JP3079669B2 - Image processing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, and more particularly to an image editing apparatus and an electronic filing apparatus for processing image information including character information as a quantized electric signal, and an image reduction processing method in a map search apparatus and the like. It is.

[0002]

2. Description of the Related Art In a conventional image reduction processing method, even information including characters is reduced at the same reduction ratio as image information.

[0003] For example, a map search device will be described.
The map retrieval device prepares maps of different scales for the same area in advance in a plurality of types of systems, and, for example, when displaying a 1/10000 map on a monitor display screen, When it is desired to reduce the size to 1/2, a map of 1/20000 of the currently displayed area is read out and displayed.

At this time, when a map corresponding to the designated reduction ratio is not prepared in the system, the map is reduced and displayed. In this case, if character information is present, the reduction process is performed at the same reduction rate and reduction method including this character, so that the character portion is crushed in the reduction result, and as a result, There is a disadvantage that the readability is reduced.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to eliminate the drawbacks of the prior art, and it is an object of the present invention to make characters easy to see in a result of a reduction processing of an image including characters so as to improve readability. An object of the present invention is to provide an image reduction processing device that is improved.

[0006]

According to the present invention, there is provided an image reduction processing apparatus comprising: file means for storing image information corresponding to one display screen as an image plane; and character information associated with the image information as a character plane. An image reduction processing means for reading an image plane and performing a reduction process in accordance with a specified reduction ratio m; and reading out the character plane and reducing character information in accordance with a specified reduction ratio n (n> m). It is characterized by including character reduction processing means for performing reduction processing in accordance with the reduction ratio m with respect to arrangement on a plane, and combining means for combining outputs of the two reduction processing means with each other.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a system block diagram of an embodiment of the present invention. The display information is compressed and stored in the code storage unit (file medium such as a magnetic disk or an optical disk) 1. The information in this case includes character information accompanying the image information in addition to the image information, and is, for example, map information.

In the map information, information corresponding to one display screen is stored as one image plane A, and character information accompanying this image information is stored as one character plane B. In this case, one image plane A and one character plane B correspond to each other, and a map is finally drawn by overlapping the corresponding planes A and B on one display screen.

The decompression processing units 2 and 3 respectively include an image plane A,
It is provided corresponding to the character plane B, and expands the information of the corresponding plane by the specified magnification.

The image reduction processing section 4 performs reduction processing on the output image of the decompression processing section 2 in accordance with the designated reduction rate m. The character reduction processing unit 5 reduces only information relating to characters in the output information of the decompression processing unit 3 by a designated reduction ratio n (n> m), and also determines the size of the plane B of the character and the size of each character in the plane. Both positions are reduced by the image reduction rate m.

The image synthesizing unit 6 performs a logical OR synthesis of the processing outputs from the reduction units 4 and 5 and outputs the result to the display unit 7.

In such a configuration, the operation of FIG. 1 will be described with reference to an example of a processing process of FIG. When the image reduction ratio m = 1/2 and the character reduction ratio n = 3/4, the decompression processing unit 2,
In the case of No. 3, since the decompression magnification is not specified, the corresponding planes A and B as the magnification 1 are read from the file 1 as they are and are derived to the corresponding reduction processing units 4 and 5, respectively.

In the image reduction processing section 4, the designated reduction ratio m = 1 /
2, the size of the plane A is reduced to 1/2, as in the image of C shown in FIG. In this example, the number of pixels after processing is 1/2 (W × L) compared to the number of pixels W × L before processing.
L).

In the processing of the character plane B by the character reduction processing section 5, first, the size of the plane B is reduced according to the same m = 1/2 as the image reduction rate, and the size of the character itself is specified by the designated reduction rate n. = 3/4.

More specifically, only the character string indicated by the dotted line of the plane B in FIG. 2 is extracted. The method of extracting this character string is as follows. This is performed by a method such as specifying characters. The coordinates P (x, y) of the center point of the extracted character string are obtained.

At this time, since the size of the character plane B is reduced at the reduction rate m = 1/2, the center position of the character string as a result of the character plane reduction is Q (x / x) as shown in FIG. Two
, Y / 2). On the other hand, since the character itself is reduced to 3/4, a reduced character plane D in which the character reduced to 3/4 is arranged at the in-plane position Q as shown in D is obtained.

The processing planes C and D are combined by the synthesis processing unit 6
To obtain a composite plane E, which is displayed on the display unit 7.

[0019]

As described above, according to the present invention, the character information and the image information are processed as independent planes, and the image plane and the character plane are reduced separately. In addition, the reduction ratio of the character information can be set to be higher than that of the image information, so that there is an effect that the image can be reduced and displayed without lowering the legibility of the character.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram illustrating a process of an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Code storage part (file) 2, 3 Decompression processing part 4 Image reduction processing part 5 Character reduction processing part 6 Image synthesis processing part 7 Display part

──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. ⁷ Identification code FI G09G 5/40 G06F 15/40 530M (56) References JP-A-63-116187 (JP, A) JP-A-63-187288 ( JP, A) JP-A-1-219516 (JP, A) JP-A-63-148378 (JP, A) JP-A-62-236077 (JP, A) JP-A-3-96985 (JP, A) Hei 2-196275 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G06T 1/00 G06T 3/40 G09B 29/00 G01C 21/00 G06F 17/30 Patent file (PATOLIS) JICST file (JOIS)

Claims (1)

(57) [Claims] 1. File means for individually storing image information corresponding to one display screen as an image plane and character information accompanying the image information as a character plane, respectively.
An image reduction processing means for reading the image plane and performing a reduction process in accordance with a specified reduction ratio m; and reading the character plane and reducing character information in accordance with a specified reduction ratio n (n> m), An image processing apparatus, comprising: character reduction processing means for performing reduction processing according to the reduction ratio m with respect to the arrangement on the plane; and combining means for combining outputs of the two reduction processing means with each other.