JP2525495B2 - Original image restoration processing method of image processing system - Google Patents

Description

DETAILED DESCRIPTION [Table of Contents] Outline Industrial field of application Conventional technology (Fig. 7) Problem to be solved by the invention Means for solving the problem (Fig. 1) Action Example (a) One Description of Embodiments (FIGS. 2 to 5) (b) Description of Other Embodiments (FIG. 6) [Effect of the Invention] [Outline] An image on the display screen is designated by the input unit to process the image. Regarding an original image restoration processing method for performing restoration processing to an original image in an image processing system, an object is to improve the operability of the processing processing by partially and gradually restoring the original image during processing to the original image. The display unit for displaying an image, the input unit for designating an arbitrary area of the display unit, the image memory for storing the original image and the processed image, and the image processing for the designated area of the input unit are performed. A control unit for displaying an image on the display unit, In the image processing system in which the display image is processed according to the instruction of the input unit, the control unit obtains a difference image between the original image and the processed image according to the restoration instruction from the input unit, and calculates the difference image. Image is weighted by the ratio of the weight pattern,
The weighted difference image and the processed image are added and reflected on the added image.

[Industrial applications]

The present invention relates to an original image restoration processing method for performing restoration processing on an original image in an image processing system that processes an image by instructing an image on a display screen with an input unit.

An image processing system, for example, a system called a painting system displays digital image data input by an image input device such as a color scanner on a color display, and uses a pointing device such as a mouse or a tablet, It is used for interactively processing and modifying color gloss images.

In such an image processing system, it is necessary to restore the processed image to the original image when the color, depth, etc. of the processed image do not match the user's will, and it is desired to have good operability. .

[Conventional technology]

 FIG. 7 is an explanatory diagram of the prior art.

In the painting system, for example, as shown in the display screen DP of FIG. 7, assuming that there are two clouds floating in the mountain, and adding a white cloud over the mountain as shown by the dotted line in the figure. And is disclosed in, for example, JP-A-1-48094.

In such a case, the processing target position is specified by the pointing device, and the processing is performed so that the specified color gradually approaches the specified color according to the distance with the point as the center. is called.

In such a conventional system, in the case of canceling during such processing or correction, the entire image is returned to the original image, or only the area (circle, rectangle etc.) designated by the mouse etc. is changed to the original image at once. Had returned.

Returning the entire image is used when the process is restarted from the beginning or when the process is stopped.

[Problems to be Solved by the Invention]

However, in the case of partial cancellation, there are many cases where the color density is too dark, so if you restore the original image at once,
There is a problem that it takes a lot of time to process and correct again.

Therefore, the present invention provides a raw image restoration processing method for an image processing system capable of improving the operability of the processing by partially and gradually restoring the image being processed to the original image. To aim.

[Means for solving the problem]

 FIG. 1 is a principle diagram of the present invention.

The present invention, as shown in FIG. 1 (A), includes a display unit 7 for displaying an image, an input unit 1 for designating an arbitrary area of the display unit 7, and an image memory for storing an original image and a processed image. Three
And a control unit 5 for processing a specified image in a specified area of the input unit 1, displaying an image on the display unit 7, and processing the display image according to an instruction from the input unit 1. In the image processing system, as shown in FIG. 1 (B), the control unit 5 obtains a difference image between the original image and the processed image in accordance with the restoration instruction from the input unit 1, and calculates the difference image. The image is weighted by the ratio of the weighted pattern, the weighted difference image and the processed image are added, and the result is reflected on the processed image.

[Action]

In the present invention, since the weight pattern is used for restoration, the original image of the proportion of the weight pattern is restored.

Therefore, since the restoration to the original image is performed in stages, the operator stops the restoration at the desired restoration stage, processes the image again,
If the correction is performed, a desired processed image can be obtained faster and the operability of the painting process is improved.

〔Example〕

(A) Description of an Embodiment FIG. 2 is a block diagram for an embodiment of the present invention, and FIG. 3 is a block diagram of a color mixing processing circuit having the configuration of FIG.

In the figure, the same components as those shown in FIG. 1 are designated by the same symbols.

The input unit 1 is an area specifying unit 1 such as a mouse or a tablet.
And a color designating means 2 including a dial for inputting density values of R, G and B colors.

The image memory 3 includes an original image memory 3a for R, G, and B colors that stores an original image, a processed image memory 3b for R, G, and B colors that stores a processed image, and its address generators 30, 31.
including.

The weight coefficient memory 4 stores the weight coefficient and has an address generator 40.

The control unit 5 is composed of a microprocessor (MPU), and comprises a control means 5a for controlling the whole and a color mixing processing circuit 5b for performing a color mixing calculation process.

The work memory 6 is used by the control means (hereinafter referred to as MPU) 5a and the like for performing restoration processing and the like.

The display unit 7 comprises a display memory 7a and a display means 7b such as a CRT for displaying the contents of the display memory 7a, and a menu area 70 is provided at the right end of the display area.

As shown in FIG. 3, the color mixing processing circuit 5b uses a differential image W2, a weighting pattern WP, a table 50 of the calculation result W3 (= −W2 × WP / 256), and an arithmetic operation, as shown in FIG. And an arithmetic unit (ALU) 51.

The paint processing operation according to this configuration is described in JP-A-1-4809.
Although it is publicly known from Japanese Patent Laid-Open No. 4 and the like and will not be described in detail, it will be briefly described below by taking an airbrush process as an example.

The area designating means 1 selects the airbrush processing from the menu area 70 of the display screen 7b, and the color designating means 2 designates the color of the processing area of the display (graphic) area.

The MPU 5a is a processed image memory 3b (or original image memory 3
The processing area S1 of a) is read out, the weighting pattern WP of the weighting coefficient memory 4 is read out, and it is sent together with the designated color C to the color mixing processing circuit 5b.

In the circuit 5b, when S1 ≧ C, S1 ′ = S1-WP, where S1 ′ <C is S1 ′
= C When S1 <C S1 ′ = S1 + WP However, when S1 ′> C, S1 ′
= C 'is performed. The above method treats the weight pattern WP as a value that brings it closer to the designated color.

Further, in the circuit 5b, S1 ′ = (C−S1) × WP / 255 + S1 is set, and WP is treated as a ratio of approaching, and the above process is repeated a plurality of times to approach the specified color.

In this way, the processed image S1 ′ is obtained, and the processing area S1 of the processed image memory 3b and the display memory 7a is rewritten in S1 ′.

By repeating this as needed, an airbrushed image having a desired darkness can be obtained.

FIG. 4 is a processing flow chart of one embodiment of the present invention, and FIG. 5 is an explanatory view of one embodiment of the present invention.

The menu area 70 of the display screen 7b by the area designating means 1
Specify the restoration process and specify the processing area of the display area.

The MPU 5a moves the designated processing area S1 of the processed image memory 3b to the work area W1 of the work memory 6.

The MPU 5a is the designated processing area S of the original image memory 3a.
2 is taken out and outputted to the color mixing processing circuit 5b together with the processing area S1 of the work area W1 of the work memory 6, and the color mixing processing circuit 5b (arithmetic circuit 51 thereof) performs W2 = S2-S1.
The difference image W2 is stored in the work area W2 of the work memory 6.

Next, the MPU 5a reads out the weight pattern WP used in the airbrush processing in the area of the weight coefficient memory 4, and the contents of the work area W2 of the work memory 6 and the weight pattern WP.
To the color mixing processing circuit 5b.

In the color mixing processing circuit 5b, W3 =-(W2 * WP / 255) is obtained from W2 and WP by the table 50 and stored in the work area W3 of the work memory 6.

Further, the MPU 5a is a work area W1 of the work memory 6.
(Processing area of processed image memory 3b) and work area W3 are sent to the color mixing processing circuit 5b, and the arithmetic circuit 51 sends S1 ′ = W1 + W3.
And the processing areas of the processed image memory 3b and the display memory 7a are rewritten with the calculation result S1 '.

Finally, when the end menu of the menu area 70 is instructed by the area designating means 1, the restoration processing is ended.

As a result, the weighted pattern portion processed image returns to the original image by one restoration process.

Therefore, if the restoration process is repeated, the processed image having a desired darkness or the like can be restored.

Therefore, rather than returning to the original image at once, it is possible to return to an image closer to the desired image, making subsequent processing operations easier,
Operability is improved.

(B) Description of Other Embodiments In the above-described embodiments, an example in which a processed image obtained by airbrushing an original image is gradually returned to the original image with a weighting pattern used in the airbrushing process has been described. Applicable.

 FIG. 6 is an explanatory view of another embodiment of the present invention.

The figure shows an example in which a house having a background (hatched portion in the figure) is superimposed (copied) on the original images of two mountains at the lower right.

In this case, the background of the stacked houses overlaps a part of the mountain, which makes it unnatural.

Therefore, similarly to the above, by gradually returning to the original image (mountain image) with a predetermined weight pattern, a harmonious processed image can be obtained.

For this reason, by performing the main restoration processing on the background area of the copied image, it is possible to interactively synthesize the information and the mouse information becomes unnecessary.

Further, although the color mixing processing circuit 5b is provided to perform the image calculation at high speed, it may be realized by the software of the MPU 5a.

Although the present invention has been described with reference to the embodiments, the present invention can be variously modified according to the gist of the present invention, and these modifications are not excluded from the present invention.

〔The invention's effect〕

As described above, according to the present invention, the processed image is gradually returned to the current image, so that the rework due to restoration is less than in the conventional case. The effect is that the desired processed image can be corrected immediately, which contributes to the improvement of operability in the painting system.

[Brief description of drawings]

 FIG. 1 is a principle diagram of the present invention, FIG. 2 is a configuration diagram for one embodiment of the present invention, FIG. 3 is a configuration diagram of main parts of a color mixing processing circuit of FIG. 2, and FIG. FIG. 5 is an explanatory view of an embodiment of the present invention, FIG. 6 is an explanatory view of another embodiment of the present invention, and FIG. 7 is an explanatory view of a conventional technique. In the figure, 1 ... input section, 3 ... image memory, 5 ... control section, 7 ... display section.

Claims (1)

(57) [Claims] 1. A display unit (7) for displaying an image, and an input unit (1) for designating an arbitrary area of the display unit (7).
An image memory (3) for storing the original image and the processed image, and a control unit (5) for performing the image processing specified in the area specified by the input unit (1), the display unit (7) In the image processing system, in which an image is displayed on the screen, and the display image is processed according to the instruction from the input unit (1), the control unit (5) is responsive to a restoration instruction from the input unit (1). A difference image is obtained between the original image and the processed image, the difference image is weighted at a weight pattern ratio, the weighted difference image and the processed image are added, and the difference image is reflected on the processed image. Image restoration processing method for an image processing system.