JPH03250379A - High speed processing system for image processor - Google Patents

Abstract

PURPOSE:To perform the comparison arithmetic processing of the image information at a high speed by providing a comparison arithmetic part between a control part and an image memory part, comparing immediately an address designated by the control part in an image memory part with the color information read out of the image memory part, and outputting the result of the comparison to the control part. CONSTITUTION:A control part 2 designates an address of an image memory part 1 storing the desired image information to be compared and then reads out the color information. This color information is fetched to a comparison arithmetic part 4 for immediate comparison arithmetic. At the same time, the color information to be compared and set to a comparison register part 3 is fetched by the part 4. Thus the part 4 performs immediately the comparison between both color information. The result of the comparison is outputted to the part 2 as it is. Therefore the result of comparison is read out of the part 4 at the same time point when the part 2 usually designates and reads out the address of the part 1. Thus the comparison arithmetic processing of the image information is carried out at a high speed.

Description

[Detailed Description of the Invention] [Summary] Regarding an image processing device having an image memory section storing image information such as color information, and a control section that reads out the color information stored in the image memory section and performs image processing, With the demand for faster image processing, the purpose is to compare the color information stored in the image memory with the color information of the comparison target, and perform image processing such as filling in the corresponding area at high speed based on the comparison results. A comparison color register section that holds color information to be compared, an image memory section, and a control section are provided between the color information read out from the image memory section based on address information from the control section. , and a comparison calculation unit that takes in and compares the color information held in the comparison color register unit, and immediately outputs the compared result to the control unit.

[Industrial application field]

The present invention relates to an image processing device for color information stored in an image memory, and in particular, comparing color information in the image memory with color information to be compared involves determining an area surrounded by a certain color.
Necessary when performing fill-in, etc. The present invention relates to a high-speed processing method for an image processing device that performs comparison calculations at high speed.

[Conventional technology]

Conventionally, when comparing color information stored in an image memory with color information to be compared, as shown in FIG. It had a configuration consisting of 44.

As an operation of the apparatus, when comparing the color information stored in the image memory section 41 with the color information to be compared, the control section 42 first reads out the color information from the image memory section 41. Next, the read color information is sent to the comparison section 44, and then the comparison section 44 compares the color information with the color information to be compared. Subsequently, a plurality of cycles were required in which the control unit 42 read the comparison results in the comparison unit 44.

[Problem to be solved by the invention]

By the way, in the conventional comparison calculation, a cycle of sending data from the image memory to the comparison section and a cycle of reading out the calculation result are required, so there is a problem that the comparison calculation of color information requires a long time.

Therefore, the present invention has been made for the purpose of providing a method for speeding up the processing of image information comparison operations.

(Means for Solving the Problems) In order to solve the above-mentioned technical problems, the present invention, as shown in FIG. In an image processing apparatus having a control unit 2 that reads stored color information and performs image processing, a comparison color register unit 3 that holds color information to be compared;
Provided between the image memory section 1 and the control section 2, the control section 2
The color information read out from the image memory section 1 based on the address information from the image memory section 1 and the color information held in the comparison color register section 3 are fetched and compared, and the compared result is immediately output to the control section 2. It has a comparison calculation section 4.

[Effect]

The high-speed processing method of the image processing apparatus according to the present invention operates as follows. As shown in FIG. 1, first, the control unit 2
Specify the address of the image memory section 1 where the image information to be compared is stored and read out the color information. Subsequently, the read color information is directly taken into the comparison calculation section 4 for comparison calculation. At the same time, the comparison calculation section 4 has taken in the color information to be compared set in the comparison color register section 3, and immediately performs a comparison calculation with the color information taken in above. The comparison result is output to the control section 2 as is.

Therefore, the comparison result is read out from the comparison operation section 4 at the same time as when the control section 2 normally specifies and reads out the address of the image memory section 1, and the desired comparison operation can be processed in only one read cycle. finish.

〔Example〕

Next, examples of the present invention will be described.

FIG. 2 is a block diagram according to the embodiment. The image memory section 2 has four planes 2 each stored separately for each color (the unit of memory for each color is called a "plane").
1a, 21b, 21c.

21d. Also, the addresses of each plane overlap each other, and a - address causes all the planes to
Data related to the same coordinates 1a, 21b, 21c, and 21d can be accessed simultaneously. The comparison calculator 24a includes four planes 21a, 21b, 21c, and 21c of the image memory section 21.
The color information stored in 21d and the color information held in the comparison color register section 23 are taken in and a comparison operation is performed. The comparison color register unit 23 instructs the selector unit 24b to hold the color information to be compared and to indicate whether or not to use the comparison calculator 24a. Here, when the comparator 24a is not used, the data read from the image memory unit 21 is sent as is to the control unit 22, and when the comparator 24a is used, the comparison result in the comparator 24a is controlled. The information is sent to Department 22. The selector section 24b selects either the data from the image memory section 21 or the data from the comparator 24a based on the control signal from the comparison color register section 23, and sends it to the control section 22. Here, the comparison calculation unit 24a and the selector unit 24b correspond to the comparison calculation unit 4. Control part 2
In step 2, image processing is performed based on the comparison result of the comparison calculator 24a.

Next, the operation will be explained. This image processing device sequentially reads the image data stored in the image memory section 2, compares and calculates the color information included in the data and the color information to be compared, and performs processing such as rewriting the image data based on the result. It is something to do. As shown in FIG. 2, first, the control unit 22 specifies the address of the image memory unit 21 in which color information is stored, and all planes 21a, 2 of the specified address are
The color information of 1b, 21C, and 21d is taken into the comparison calculator 24a. Next, in the comparison calculator 24a, a comparison operation is performed with the color information of the comparison target taken in from the comparison color register section 23, and the comparison result is sent from the comparison calculator 24a to the control section 22 via the selector section 24b. (However, the control signal from the comparison color register section 23 is
(If input from 4a is selected). Therefore, the comparison result in the comparison calculator 24a is read out at the timing when the control unit 22 normally reads out the image memory 21. Therefore, a comparison calculation result can be captured in one read cycle, and image processing can be performed at high speed.

Next, details of the comparison calculator 24a will be explained based on FIG. The image memory section 21 has four planes 21a, 2
It is composed of 1b, 21c, and 21d, and 4-brane 21a at the - address.

21b, 21c, and 21d can be accessed simultaneously, and the word lengths are all 16 bits. Here, the comparison color register section 23 is set to 1 for the image memory section 21 having a 4-plane configuration.
The circuit of the comparator 24a in the case where the comparator 24a has two components is shown.

An EOR (exclusive OR) circuit 24a1 is provided for each plane and can perform calculations for one word length of 16 bits at the same time.

A NOR (NOR) circuit 24a2 is provided for each bit of a word length of 16 bits, and performs a calculation to determine whether all four colors related to the same coordinates of each of the four branes are equal.

The colors of pixels at the same coordinates in an image can be expressed by a combination of four colors of each plane (16 colors in total), and when all four colors are equal, the colors match. Furthermore, the data output from the image memory section 21 has a word length of 16 bits per l-brane, and 4 branes can be read out simultaneously, so a total of 64 bits can be output.
This is output. They are sent to the EOR circuit 24a1 for each plane. The comparison color register section 23 has a 4-bit configuration because the image memory section 21 has 4 branes, and can set up to 16 colors. The data sent from the image memory section 21 to the EOR circuit 24a1 is divided into planes, and in each EOR circuit 24a1, the -word length of 16 bits is simultaneously subjected to an EOR operation with the comparison target color held in the comparison color register section 23. The output side of the EOR circuit 24a1 becomes LOW level when the comparison results are equal.

The calculation result of the EOR circuit 24a1 is sent to the next NOR circuit 24.
The data is input to a2 in units of bits of 16 bits each word, and arithmetic operations are performed. In the NOR circuit 24a2, the calculation result is HIGH only when the colors of all four branes are equal.
Becomes H level. The comparison result is sent to the control section 22.

Furthermore, in order to increase the number of colors to be compared at the same time, it is possible to process by adding the comparison color register unit 23 and the comparison calculator 24a for each comparison color.

(Effects of the Invention) As explained above, in the present invention, a comparison operation section is provided between the control section and the image memory section, and when the control section specifies the address of the image memory section, the data is read from the image memory section. The color information thus obtained is taken into the comparison calculation section, and a comparison calculation is immediately performed and the result is output to the control section.

Therefore, according to the present invention, at the time when the control section reads out the image memory section, the control section receives the result of the comparison operation with the color information read out from the image memory section. The overall processing speed can be increased.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention, FIG. 2 is a block diagram of an embodiment, FIG. 3 is a detailed diagram of a comparison calculation section, and FIG. 4 is a block diagram of a conventional example. 1.21 (21a, 21b, 21c, 21d)...
・Image memory unit (brain) 2.22...Control unit 3.33-...Comparison color register unit 4.24...Comparison calculation unit 24 (24a, 24b) = Comparison calculation unit (comparison calculation unit,
selector part)

Claims (2)

[Claims] (1) Image memory section in which image information such as color information is stored (
1) and a control unit (2) that reads out color information stored in the image memory unit (1) and performs image processing. )
and, provided between the image memory section (1) and the control section (2),
The color information read out from the image memory section (1) based on the address information from the control section (2) and the color information held in the comparison color register section (3) are fetched and compared, and the A high-speed processing method for an image processing apparatus, comprising a comparison calculation section (4) that immediately outputs a result to a control section (2). (2) Only when there is an instruction from the control unit (2), the comparison operation unit (4) performs a comparison operation and the result is sent to the control unit (
2), and if there is no instruction from the control unit (2), the comparison calculation unit (4) outputs the color information read from the image memory unit (1) as is to the control unit (2). A high-speed processing method for an image processing apparatus according to claim 1.