JPH0233675A - Picture processor - Google Patents

Abstract

PURPOSE:To change and correct original picture data with no change by storing the result obtained from an arithmetic operation performed with use of the output of a frame memory storing the picture data and the output of a mask memory into a look-up table. CONSTITUTION:The brush processing data received from an external CPU 11 is recorded into a brush memory 14 and added to the designated coordinates of a mask memory 15 via an addition circuit 16. Thus a process pattern is produced and a process function is recorded into a look-up memory 13 by the output received from the memory 15. The product obtained from the process function and the output data given from a frame memory 12 is equal to the output received from the memory 13. The memory 13 processes each picture element based on said function and displays the processing result on a display 17. Then the picture data is outputted again to the memory 12 based on the display contents of the display 17 in case the change and the correction are required to the picture data. While the different data is written and outputted from the memory 15, and the different output is obtained from both data.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image processing apparatus, for example, an image processing apparatus convenient for performing addition/correction processing on a digital image.

2. Description of the Related Art A so-called airbrush, as shown in FIG. 5, is known as an instrument for spraying liquid paint in the form of a mist to create shading tones. This airbrush is used for addition and correction processing in digital image processing, but conventionally, when performing such processing, local areas are processed using software on a digital image (original one) stored in a frame memory. The main thing is to
It was also processed using the hardware configuration shown in the figure.

This includes a CPUI that creates an original image, a frame memory 2 that stores and expands image data from the CPU 1,
A brush memory 3 that stores data for plan processing and processes (processes) the image data stored in frame memory 2 by outputting data for brush processing, and images output from frame memory 2. It consists of a display 4 for displaying data and a control section 5 for controlling each of the operating sections 2.3.4. Then, the created original image data is output from the CPUI and stored in the frame memory 2, while the stored image data is processed using data from the brush memory 3, and the result of this processing is The resulting image data is displayed on the display 4.

Furthermore, since high-speed processing is not possible with software processing, the content of the processing has been simplified and the amount of processing has been reduced. Specific processing contents for processing the local area include, for example, "blurring" which calculates the average of pixels in the local area, and airbrushing using area gradation as shown in Figure 5. There is.

Problems to be Solved by the Invention However, in such a conventional image processing device, brush processing is performed directly on the image data stored in the frame memory 2, so that the original data is be lost.

Therefore, if the brush processing is not sufficient, it is necessary to perform the brush processing again using other data in the brush memory 3, but in such a case, the original data will be lost as described above. Therefore, the original image data must be output again from the CPUI, which complicates processing and increases the time required for brush processing.

The present invention was made in view of these conventional problems, and its purpose is to make it possible to make changes and corrections many times without changing the original image data when performing additions and corrections on an image. An object of the present invention is to provide an image processing device that can perform the following steps.

Means for Solving the Problems In order to achieve the above object, the present invention has an image processing device that stores digital image data in a frame memory and then processes the image data based on a predetermined function. The gist of the present invention is to provide a look-up table, a brush memory, and a mask memory that stores the processing amount of image data stored in the look-amp table memory based on data from the brush memory.

The active frame memory output is operated on the output from the mask memory, and the operation result is stored in the lookup table memory. The data stored in this lookup key memory is then displayed on the display. If this display content is acceptable, a final processing command is issued, and additions and corrections by brush processing are completed. On the other hand, if the displayed content is not sufficient, instructions for addition or correction are issued again. Then, data for brush processing that is different from the previous one is output from the brush memory, the data in the mask memory is changed, and calculations are performed on the new mask memory output and frame memory output, and the results are looked up. It is stored in uptable memory and displayed on the display. Such operations are repeated until it is determined that the content displayed on the display is good, and after the judgment is made that it is good, a final processing command is issued and the additions and corrections are completed in the same way as described above.

Embodiment FIGS. 1 to 5 are diagrams showing an embodiment of the present invention. The image processing device according to this embodiment includes a CPU II that creates an original image, a frame memory 12 in which image data from the CPU 11 is stored and expanded, and a predetermined function for the image data output from the frame memory 12. A look-up table memory 13 that performs processing based on the data, and a frame memory 12 that stores data for brush processing.
A brush memory 14 that outputs data for brush processing on image data stored in the lookup memory 13, a mask memory 15 that stores the amount of processing of the image data stored in the lookup full memory 13, and a lookup table. It consists of an adding circuit 16 that changes the data of the mask memo 'J 15 based on the data of the memory 13 and the data of the brush memory 14, and a display 17 that displays the data processed by the look-up table memory 13 as an image. The brush/molly 14 stores an arbitrary brush shape and writes the processing amount into the mask memory 15.

The mask memory 15 corresponds to the frame memory 12 for each pixel, and stores the processing amount for each pixel of image data. A display 17 is connected to the lookup table memory 13, and a display 17 is connected to the lookup table memory 13.
The output image data from is now displayed.

The operation of the image processing apparatus having such a configuration will be explained.

First, data for brush processing (for example, the shape of the brush to be added or corrected) is stored in the brush memory 14 from the external CPU II.
is recorded. This data represents the amount of processing, that is, the amount of change, as shown in FIG. 2, and has a distribution as shown in the same figure. The data in the brush memory 14 is added to designated coordinates in the mask memory 15 through an adder circuit 16 to create a processing pattern. An example of the distribution of the added data in the mask memory 15 is shown in FIG. This changes the specified coordinates of the mask memory 15 to 28
This is a three-dimensional display of the contents when continuously moving to a point, using the density value as the height. When the processing pattern is written in the mask memory 15 in this manner, the processing function is recorded in the lookup table memory 13 based on the output from the mask memory 15. This processing function is a function determined by output data from the mask memory 15,
The output data from the frame memory 12 is DF(i), the output data from the mask memory city is DM(i), and the output data from the lookup table memo January 3 is DD(
i), then DD(i)-DF(i)・f (DM(
i) It can be expressed as

The relationships among the data in the lookup table memory 13 are shown in FIG. 4. In this figure, the Y axis is frame memory data DF(i)
The Y axis represents mask memory data DM(i), and the Z axis represents look amplifier table memory data DD(i). As is clear from this figure, when DF(i) is fixed constant, output data DD(i) varies linearly with DM(i), and when DM(1) is fixed constant, output data DD(i) changes linearly with DM(i). (i) changes linearly with DF(i). Then, the lookup table memory 13 performs processing for each pixel based on the above-mentioned functions,
The processing results are displayed on the display 17. and,
Looking at this display content, if it is determined that further additions or corrections to the image data are necessary, the image data is outputted from the frame memory 12 again, while different data is written to the mask memory 15. Another output data DD(i) is obtained by both data DF(i) and DM(i). By repeating these operations, the desired image can be obtained.

As described in detail, according to the present invention, the image processing device includes a mask memory corresponding to each pixel in the frame memory, and also functions the output data of the frame memory and the output data of the mask memory. Since a look-up full memory is provided to perform calculations and obtain output data, additions and corrections can be performed as many times as desired based on arbitrary data in the brush memory without processing or deforming the original image data in the frame memory. Therefore, there is no need to recreate the same original image data each time you add or modify one image data, and you can add to or modify digital images at high speed using a free brush pattern. can get.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an image processing apparatus according to the present invention, FIG. 2 is a diagram showing an example of the contents of the brush memory in the embodiment, and FIG. 3 is a diagram showing the contents of the mask memory in the embodiment. A diagram showing an example; FIG. 4 is a diagram diagrammatically showing an example of the calculation contents by the look-up square memory in the embodiment; FIG. 5 is a diagram showing an example of the shape of an airbrush used for adding and correcting images; FIG. 6 is a diagram showing an example of a conventional image processing device. 11...CPU, 12...Frame memory, 13.
... Lookup table memory, 14... Brush memory, 15... Mask memory, 16... Addition circuit, 17... Display.

Claims (1)

[Claims] A frame memory that stores image data, a look-up table memory that receives image data from the frame memory and processes the image based on a predetermined function, and a brush that stores data for brush processing. memory and data from this brush memory are input,
comprising a mask memory that stores the amount of processing of image data stored in the lookup table memory based on the input data, and a display that displays the data processed in the lookup table memory as an image;
calculating the frame memory output and the mask memory output in the look-up table memory, displaying the calculation result on a display, and changing the data in the mask memory by the brush memory output based on the display contents; An image processing device that adds and corrects images by repeating calculations between the frame memory output and the mask memory output.