JPS63111582A - Image processor - Google Patents

Abstract

PURPOSE:To perform plural kinds of image processing by rewriting the contents of a lock-up table LUT as well as control data serving as the address of the LUT. CONSTITUTION:Image data is stored in an image memory 7 via an A/D converter 4 and at the same time given to a monitor 14 via a D/A converter 13 for display. A control memory 8 stores control information in response to the area of the image data. A memory reading part 10 reads out said control information and the image data on the memory 7 and inputs them into an LUT9. Then the part 10 reads the conversion information out of the LUT9 and converts the image data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image processing device that converts image data using a lookup table and outputs the converted image data.

[Prior Art] Conventionally, the output of an image memory is converted using a look-up table (hereinafter abbreviated as LUT), such as γ conversion,
Image processing devices that perform various types of image processing such as filling in and binarizing have been proposed. However, with these devices, it is not possible to specify a region and perform image processing such as gamma conversion and filling for each region.

[Problems to be Solved by the Invention] The present invention has been made in view of the above-mentioned conventional examples, and an object of the present invention is to provide an image processing device that can perform different image processing for each predetermined area of image data. shall be.

[Means for Solving the Problems] In order to achieve the above object, the image processing apparatus of the present invention has the following configuration. That is, a storage means for inputting and storing image data, a display means for displaying the image data, a specifying means for specifying an area of the image data, a storage means for storing control information corresponding to the area, The storage device includes a reading device that simultaneously addresses and reads out the storage device and the storage device, and a writing device that writes conversion information corresponding to the area into a table memory.

[Operations] In the above configuration, the reading means operates to read control information and image data, manually read conversion information from the table memory, and convert the image data.

[Embodiments] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of image processing device (Figure 1)] FIG. 1 is a block diagram of an image processing apparatus according to this embodiment.

In the figure, 1 is a CPU that controls the entire device, 2 is a ROM that stores CPU control programs and data, and 3 is a CPU.
This is a RAM used as a UI work area. 4
is an A/D converter with a multiplexer, which switches and inputs R (red), G (green), and B (blue) signals according to control signal 5 from the CPUI, and converts each into 8-bit digital image data. . 6 is a video bus, and 7 is an image memory, which includes three frame memories for each color (RGB).

A control memory 8, which will be described later, has the same memory space as one frame memory, and outputs 4-bit data as an address signal for the LUT 9.

Reference numeral 10 denotes a memory reading unit that controls reading of the image memory 7 and the control memory 8, and starts operating in accordance with a control signal from the CPUI. Reference numeral 12 denotes an I10 interface section which performs input/output with a digitizer which is a coordinate manual device, a keyboard for inputting various commands, a disk device for storing and reading image data, and the like. 13 is a D/A converter which converts the 8-bit digital image data on the video bus 6 into an analog signal and displays it on the monitor disk play 14. The monitor display 14 is, for example, 640X4.
It is a color display that can display 80 dots.

[Description of LUT (FIG. 2)] FIG. 2 is a block diagram of the LUT 9 of this embodiment, and parts common to those in FIG. 1 are indicated by the same symbols.

26 to 28 are LUTRAMs for R, G, and B, respectively.
As address signals, 8-bit image data of each color and 4-bit control data 20. A total of 12 bits are manually generated 4
This is a byte of RAM.

Now, for example, when image data from the image memory (R) is being read under the control of the memory reading section 10,
The address data outputted from the memory reading section 10 to the image memory (R) is inputted as is as an address in the control memory 8, and a 12-bit address is inputted into the R RAM 26. Also, at this time, only the R RAM 26 is selected by the control signal 24 from the memory reading section 10. In this way, the red (R) image data is converted by the LUT 9 and output. In addition, each table RAM26~
28 has a configuration that can be rewritten by the CPU via a path 29.

[Operation Description (Figures 3 to 5) Figure 3 is a flowchart of the image processing operation of this embodiment.
This program is stored in ROM2.

First, in step S1, image data is input and stored in the image memory 7. This converts the RGB analog image signal into A
The data may be digitized by the /D converter 4 and input manually, or may be input from an external storage device such as a disk via the I10 interface section 12.

In step S2, the image is displayed on the monitor television 14, and in step S3, the area and color of the image are specified on the monitor screen using a digitizer, keyboard, or the like.

FIG. 4 shows a specific example of image data, in which a car is displayed with mountains in the background. Now, for example, specify the body part 30, window part 31, and tire part 32 of the car using the digitizer, and change the color of each part, for example, red for the car body, and set the tire part 32 so that the mountain range can be seen through the window part 31.
Consider the case where the color is specified as black.

Based on this designation, for example, as shown in FIG.
8 and the contents of RAM 26 to 2 in step S4.
8, the contents of the control memory 8 are rewritten in step S5.

That is, in the area of the control memory 8 corresponding to the window portion 31, bit 3 is set to 1''. At the address where bit 3 of the control data 20 of the LUTRAMs 26 to 28 is set to 1'',
Writes 172 pieces of 8-bit R, G, and B data input as an address. Also, bit 2 of the area of the control memory 8 corresponding to the vehicle body part 30 is set to "1", and the RAM
For the corresponding address of 26, enter “255”, and for the other R
Write "0" to the corresponding address of AM27.28. Further, in the control memory 8 corresponding to the tire portion 32, bit 1 of that area is set to 1'', and data of (8-bit image data (8-bit address) + 255)/2 is written to the corresponding addresses of the RAMs 26 to 28. Note that "0" is sequentially stored in other areas of the control memory 8, and values equal to the input value of the 8-bit image data are sequentially stored in other areas of the RAMs 26-28.

After the above operation, the process proceeds to step S6, and by instructing the memory reading unit 10 to read the image memory 7 and the control memory 8, the tire portion 32 where bit 1 of the control data 20 is "1" is black, and the control data 20 bit 2 is “1”
The vehicle body part 30 with "" becomes red, and the background color of the window part 31 with bit 3 "1" becomes whitish, giving an atmosphere where the mountain can be seen through the window.

As explained above, the displayed image can be changed in various ways without changing the image data in the image memory. Furthermore, if necessary, it is also possible to write the converted image data into the image memory 7 via the video bus 6.

Further, the modification of image data is not limited to this embodiment, and by rewriting the LUTRAM, image processing such as γ conversion, negative/positive conversion, and multi-value conversion can be executed.

As explained above, according to this embodiment, by rewriting the control data serving as the address of the LUT and the contents of the LUT, it is possible to perform a plurality of types of image processing.

[Effects of the Invention] As described above, according to the present invention, there is an effect that various image processing can be performed for each predetermined area of image data.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the image processing device of this embodiment, Fig. 2 is a block diagram of a lookup table of this embodiment, Fig. 3 is a flowchart of image processing of this embodiment, and Fig. 4 is a diagram of image data. A diagram showing a specific example, FIG. 5, is a diagram showing the relationship between control data and the contents of LUTRAM. In the figure, 1...CPtJ, 2...ROM, 3...R
A.M. 4... A/DyR converter, 7... Image memory, 8
... Control memory, 9... Lookup table (L
UT), 10...Memory reading unit, 12...I10 interface unit, 13...D/A converter, 14...
Monitor display, 26-28...LUTRAM,
30...Vehicle body part, 31...Window part, 32...Tire part. Patent applicant Canon Co., Ltd. Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] storage means for inputting and storing image data; display means for displaying the image data; designation means for specifying an area for the image data; storage means for storing control information corresponding to the area; comprising: reading means for simultaneously addressing and reading out the means and the storage means; and writing means for writing conversion information corresponding to the area into a table memory;
An image processing apparatus characterized in that the image data is converted by reading out the conversion information from the table memory based on the control information and the image data read by the reading means.