions as an electronic viewfinder, image data obtained by continuous photographing by the CCD image sensor 14 is subjected to normal processing by the image processing unit 23. Later, it is sequentially sent to the LCD driver 25. The LCD driver 25 drives the LCD 24 based on sequentially input image data. As a result, the image being shot is displayed on the LCD 24 as a moving image.

  At the time of shooting a still image in response to the pressing operation of the release button 11, the image data obtained in response to the pressing operation of the release button 11 is subjected to normal processing and compression processing by the image processing unit 23. It is converted into compressed image data in JPEG format. The compressed image data is sent to the memory card 26 for writing.

  At the time of shooting in the portrait mode, the image processing unit 23 uses image data obtained by pre-shooting (hereinafter referred to as pre-shot image data) and image data obtained by main shooting (hereinafter referred to as main shot image data). Each data is once written in the work memory 27, and then the blurring process, the normal process, and the compression process are sequentially performed on the actual captured image data and the obtained compressed image data is written in the memory card 26.

  The blur process includes an index calculation process for obtaining a distance index, and an averaging process for blurring a subject other than the main subject in a pseudo amount so as not to be in focus with a blur amount based on the distance index. In the index calculation process, the subject distance of the subject on each pixel is obtained from the pre-photographed image data of each pixel obtained by pre-photographing, and the difference between this subject distance and the main subject distance (= subject distance-main subject distance) is This is a pixel distance index. When obtaining the subject distance from the brightness, various methods such as converting the brightness to the subject distance using a data table or calculating the brightness to the subject distance by performing a calculation are employed. Can do. As described above, the main subject distance is acquired from the focus mechanism 16 by the system controller 10 and is given to the image processing unit 23.

  The brightness of the subject (pixel) obtained by flash photography is determined by the strobe light component determined by the subject distance, the reflectance of the subject, the amount of strobe light, the aperture diameter, the available light intensity, the shutter speed, the aperture diameter, etc. It consists of an available light component determined as a parameter. The available light component of each light component can be reduced by performing flash photography at the highest shutter speed that can be synchronized with the flash emission. If the reflectance of the subject is assumed to be a constant value, for example, the same reflectance (18%) as that of the standard reflector, the brightness of the subject is inversely proportional to the square of the subject distance under a certain amount of strobe light emission. To do. Furthermore, other parameters such as the amount of strobe light and the aperture diameter are known. Therefore, the subject distance of the subject corresponding to the pixel can be obtained from the brightness of the pixel indicated by the pre-captured image data.

  In the case of a subject whose reflectivity is significantly different from that of the standard reflector, there is a large difference between the subject distance required as described above and the actual subject distance. There is no influence because it does not give the person a great sense of incongruity.

  In the blur processing described above, image processing is performed on each pixel so that the blur amount is based on the blur level selected by the operation unit 12 and the distance index. The blur level can be selected from “strong”, “medium”, and “weak” by operating the selection unit 12. In this blur level, the degree of blur increases in the order of “weak”, “medium”, and “strong”.

  As shown in FIG. 2, under the same blur level, the greater the distance index, that is, the greater the distance from the main subject, the greater the blur amount, and the ratio of the change in the blur amount to the change in the distance index is The higher the blur level, the larger the blur level, and the greater the blur level, the greater the blur amount even with the same distance index.

  This blur processing is performed by replacing the average value of the actual captured image data of the pixel to be blurred and the surrounding pixels with the actual captured image data of the pixel to be blurred. In this process, as shown in FIG. 3, the average value is calculated using more pixels as the distance index is larger and the blur level is stronger. Note that, when calculating the average value, an appropriate weight may be given to the actual captured image data.

  In FIG. 1, a strobe device 28 emits strobe light with a constant light amount in synchronization with opening / closing of shutter blades during pre-photographing. The strobe device 28 is provided for normal strobe photography, and can emit strobe light during normal photography. The strobe device 28 only needs to emit light with a constant strobe light amount during pre-photographing. For example, even if it is an automatic light control type, it may be capable of emitting light with a constant strobe light amount during pre-photographing. If the strobe light amount is known, the strobe light amount may be changed during pre-shooting. Furthermore, strobe light emission may be performed in the main photographing under the portrait mode.

  Next, the operation of the above configuration will be described with reference to FIG. When shooting using a focus effect such as portrait shooting, the operation unit 12 is operated to select a shooting mode, and a portrait mode is selected under this shooting mode. Furthermore, the operating unit 12 is operated to select a blur level.

  When the photographing mode is set, the moving image is photographed by the CCD image sensor 14 as in the case of the conventional digital camera, and the photographing signal obtained by the photographing is converted into image data via the analog processing circuit 19 and the A / D converter 21. Is converted to

  Image data from the A / D converter 21 is sent to the AE / AF detection unit 22 and the image processing unit 23, respectively. Then, the charge accumulation time of the CCD image sensor 42 is adjusted based on the AE evaluation value from the AE / F detection circuit 22, and the focus mechanism 16 is driven based on the AF evaluation value so that the focus position of the photographing lens 13 is adjusted. Adjusted. These adjustments are made continuously. In addition, the image data that has been subjected to the normal processing in the image processing unit 23 is sequentially sent to the LCD driver 25, so that the subject image being photographed is displayed on the LCD 24 as a moving image.

  As described above, the subject image displayed on the LCD 24 is observed and framing is performed so that the main subject is at the center of the shooting screen, and then the release button 11 is pressed. When the release button 11 is set to the half-pressed position in the portrait mode, it is confirmed whether or not the subject at the center of the shooting screen is in focus based on the AE evaluation value. After the alignment, the focus position of the photographing lens 13 is fixed in a state where the subject (main subject) is in focus. Further, the shutter speed of the shutter device 18 is determined based on the AF evaluation value. Note that the framing may be changed while the release button 11 is in the half-pressed position so that the distance to the main subject does not change after the focus position is fixed.

  When the focus position of the photographic lens 13 is fixed in response to half-pressing of the release button 11 as described above, the lens position signal output from the focus mechanism unit 16 is examined by the system controller 10 to check the main subject. The main subject distance which is the subject distance up to is acquired. This main subject distance is given to the image processing unit 23.

  If the release button 11 is continuously pressed and set to the fully-pressed position, pre-photographing is performed first. In pre-photographing, the shutter blades of the shutter device 18 are opened and closed at the fastest shutter speed that can be synchronized with strobe light emission, regardless of the brightness of the subject, and a sync signal synchronized with this operation is sent via the system controller 10. To the strobe device 28. Thus, the strobe device 28 emits strobe light while the shutter blades are open, and a constant amount of strobe light is emitted toward the subject.

  The subject light from the subject irradiated with the strobe light as described above enters the CCD image sensor 14, undergoes photoelectric conversion, and is accumulated as a charge. When the shutter blades are closed, the charge accumulated in the CCD image sensor 14 is read and output as a photographing signal. The photographing signal is written in the work memory 27 as pre-photographed image data via the analog processing circuit 19, the A / D converter 21, and the image processing unit 23.

  When the writing of the pre-photographed image data to the work memory 27 is completed, the main photographing is performed. In the actual photographing, the shutter blades of the shutter device 18 are opened and closed at the shutter speed determined based on the previous AE evaluation value, and exposure by the CCD image sensor 14 is performed while the shutter blades are open. This main shooting is the same as the shooting of a conventional digital camera.

  After the shutter blades are closed, a photographing signal for actual photographing is output from the CCD image sensor 14. Then, the photographing signal is written in the work memory 27 as actual photographing image data via the analog signal processing unit 19, the A / D converter 21, and the image processing unit 23.

  After the captured image data is written in the work memory 27, the image processing unit 23 performs index calculation processing. First, pre-photographed image data written in the work memory 27 is sequentially read out by the image processing unit 23, and each pre-photographed image data is converted into a subject distance corresponding to the brightness indicated by the pre-photographed image data. The difference between the subject distance calculated thereafter and the main subject distance previously given from the system controller 10 is obtained and used as a distance index.

  If the image data is data indicating, for example, red, green, and blue gradations, data indicating brightness is created from these, and the subject distance may be calculated from the data. When the image data is composed of luminance data corresponding to the luminance signal and color difference data corresponding to the color difference signal, the subject distance may be calculated using the luminance data.

  Subsequently, an averaging process is performed on the actual captured image data. In this averaging process, the actual captured image data of the pixel to be processed and the actual captured image data of the pixels around the pixel are read out. When reading out the surrounding pixels, the number of pixels determined by the distance index obtained from the pre-photographed image pixel at the same position as the pixel to be processed and the blur level selected by the operation unit 12 is obtained. Captured image data is read out. Then, an average value of the actual captured image data of the pixel to be processed and the surrounding pixels is obtained, and this is used as new actual captured image data of the pixel to be processed.

  As described above, when the averaging process is completed for all the actual captured image data, the normal captured image data obtained by the averaging process is subjected to normal processing and compression processing, and the compressed image data is stored in the memory. Recorded on the card 26.

  As described above, an image is obtained in which the main subject is in focus and the subject closer and farther than the main subject is blurred according to the distance.

  The example shown in FIG. 5 shows an example using a high frequency component of the spatial frequency. In addition, except being demonstrated below, it is the same as the said embodiment, The same code | symbol is attached | subjected and demonstrated to the substantially same structural member.

  In this example, pre-photographing and main-photographing are performed in the same manner as in the above-described embodiment. In pre-photographing, instead of performing strobe photographing, photographing is performed with the photographing lens 13 focused on a subject at infinity. In the main shooting, the main subject is focused and shot. The lens position of the taking lens 13 at the time when the release button 11 is half-pressed, that is, the lens position that is in focus with the main subject is stored in the memory in the system controller 10, and this pre-shooting focus position is stored. The actual photographing is performed after the photographing lens 13 is driven.

  The image processing unit 23 divides the pre-photographed image obtained by the pre-photographing and the main photo-photographed image obtained by the main photographing into a plurality of regions having appropriate sizes. Then, the difference in the size of the high-frequency component of the spatial frequency between the corresponding regions of the pre-photographed image and the main-photographed image (= high-frequency component of the pre-photographed image region−high-frequency component of the pre-photographed image region) is used as a distance index. An averaging process is performed so that the larger the distance index is, the larger the blur amount is.

  When the magnitudes of the high-frequency components of the spatial frequency are compared between corresponding regions of the pre-photographed image and the main-photographed image, the relationship of “main image> pre-image” is obtained in a region composed of subjects at the same distance as the main subject. . Further, in a region composed of a subject farther from the main subject, a relationship of “main image <pre-image” is established, and as the distance from the main subject increases, the high-frequency component of the spatial frequency of the pre-image increases. Therefore, by performing the averaging process based on the distance index obtained as described above, it is possible to obtain an image in which the main subject is in focus and a subject farther than that is blurred.

  FIG. 6 shows an example in which a method for calculating a distance index is automatically selected according to the brightness of the shooting scene. When the brightness of the photographic scene is lower than a predetermined reference level, the system controller 10 creates a distance index according to the procedure described in the first embodiment (hereinafter referred to as the first method). Averaging processing is performed on actual captured image data obtained by actual imaging based on the distance index. On the other hand, if the shooting scene is equal to or higher than a predetermined reference level, a distance index is created and averaged by the same procedure as the embodiment shown in FIG. 5 (hereinafter referred to as the second method). . The brightness of the shooting scene can be obtained as subject brightness obtained based on the AE evaluation value from the AE / AF detection unit 22.

  Shooting synchronized with strobe lighting cannot exceed the sync speed that can be synchronized, so even in the case of a lens shutter with a high sync speed, for example, a lens shutter, the brightness component of the available light is available in pre-shooting. And the influence cannot be ignored in the first method. On the other hand, in the case of the second method, since the main photographing is performed after the photographing lens 13 is focused after the pre photographing, the interval between the pre photographing and the main photographing is easily opened. However, according to this example, a distance index is created by the second method in a bright shooting scene, and the first method is used in a shooting scene with a brightness that can ignore the influence of available light. It is possible to shoot with the preferred method in the shooting scene.

  In the above embodiment, a digital camera has been described as an example of a photographing apparatus. However, the present invention can be used for various apparatuses that perform photographing using a C image sensor. For example, a mobile phone with a photographing function such as a mobile phone with a camera. It can also be used for equipment photography equipment.

It is a block diagram which shows the structure of the digital camera which implemented this invention. It is a graph which shows the relationship between a distance parameter | index, a blur level, and a blur amount. It is a graph which shows the number of the image data used by the averaging process. It is a flowchart which shows the process sequence in portrait mode. It is a flowchart which shows another example using the high frequency component of a spatial frequency. An example in which processing in the portrait mode is switched according to the brightness of the shooting scene is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 System controller 13 Shooting lens 18 Shutter apparatus 16 Focus mechanism 22 AE / AF detection part 23 Image processing part

Claims (5)

In a photographing apparatus comprising a photographing lens, an image sensor for photographing a subject to obtain a photographed image, and a strobe device that emits strobe light toward the subject,
The first photographing for obtaining the first photographed image and the second photographing for obtaining the second photographed image are performed by the image sensor, the focus of the photographing lens is matched with the main subject at the first photographing, and the strobe device is set at the second photographing. Shooting control means that emits light with the light emission amount, distance acquisition means for acquiring the subject distance to the main subject, and the subject on the pixel of the first photographed image corresponding to the brightness of the pixel of the second photographed image And the difference between the subject distance and the subject distance to the main subject acquired by the distance acquisition unit is obtained for each pixel, and each pixel of the first photographed image is set to the corresponding subject distance difference. An imaging apparatus comprising image processing means for blurring each image with a corresponding blur amount.   The photographing apparatus according to claim 1, further comprising a shutter device, wherein the second photographing is performed by driving the shutter device at a fastest shutter speed that can be synchronized with the strobe light emission of the strobe device.   The photographing apparatus according to claim 1, further comprising an autofocus unit for a photographing lens, wherein the distance acquisition unit acquires a subject distance from the autofocus unit to a main subject. In a photographing apparatus including a photographing lens and an image sensor for photographing a subject to obtain a photographed image,
The first photographing for obtaining the first photographed image and the second photographing for obtaining the second photographed image are performed by the image sensor, and the focus of the photographing lens is matched with the main subject at the first photographing, and the photographing lens is moved to infinity at the second photographing. The first and second photographed images are each divided into a plurality of areas, and the difference in magnitude of the spatial frequency high-frequency component between the corresponding areas of the first and second photographed images is obtained. Image processing means for obtaining each region of the first photographed image and blurring each pixel in each region of the first photographed image with a blur amount based on a difference in magnitude of a high-frequency component corresponding to the region; An imaging device characterized by In a photographing apparatus comprising a photographing lens, an image sensor for photographing a subject to obtain a photographed image, and a strobe device that emits strobe light toward the subject,
Distance acquisition means for acquiring the subject distance to the main subject, brightness acquisition means for acquiring the brightness of the shooting scene, first shooting for obtaining the first shot image, and second shooting for obtaining the second shot image. When the brightness of the photographic scene obtained from the brightness acquisition means is lower than a predetermined level, the photographic lens is focused on the main subject during the first shooting, and the strobe device is set during the second shooting. When the brightness of the shooting scene is above a predetermined level, the shooting lens is focused on the main subject during the first shooting, and the shooting lens is focused at infinity during the second shooting. When the brightness of the photographic scene is lower than a predetermined level with the control means, the subject on the pixel of the first photographed image corresponding to the brightness of the pixel of the second photographed image And the difference between the subject distance and the subject distance to the main subject obtained by the distance obtaining means is obtained for each pixel, and each pixel of the first photographed image is set to the corresponding subject distance difference. When the image is blurred with a corresponding blur amount and the brightness of the shooting scene is equal to or higher than a predetermined level, the first and second shot images are divided into a plurality of areas, respectively. A difference in the size of the high frequency component of the spatial frequency is obtained for each region of the first captured image, and each pixel in each region of the first captured image is blurred based on the difference in the size of the high frequency component corresponding to that region. An image pickup apparatus comprising: an image processing unit that blurs in amount.

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