JPH0771304B2 - Still image processing display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention corrects a still image during display of a still image by a television interlaced scanning method to make the flicker of the still image inconspicuous, and The present invention relates to a still image processing display device capable of faithfully reproducing an uncorrected still image when copying.

(Prior art) Conventionally, CRT is used for image display by a television system.
The interlaced scanning method (interlaced scanning method) is adopted when displaying the screen on the. As already known, in the image display by the television of the NTSC system, one frame is composed of 525 horizontal scanning lines, and one frame 1 is displayed in 1/30 second as shown in FIG.
252. An odd field consisting of an odd number of 252.5 odd scan lines (see the solid line in Figure 13) every 1 / 60th of a second.
An interlaced scanning method is adopted in which even-numbered fields consisting of five even-numbered scanning lines (see the broken line in FIG. 13) are alternately displayed.

According to this interlaced scanning method, the number of screens per second is
Even if there are 30 images, 60 images per second can be visually perceived, which has the advantage of making the flicker sensation inconspicuous.

(Problems to be Solved by the Invention) However, the interlaced scanning method described above is advantageous for making the flicker of the screen less noticeable for moving images with moving images, but it is a CD-ROM or a CD-ROM. In the case of a still image display in which a static image is displayed using a data recording medium such as I, the flicker is visually displayed even if it seems that 60 images are displayed per second. Since it is unavoidable, it is easy to feel the flicker especially on the horizontal contour line. The fourteenth is a diagram for explaining a portion susceptible to the flicker, and it is assumed that a still image figure 3 having, for example, a square frame shape is displayed on the screen 2 as a still image. In this still image figure 3, the shaded area is assumed to have a high density. In such a case, if the contrast is high, particularly the still image portions forming the horizontal contour lines 4, 4, 4 ', 4'are easily flickered.

As a television display method for making the flicker at the time of displaying a still image inconspicuous, there is an EDTV method that simultaneously displays an odd field made up of odd scan lines and an even field made up of even scan lines. This EDTV
Since the system requires a frame memory, the entire TV receiver is expensive, and unlike conventional home-use NTSC TV receivers, the EDTV requires a dedicated TV receiver.

Therefore, it is possible to modify the still image when displaying the still image.However, if you modify the still image, the original unmodified still image cannot be copied and the original still image is deleted. The inconvenience occurs that a faithful copy cannot be obtained. In particular, when a part of the still image is corrected so that the flicker is less noticeable, the corrected still image part is blurred during copying.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an uncorrected still image when a hard copy of a still image is performed even when a still image is corrected and an image is displayed. It is an object of the present invention to provide a still image processing display device capable of obtaining a copy faithful to an image.

(Means for Solving the Problem) In order to achieve the above-mentioned object, the manual still image processing and display device according to claim 1 of the present invention has unmodified still image data for constructing an entire unmodified still image. An uncorrected still image data storage means for storing the still image, a still image display means for displaying a still image based on the uncorrected still image data called via the display storage control means for each pixel, and the still image display Corresponding to the still image portion included in the correction required area, and the correction required area designating means for manually designating the still image portion displayed in the means as a correction required area in which flicker is felt as the correction required area. The density data of the still image data to be processed is averaged for each pixel using the density data of neighboring pixels in all directions surrounding the pixel so that the flicker of the image becomes inconspicuous, and the correction is required. The corrected density data is obtained for each pixel in the area, the still image portion constructed from the still image data including the corrected density data is replaced with the still image portion before correction through the display control means, and the display control means is provided. Averaging processing means for displaying the still image corrected in the above, corrected still image data storing means for storing corrected still image data for constructing the entire corrected still image after correction, and still image hard copy means And the still image display means, and outputs the uncorrected still image data stored in the uncorrected storage means to the hard copy means in response to the still image copy command. Selection output means for outputting the corrected still image data stored in the correction storage means to the still image display means.

In order to achieve the above-mentioned object, the automatic still image processing and display device according to claim 2 of the present invention is an unmodified still image for storing unmodified still image data that constitutes an entire unmodified still image. A data storage means, a still image display means for displaying a still image based on still image data called via the display storage control means for each pixel, and a flicker for correction of the still image displayed on the still image display means. An automatic extraction means for automatically extracting a still image portion where an image is felt as an extracted still image requiring modification, and density data of still image data corresponding to the extracted still image, for each pixel. An averaging process is performed by using density data of pixels in the vicinity in all directions so that the flicker feeling of the image becomes inconspicuous, corrected density data is obtained for each pixel of the extracted still image, and a still image including the corrected density data is obtained. Data? A still image portion constructed from the above is replaced with a still image portion before correction via the display control means, and averaging processing means for displaying the corrected still image on the display control means; Connected to the corrected still image data storage unit that stores the corrected still image data that constructs the entire still image, the corrected still image data storage unit that stores the corrected still image data, and the still image hard copy unit and the still image display unit. The uncorrected still image data stored in the uncorrected still image data storage means to the hard copy means, and the corrected still image data stored in the corrected still image data storage means in response to a still image display command. Selective output means for outputting data to the still image display means, and.

(Operation) According to the configuration of claim 1 of the present invention, a still image portion in which flicker of an image is felt is designated as a correction required area. For the density data of the still image data corresponding to the still image portion included in the correction required area, the flicker of the image becomes inconspicuous by using the density data of the neighboring pixels in all directions surrounding each pixel. The density averaging process is performed as described above. Then, by this density averaging process, the corrected density data is obtained for each pixel in the correction required area, and the still image portion constructed from the still image data including the corrected density data is displayed as a still image before correction via the display control means. The image portion is replaced and the corrected still image is displayed on the still image display means. If a flicker is felt in the still image that has been corrected, the method of density averaging processing is changed and correction is performed again. Then, the corrected density data of the still image portion in which the flicker of the corrected still image is less noticeable is replaced with the density data before the correction and stored in the corrected still image data storage means. In response to the still image copy command, the unmodified still image data is output from the unmodified still image data storage means to the hard copy means, and the unmodified still image is copied. Further, in response to a still image display command, the corrected still image data storage unit outputs the corrected still image data to the still image display unit.

According to the configuration of claim 2 of the present invention, the still image portion in which the flicker of the image is felt is automatically extracted as the extracted still image. The density data of the still image data corresponding to the extracted still image is density averaged so that the flicker of the image becomes inconspicuous by using the density data of the neighboring pixels in all directions surrounding each pixel for each pixel. To be done. Then, the corrected density data is obtained for each pixel of the extracted still image by this density averaging process, and the still image portion constructed from the still image data including the corrected density data is displayed on the still image before correction via the display control means. The still image is replaced with a portion and the still image control means displays the modified still image. If a flicker is felt in the still image that has been corrected, the method of density averaging processing is changed and correction is performed again. Then, the corrected density data of the still image portion in which the flicker of the corrected still image is less noticeable is replaced with the density data before the correction and is stored in the corrected still image data storage means. In response to the still image copy command, the unmodified still image data storage means outputs the unmodified still image copy to the hard copy means, and the unmodified still image is copied. Further, in response to a still image display command, the corrected still image data storage unit outputs the corrected still image data to the still image display unit.

(Embodiment) An embodiment of a still image processing display device according to the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic diagram showing the overall configuration of a still image processing display device according to claims 1 and 2 of the present invention. In FIG. 1, reference numeral 10 is a flat bed scanner and reference numeral 11 is a drum scanner. The flat bed scanner 10 and the drum scanner 11 function as an image input means for reading a still image figure drawn on a document (not shown). The still image figure is converted into digital still image data, and the host CPU 1
Entered in 2. The host CPU 12 has a function as a display storage control unit and various processing functions. On the screen 14 of the CRT 13 of the host CPU 12, an instruction menu and other instructions are displayed.

The digital still image data is stored for each pixel by using the digitizer 15 or the mouse 16 and instructing a menu to be stored in the hard disk 17 as the unmodified still image data storage means for constructing the entire unmodified still image. Further, the digital still image data stored in the uncorrected still image data storage means is called by the host CPU 12 for each pixel according to the instruction, transferred to the frame buffer 19 as a part of the display storage control means, and the still image is stored. Is displayed on the television receiver 20 (CRT) as a still image display means. In addition, when referring to still image data, in addition to density data that means the depth of color, chromaticity data necessary for image display, etc. are included.
When referring to a still image figure, it also means a character, figure, code or the like.

Here, it is assumed that a simple still picture figure 3 is displayed on the screen 21 of the television receiver 20 as shown in FIG.
Here, the shaded area has a higher density than other screen areas (and therefore has a lower brightness), and the other screen areas have a lighter density (and therefore higher brightness), and the contrast on the contour line is higher. It should be expensive. In such a case, when displaying a still image on the television receiver 20 by the interlaced scanning method, flicker is likely to be felt particularly in the still image portions of the horizontal contour lines 4 and 4 '.

Now, suppose that a flicker is felt in the still image portion surrounded by the two-dot chain lines frames 22 and 23 in the still image figure 3. Where the frame
The part surrounded by 23 corresponds to the outline part of the vertical part, but the outline part in the vertical direction may also flicker. In such a case, the digitizer 15 or the mouse 16 is used to specify the still image portion as a correction-needed area that requires correction. The digitizer 15 on screen 21
Alternatively, a still image portion designated as a correction-needed area by an instruction using the mouse 16 is displayed with a frame line cursor. Therefore, the digitizer 15 or the mouse 16 functions as a correction required area designating means for manually designating the still image portion where the flicker of the still image displayed on the still image display means is felt together with the host CPU 12 as the correction required area requiring correction. To do. Note that it is desirable to specify the correction-needed area, including a few still image parts where flicker is not felt, in order to make flicker inconspicuous as much as possible.

According to the instruction, the host CPU 12 calls the density data of the still image data corresponding to the still image portions 24 and 25 included in the correction required area from the storage means for each pixel. Then, the host CPU 12 performs density averaging processing for each pixel using density data of neighboring pixels in all directions surrounding the pixel so that the flicker of the image becomes inconspicuous. Now ij
The density data of the ij-th pixel is assumed to be X _{i, j} (see FIG. 3), assuming that the density data of the -th pixel is to be modified. When performing the averaging process of the density data X _{i, j} of the ij-th pixel, the density data X _{i-1, j-1} , X _{i-1, j of the} eight neighboring pixels surrounding the ij-th pixel are convenient. , X _{i-1, j + 1} , X _{i, j-1} , X _{i, j + 1} , X
_{i + 1, j-1} , X _{i + 1, j + 1} and X _{i + 1, j + 1} are used. And host C
PU12 performs calculation shown by the following formula in order to obtain a modified density data X _'ij by using an arithmetic mask shown in the density data and the fourth diagram of pixels in the neighborhood.

X ′ _{i, j} = (X _{i-1, j-1} + X _{i-1, j} + X _{i-1, j + 1} + X _{i, j-1} + X _{i, j} + X
_{i, j + 1} + X _{i + 1, j-1} + X _{i + 1, j + 1} + X _{i + 1, j + 1} ) / 9 The above operation simply calculates the density data of 9 pixels. Averaged, weighting factor 1/9 for each pixel
Is. In this way, the corrected density data _{X'i, j} (see FIG. 5) for the ij-th pixel is obtained. The corrected density data is obtained for all the pixels in the correction required area. It should be noted that in FIG. 5, the modified density data of the pixels in the vicinity of the ij-th pixel are also shown by adding a symbol '.
The still image portion constructed from the still image data including the obtained corrected density data is called up by the television receiver 20 via the host CPU 12 which functions as a display storage control means, and is replaced with the still image portion before the correction. The corrected still image is displayed on the receiver 20. When such density averaging processing is performed, the contrast between the still image portion where the flicker is felt and the still image portion adjacent thereto is relatively low, so that the flicker becomes inconspicuous. Therefore, the host CPU1
2 uses the density data of the still image data corresponding to the still image portion included in the correction-needed area for each pixel to determine the flicker of the image by using the density data of neighboring pixels in all directions surrounding the pixel. Averaging process to make it inconspicuous,
Correction density data is obtained for each pixel in the correction required area, and the still image portion constructed from the still image data including the correction density data is replaced with the still image portion before correction through the display control means to display a still image. It also functions as averaging processing means for displaying a still image whose means has been modified.

The corrected density data for each pixel is replaced with the uncorrected density data stored in the uncorrected still image data storage unit to store the corrected still image data for constructing the entire corrected still image. Although it is finally stored in the floppy disk 18 as the corrected still image data storage means, if flicker is felt even when the corrected still image is viewed, another method is required to change the averaging method. The corrected density data is obtained again using the calculation mask of. FIG. 6 shows an example of the operation mask,
The weighting coefficient of the density data of the pixel to be modified is set to be larger than the weighting coefficient of the density data of the pixels in the vicinity thereof. Using the calculation mask shown in FIG. 6, the corrected density data X ′ _{i, j of the} ij-th pixel
An arithmetic expression for obtaining is shown below.

X ′ _{i, j} = (X _{i-1, j-1} + X _{i-1, j} + X _{i-1, j + 1} + X _{i, j-1} + X _{i, j + 1} + X
_{i + 1, j-1} + X _{i + 1, j + 1} + X _{i + 1, j + 1} ) / 10 + X _{i, j} / 5 When the arithmetic mask shown in FIG. 6 is used, The density data of the pixel to be modified is less affected by the modification than the simple arithmetic mean shown in FIG.

In this way, only the pixel density data of the still image portion designated as the correction-required area is modified, and the modified pixel density data of only the designated still image portion is used. The pixel density data of is used as it is without any correction.

When digital still image data is already stored in the uncorrected still image data storage unit, it is not necessary to input an image from the image input unit, and the television receiver 20 is displayed via the host CPU 12 as the display storage control unit. Still images can be displayed. In the above embodiment, the floppy disk 18 is made to store the digital still image data for constructing the whole still image after correction, but in the end, the CD-
The corrected still image data may be recorded on a data recording medium such as ROM or CD-I.

The host CPU 12 is connected to the hard copy means 26, and when a still image copy command is given, the host CPU 12 selects the hard copy means 26. Then, the host CPU 12 causes the hard copy means 26 to output the uncorrected still image data stored in the hard disk 17. When the still image display command is given, the host CPU 12 outputs the corrected still image data stored in the floppy disk 18 to the television receiver 20. Therefore, the host CPU 12 is connected to the still image hard copy means and the still image display means, and in response to the still image copy command, the unmodified still image data stored in the unmodified still image data storage means is transferred to the hard copy means. It functions as selection output means for outputting and outputting corrected still image data to the still image display means in the correction storage means in response to a still image display command.

In the above embodiment, a simple-shaped still image figure has been described, but it will be apparent from the above description that it can be generalized to a complicated-shaped still image figure.

7 to 12 show an embodiment of the still image display processing apparatus according to claim 2 of the present invention. In this embodiment, the host CPU 12 functions as an automatic extracting means. Host CPU 12
When the operation mask for horizontal line emphasis shown in FIG. 7 is specified by using the digitizer 15 or the mouse 16 and the still image data corresponding to the still image figure 3 is arithmetically processed, as shown in FIG. The extracted still image 3A in which only the horizontal contour lines 4 and 4'are emphasized is automatically extracted and displayed. Further, when the arithmetic mask for vertical line emphasis shown in FIG. 8 is designated by using the digitizer 15 or the mouse 16 and the still image data corresponding to the still image figure 3 is arithmetically processed, a screen 21 is displayed as shown in FIG. , The extracted still image 3B in which only the vertical contour line is emphasized is automatically extracted and displayed. Furthermore, if the calculation mask for diagonal enhancement from left to right shown in FIG. 9 and the calculation mask for diagonal enhancement from right to left shown in FIG. 10 are used, the diagonal portion of the still image figure 3 is automatically extracted and displayed. To be done. Therefore, in this embodiment, the digitizer 15 or the mouse 16 automatically extracts the still image portion on which the flicker of the still image displayed on the display means together with the host CPU 12 is extracted as an extracted still image that needs correction. Function as.

The host CPU 12 then, for each pixel, based on the digital still image data corresponding to the automatically extracted extracted still image as described in the embodiment of the still image display processing device according to claims 1 and 2. Density averaging processing is performed so that the flicker of the image becomes inconspicuous by using the density data of pixels surrounding the pixel in all directions.

Therefore, in the case of the still image display processing device according to claim 3,
The host CPU 12 averages the density data in the still image data corresponding to the extracted still image so that the flicker of the image becomes inconspicuous by using the density data of the pixels in all directions surrounding the pixel for each pixel. Processing to obtain corrected density data for each pixel of the extracted still image, and the still image portion constructed from the still image data containing the corrected density data is replaced with the still image portion before correction via the display control means, It also functions as an averaging processing means for displaying the corrected still image on the still image display means.

(Advantages of the Invention) Since the image processing display device according to claim 1 or 2 of the present invention is configured as described above, a conventional television receiver is used when displaying a still image of the interlaced scanning system. The effect of being able to use it and making the flicker feeling less noticeable without impairing the sharpness of the whole image, while the still image part that has been corrected during hard copy is not blurred and uncorrected The effect is to faithfully reproduce the still image of.

[Brief description of drawings]

FIG. 1 is a schematic diagram of a still image processing and displaying apparatus according to the present invention, FIG. 2 is a diagram showing an example of a still image figure displayed on the screen, and FIG. 3 is a diagram showing density data of pixels before correction. 4 and 6 are diagrams showing an example of an operation mask, FIG. 5 is a diagram showing density data of pixels after correction, and FIGS. 7 to 10 are examples of operation masks used for automatic extraction. Figures 11, 11 and 12 are diagrams showing the shape of the extracted still image obtained by automatic extraction, Fig. 13 is an explanatory diagram of the display method by the interlaced scanning method, and Fig. 14 is an explanation of the flicker of the still image. FIG. 3 ... Still image figure 3A, 3B ... Extracted still image 4, 4 '... Horizontal contour line 10 ... Flat bed scanner (image input means) 11 ... Drum scanner (image input means) 12 ... Host CPU 15 …… Digitizer 16 …… Mouse 17 …… Hard disk (uncorrected still image data storage means) 18 …… Floppy disk (corrected still image data storage means) 20 …… TV receiver (CRT, still image display means) 25 …… Hard copy means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G06K 15/12 P H04N 5/91 B41J 3/00 Y

Claims (2)

[Claims] 1. An unmodified still image data storage means for storing unmodified still image data for constructing an entire unmodified still image, and an unmodified still image called for each pixel via a display storage control means. Still image display means for displaying a still image on the basis of image data, and a still image displayed on the still image display means is manually designated as a correction required area requiring correction of a still image portion where flicker is felt. A correction required area designating unit and density data of still image data corresponding to a still image portion included in the correction required area are used for each pixel by using density data of neighboring pixels in all directions surrounding the pixel. An averaging process is performed so that the flicker feeling of the image becomes inconspicuous, corrected density data is obtained for each pixel in the correction required area, and a still image portion constructed from still image data including the corrected density data. Averaging processing means for replacing the still image portion before correction via the display control means and displaying the corrected still image on the display control means; and correction stillness for constructing the entire corrected still image after correction Uncorrected still image data storage means for storing image data, connected to still image hard copy means and the still image display means, and uncorrected stored in the uncorrected storage means in response to a still image copy command. A still image having a still image data output to the hard copy means, and a selected output means for outputting the corrected still image data stored in the correction storage means to the still image display means in response to a still image display command. Processing display device. 2. Uncorrected still image data storage means for storing uncorrected still image data for constructing the entire uncorrected still image, and still image data called for each pixel via the display storage control means. Still image display means for displaying a still image based on the above, and automatic correction of the still image displayed on the still image display means to automatically extract a still image portion where flicker is felt as an extracted still image requiring correction By using the extraction means and the density data of the still image data corresponding to the extracted still image, the flicker of the image becomes inconspicuous by using the density data of the pixels in all directions surrounding the pixel for each pixel. Averaging processing is performed to obtain corrected density data for each pixel of the extracted still image, and a still image portion constructed from still image data including the corrected density data is used as a still image before correction via the display control means. part Averaging means for replacing and displaying the corrected still image on the display control means, and corrected still image for storing the corrected still image data for constructing the entire corrected still image after the correction The image data storage means, the still image hard copy means and the still image display means are connected, and the uncorrected still image data stored in the uncorrected still image data storage means is stored in the hard disk in response to a still image copy command. Selection output means for outputting to the still image display means the corrected still image data stored in the corrected still image data storage means in response to the still image display command. Still image processing display device.