JPS6217877A - Image forming device - Google Patents

Abstract

PURPOSE:To reduce the operating variable of picture element forming parts, to speed up picture element formation and to reduce the size of a device by outputting a writing address from a data collecting part to an image storing part. CONSTITUTION:The image buffers 21-23 consisting of N units execute the buffering of inputted luminance data and output luminance data 44 in accordance with a reading control signal 50. An image data collecting part 2 successively applies output permission for luminance data output to the N image buffers, and if luminance data waiting its output exists in the image buffers, and outputs a writing address 34 and a writing control signal 51 to an image storing part 1 in accordance with previously applied partial picture information, so that the luminance data of the partial picture obtained from respective picture element forming parts is written in the partial picture of the image storing part 1. At the end of the formation of all the partial pictures, the image formation of one picture is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image generation device comprising a plurality of pixel generation sections.

2 Page Conventional technology Image generation processing requires a large number of floating point operations to calculate the luminance data of one pixel, and in order to generate one screen image in a short time, a pixel generation unit equipped with a high-speed arithmetic unit is required. It is necessary to use many . Pixel data calculated by a large number of pixel generation units are collected in one image storage unit and configured as one screen of image data. FIG. 2 shows an example of a conventional image generation device.

The details of the prior art will be described below with reference to FIG.

N pixel generation units 11°12. that calculate the brightness of each pixel.
13 stores the luminance data 41, 42, 43 of each pixel of a partial screen that does not overlap with each other and the write address 31, 32, 33 of each pixel on the screen, that is, the write address 31, 32, 33 to the image storage unit 1, respectively, to an image buffer 21. Output without waiting time on 22.23.

The image buffers 21, 22, and 23 buffer write addresses and brightness data, and only one image buffer designated by the read control signal from the image data collection unit 2 outputs the write address 34 and brightness data. It becomes possible to output the write address and brightness data to 44, and the image (
・If there is data to be output in the i/i' field, the 10 pixels of the image storage unit designated by the V-to-write address 34 are set to have a luminance of -7'- according to the write control signal 51 from the image data collection unit 2. Ta 44 is swollen due to writing.

The image data collection unit has N image buffers 21°22.2
3, the read control signal 50 enables output to the write address output 34 and the luminance data output 44 one by one.

(For example, Information Processing Society of Japan Microphone [Koni 7 Computer Symposium Material 24-2 Image Generation Phase Multi-Microcomputer System, pp. 04-5) Problems to be Solved by the Invention However, in the above configuration, each pixel generation section Then, it is necessary to calculate the write address and output it to the image buffer, which requires a corresponding amount of processing time. Furthermore, since it is necessary to hold the write address in the image buffer, there is a problem in terms of miniaturization. In addition, the wiring that transfers the write address from the image buffer to the image storage unit is essential, and the point of miniaturization is -
C, = There is a problem.

Means for Solving the Problems 1 - In order to solve the problems described above, the image forming apparatus of the present invention has a configuration in which the data collection section outputs a write address to the image storage section. . .

Effect of the Invention With the above-described configuration, the present invention generates image data by utilizing the fact that the luminance data from each pixel generation unit is outputted as pixels in a predetermined partial screen in a predetermined order. In order for the collection unit to output the write address to the image storage unit, the write address output processing in the pixel generation unit is deleted, and the storage capacity of the image buffer for holding the write address is reduced. This makes it difficult to connect the write address outputs from the plurality of image buffers to the image storage unit.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIG.

N pixel generation units 11, 12, 13id5. Calculate the brightness of each pixel of a partial screen obtained by dividing one screen into an appropriate number. Information about which partial screen is being generated by each pixel generating section is sent to the image data collecting section 2 before generating the partial screen. The pixel generation unit starts calculating brightness data from the upper left pixel of the partial screen, and sequentially calculates brightness data from the pixels on the right side. Thereafter, the luminance data of the pixels of the scanning line below it are calculated in order, and finally the luminance data of the lower right pixel is calculated, and the generation of the partial screen is completed. The calculated luminance data is sequentially sent to the image buffer without waiting time.

The N image buffers 21, 22, and 23 buffer the input luminance data, and output the luminance data as soon as it becomes possible to output it to the luminance data output 44 according to the readout control signal 5Q.

The image data collection unit 2 sequentially gives permission for output to the brightness data output 44 to the N image buffers, and if there is brightness data waiting to be output in the image buffer, the image data collection unit 2 outputs permission to the brightness data output 44 according to the partial screen information given in advance. - The address 34 and the write control signal 61 are output to the image storage section 1, and the luminance data of the partial screen from each pixel generation section is written to the partial screen of the image storage section 1.

Each pixel generation unit that has finished generating a partial screen starts generating a partial screen that has not yet been generated, information on the start of partial screen generation is also sent to the image data collection unit 2, and writing of the partial screen starts. . The image generation for one screen ends when the generation of all partial screens ends.

Effects of the Invention In the image generation device of the present invention, since the process of outputting a write address to the image storage unit in each pixel generation unit can be omitted, the amount of calculation in the pixel generation unit can be reduced and the pixel generation process can be sped up. Furthermore, since there is no need to buffer write addresses in each image buffer, the capacity of the image buffer can be reduced, which is advantageous in terms of miniaturization. Furthermore, since there is no need to connect write addresses from each image buffer to the image storage section, it is advantageous in terms of miniaturization.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional example. 1... Image storage unit, 2... Image data collection unit, 11.12.13... Pixel generation unit, 21, 22
゜23...Image buffer, 31.32, 33.34
...Iwagome address, 41.42.43.44...
・Brightness data, 50...Readout control signal, 51...
-Write control signal.

Claims (1)

[Claims] An image storage unit that stores brightness data of all pixels of an image, a plurality of pixel generation units that generate brightness data of each pixel, a plurality of image buffers that temporarily hold the brightness data from each pixel generation unit, and a plurality of an image data collection section that collects luminance data from the image buffer, generates a write address to the image storage section according to each image buffer, and writes the collected luminance data to the image storage section; An image generation device characterized in that the image data collection unit does not generate write addresses to an image storage unit, does not hold write addresses in an image buffer, and does not collect write addresses from the image buffer.