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JP2003348609A5
JP2003348609A5 JP2002156003A JP2002156003A JP2003348609A5 JP 2003348609 A5 JP2003348609 A5 JP 2003348609A5 JP 2002156003 A JP2002156003 A JP 2002156003A JP 2002156003 A JP2002156003 A JP 2002156003A JP 2003348609 A5 JP2003348609 A5 JP 2003348609A5
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luminance signal
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luminance
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撮像素子により撮像して得られた画像信号を処理する信号処理装置であって、
入力した画像信号に基づいて、第１の方式により第１の輝度信号を生成する第１の輝度信号生成手段と、
前記入力した画像信号に基づいて、第２の方式により第２の輝度信号を生成する第２の輝度信号生成手段と、
前記入力した画像信号に基づいて、当該画像信号が白黒画像を示すか、カラー画像を示すかを判別する判別手段と、
前記判別手段による判別結果に応じて、前記第１の輝度信号及び前記第２の輝度信号を混合する混合手段と
を有することを特徴とする信号処理装置。A signal processing device that processes an image signal obtained by imaging with an imaging element,
First luminance signal generation means for generating a first luminance signal by the first method based on the input image signal;
Second luminance signal generating means for generating a second luminance signal by a second method based on the input image signal;
Discrimination means for discriminating whether the image signal indicates a monochrome image or a color image based on the input image signal;
A signal processing apparatus comprising: a mixing unit that mixes the first luminance signal and the second luminance signal according to a determination result by the determination unit. 前記第１の方式はOutofGreen方式であり、前記第２の方式はSwitchY方式であって、前記混合手段は前記判別手段が白黒画像であると判別した場合に前記第２の輝度信号を出力し、カラー画像であると判別した場合に前記第１の輝度信号を出力することを特徴とする請求項１に記載の信号処理装置。  The first method is an OutofGreen method, the second method is a SwitchY method, and the mixing unit outputs the second luminance signal when the determining unit determines that the image is a black and white image, The signal processing apparatus according to claim 1, wherein the first luminance signal is output when the color image is determined. 前記判別手段は、白黒画像、カラー画像又はそれらの中間を示す信号を出力し、当該中間である場合、前記混合手段は出力された信号値に基づく割合で、前記第１の輝度信号及び前記第２の輝度信号を混合することを特徴とする請求項２に記載の信号処理装置。  The discriminating means outputs a black and white image, a color image or a signal indicating an intermediate between them, and in the case of being in the intermediate, the mixing means outputs the first luminance signal and the first image at a ratio based on the output signal value. The signal processing apparatus according to claim 2, wherein two luminance signals are mixed. 前記入力した画像信号に基づいて、当該画像信号が示す画像中の斜め線を示す部分を検出する検出手段を更に有し、
前記混合手段は、前記判別手段による判別結果及び前記検出手段による検出結果に応じて、前記第１の輝度信号及び前記第２の輝度信号を混合することを特徴とする請求項１に記載の信号処理装置。Based on the input image signal, further comprising a detecting means for detecting a portion showing an oblique line in the image indicated by the image signal;
2. The signal according to claim 1, wherein the mixing unit mixes the first luminance signal and the second luminance signal in accordance with a determination result by the determination unit and a detection result by the detection unit. Processing equipment. 前記第１の方式はOutofGreen方式であり、前記第２の方式はSwitchY方式であって、前記混合手段は前記判別手段が白黒画像であると判別し、且つ前記検出手段が斜め線を検出した場合に前記第２の輝度信号を出力し、それ以外の場合に前記第１の輝度信号を出力することを特徴とする請求項４に記載の信号処理装置。  The first method is an OutofGreen method, the second method is a SwitchY method, the mixing unit determines that the determination unit is a black and white image, and the detection unit detects a diagonal line 5. The signal processing apparatus according to claim 4, wherein the second luminance signal is output to the output terminal, and the first luminance signal is output in other cases. 前記判別手段は、白黒画像、カラー画像又はそれらの中間を示す信号を出力し、また、前記検出手段は、斜め線であることの確率を示す信号を出力し、各信号が中間値を示す場合、前記混合手段は出力された信号値に基づく割合で、前記第１の輝度信号及び前記第２の輝度信号を混合することを特徴とする請求項５に記載の信号処理装置。  The discrimination means outputs a black and white image, a color image or a signal indicating the middle thereof, and the detection means outputs a signal indicating the probability of being a diagonal line, and each signal indicates an intermediate value. 6. The signal processing apparatus according to claim 5, wherein the mixing unit mixes the first luminance signal and the second luminance signal at a ratio based on the output signal value. 撮像素子により撮像して得られた画像信号を処理する信号処理装置であって、
入力した画像信号に基づいて、第１の方式により第１の輝度信号を生成する第１の輝度信号生成手段と、
前記入力した画像信号に基づいて、第２の方式により第２の輝度信号を生成する第２の輝度信号生成手段と、
前記入力した画像信号に基づいて、当該画像信号が示す画像中の斜め線を示す部分を検出する検出手段と、
前記検出手段による検出結果に応じて、前記第１の輝度信号及び前記第２の輝度信号を混合する混合手段と
を有することを特徴とする信号処理装置。A signal processing device that processes an image signal obtained by imaging with an imaging element,
First luminance signal generation means for generating a first luminance signal by the first method based on the input image signal;
Second luminance signal generating means for generating a second luminance signal by a second method based on the input image signal;
Detecting means for detecting a portion indicating an oblique line in an image indicated by the image signal based on the input image signal;
A signal processing apparatus comprising: a mixing unit that mixes the first luminance signal and the second luminance signal in accordance with a detection result of the detection unit. 前記第１の方式はOutofGreen方式であり、前記第２の方式はSwitchY方式であって、前記混合手段は前記検出手段が斜め線を検出した場合に前記第２の輝度信号を出力し、それ以外の場合に前記第１の輝度信号を出力することを特徴とする請求項７に記載の信号処理装置。  The first method is an OutofGreen method, the second method is a SwitchY method, and the mixing unit outputs the second luminance signal when the detection unit detects an oblique line, and the others The signal processing apparatus according to claim 7, wherein the first luminance signal is output in the case of. 前記検出手段は、斜め線であることの確率を示す信号を出力し、当該信号が中間値を示す場合、前記混合手段は出力された信号値に基づく割合で、前記第１の輝度信号及び前記第２の輝度信号を混合することを特徴とする請求項８に記載の信号処理装置。  The detection means outputs a signal indicating the probability of being a diagonal line, and when the signal indicates an intermediate value, the mixing means outputs the first luminance signal and the ratio at a ratio based on the output signal value. The signal processing apparatus according to claim 8, wherein the second luminance signal is mixed. 前記判別手段は、前記入力した画像信号から彩度信号を生成し、当該彩度信号に基づいて判別を行うことを特徴とする請求項１乃至６のいずれかに記載の信号処理装置。The discriminating means generates a luminance signal from an image signal obtained by said input signal processing apparatus according to any one of claims 1 to 6, characterized in that the determination on the basis of the chroma signal. 前記判別手段は、前記彩度信号に対して、最大値フィルタを適用する手段あるいは明るさで正規化する手段のうち少なくとも一つの手段を有することを特徴とする請求項１０に記載の信号処理装置。  11. The signal processing apparatus according to claim 10, wherein the determination unit includes at least one of a unit that applies a maximum value filter and a unit that normalizes the brightness signal with respect to the saturation signal. . 前記検出手段は、斜め方向のエッジを抽出する少なくとも１つ以上のバンドパスフィルタまたはハイパスフィルタを有し、その出力結果に基づいて検出を行うことを特徴とする請求項４乃至７のいずれかに記載の信号処理装置。Said detecting means includes at least one or more bandpass filters or high-pass filter for extracting a diagonal edge, in any one of claims 4 to 7, characterized in that the detection based on the output result The signal processing apparatus as described. 前記検出手段は、斜め方向のエッジを抽出する少なくとも１つ以上のバンドパスフィルタまたはハイパスフィルタと、少なくとも１つ以上のローパスフィルタとを有し、その出力結果に基づいて検出を行うことを特徴とする請求項４乃至７のいずれかに記載の信号処理装置。The detection means includes at least one band-pass filter or high-pass filter that extracts an edge in an oblique direction, and at least one low-pass filter, and performs detection based on an output result thereof. the signal processing apparatus according to any one of claims 4 to 7. 前記検出手段は、前記バンドパスフィルタあるいは前記ハイパスフィルタの出力結果を、明るさで正規化する手段あるいは最大値フィルタを適用する手段のうち少なくとも一つの手段を有することを特徴とする請求項１２または１３に記載の信号処理装置。  13. The detection unit includes at least one of a unit that normalizes an output result of the band-pass filter or the high-pass filter with brightness, or a unit that applies a maximum value filter. 14. The signal processing device according to 13. 前記第１及び第２の輝度信号生成手段は、各色の構成比が異なる複数の輝度信号を作成することを特徴とする請求項１，４，又は７のいずれかに記載の信号処理装置。  The signal processing apparatus according to claim 1, wherein the first and second luminance signal generating units generate a plurality of luminance signals having different composition ratios of the respective colors. 前記撮像素子が原色ベイヤー配列のフィルタを有する撮像素子であり、前記第１及び第２の輝度信号生成手段のうちの少なくとも一方が、レッド信号、グリーン信号、ブルー信号の構成比を１対２対１とする輝度信号を作成することを特徴とする請求項１乃至１５のいずれかに記載の信号処理装置。  The image pickup device is an image pickup device having a primary color Bayer array filter, and at least one of the first and second luminance signal generation means sets the composition ratio of the red signal, the green signal, and the blue signal to one to two. The signal processing apparatus according to claim 1, wherein a luminance signal of 1 is created. 前記第１及び第２の輝度信号生成手段が、それぞれ複数のカラー信号をもとに高域強調信号を生成する手段を有することを特徴とする請求項１乃至１６のいずれかに記載の信号処理装置。  17. The signal processing according to claim 1, wherein each of the first and second luminance signal generation units includes a unit that generates a high frequency emphasis signal based on a plurality of color signals. apparatus. 前記混合手段により混合された信号から高域強調信号を作成する高域強調信号作成手段を更に有することを特徴とする請求項１乃至１６のいずれかに記載の信号処理装置。  17. The signal processing apparatus according to claim 1, further comprising a high-frequency emphasized signal creating unit that creates a high-frequency emphasized signal from the signal mixed by the mixing unit. 撮像素子により撮像して得られた画像信号を処理する信号処理方法であって、
入力した画像信号に基づいて、第１の方式により第１の輝度信号を生成する第１の輝度信号生成工程と、
前記入力した画像信号に基づいて、第２の方式により第２の輝度信号を生成する第２の輝度信号生成工程と、
前記入力した画像信号に基づいて、当該画像信号が白黒画像を示すか、カラー画像を示すかを判別する判別工程と、
前記判別工程における判別結果に応じて、前記第１の輝度信号及び前記第２の輝度信号を混合する混合工程と
を有することを特徴とする信号処理方法。A signal processing method for processing an image signal obtained by imaging with an imaging device,
A first luminance signal generating step for generating a first luminance signal by the first method based on the input image signal;
A second luminance signal generating step for generating a second luminance signal by a second method based on the input image signal;
A determination step of determining whether the image signal indicates a black and white image or a color image based on the input image signal;
A signal processing method comprising: a mixing step of mixing the first luminance signal and the second luminance signal in accordance with a determination result in the determination step. 撮像素子により撮像して得られた画像信号を処理する信号処理方法であって、
入力した画像信号に基づいて、第１の方式により第１の輝度信号を生成する第１の輝度信号生成工程と、
前記入力した画像信号に基づいて、第２の方式により第２の輝度信号を生成する第２の輝度信号生成工程と、
前記入力した画像信号に基づいて、当該画像信号が示す画像中の斜め線を示す部分を検出する検出工程と、
前記検出工程における検出結果に応じて、前記第１の輝度信号及び前記第２の輝度信号を混合する混合工程と
を有することを特徴とする信号処理方法。A signal processing method for processing an image signal obtained by imaging with an imaging device,
A first luminance signal generating step for generating a first luminance signal by the first method based on the input image signal;
A second luminance signal generating step for generating a second luminance signal by a second method based on the input image signal;
A detection step of detecting a portion indicating an oblique line in an image indicated by the image signal based on the input image signal;
And a mixing step of mixing the first luminance signal and the second luminance signal according to a detection result in the detection step. 請求項１９または２０に記載の信号処理方法を実現するためのプログラムコードを有する情報処理装置が実行可能なプログラム。A program executable by an information processing apparatus having a program code for realizing the signal processing method according to claim 19 or 20 . 請求項２１に記載のプログラムを記憶した記憶媒体。A storage medium storing the program according to claim 21 .
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JP4965903B2 (en) * 2006-06-16 2012-07-04 キヤノン株式会社 Image processing apparatus and method
JP4859220B2 (en) * 2006-09-13 2012-01-25 キヤノン株式会社 Luminance signal creation device, brightness signal creation method, and imaging device
JP2009171196A (en) * 2008-01-16 2009-07-30 Olympus Imaging Corp Image processor, image processing method, and image processing program
JP5129685B2 (en) 2008-08-06 2013-01-30 キヤノン株式会社 Luminance signal generation apparatus, luminance signal generation method, and imaging apparatus
GB2488283B (en) * 2009-12-04 2015-10-21 Canon Kk Image Processing device
EP2536152B1 (en) * 2010-02-12 2018-09-05 Canon Kabushiki Kaisha Image processing device and image processing method
CN104301586A (en) * 2010-02-12 2015-01-21 佳能株式会社 Device and method for generating luminance signals according to image data
US8692906B2 (en) * 2010-07-13 2014-04-08 Canon Kabushiki Kaisha Luminance signal generation apparatus, luminance signal generation method, image pickup apparatus, and storage medium

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