JPH05160995A - Image processor - Google Patents

Abstract

PURPOSE:To easily obtain a thinned-out image without using any complicate method which shifts a write address at each time in a special image process for obtaining a recording image thinning-out output by thinning out an input image of full size. CONSTITUTION:When image data are written in an image memory 11, a memory address generating circuit 12 which is provided with an address selecting circuit between the write address and an image memory is used to fix one bit of an address line to '1' corresponding to a thinning-out quantity. When the data are read out, a memory timing circuit 10 and the memory address generating circuit 12 are changed to a read side and the data written in the image memory 11 are read out as they are.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing apparatus, and more particularly to an image processing apparatus for performing special processing on an image.

[0002]

2. Description of the Related Art Image processing apparatuses are indispensable for newspaper companies, printing companies, etc. that handle image data. In particular,
Printing companies issue various printed materials by using special image processing technology.

Generally, in order to output a record in which an image is thinned out in a toothless manner, image data sent to a recording device is thinned out by a predetermined thinning amount, and
It was necessary to shift the write address given to the memory in the image processing apparatus each time.

[0004]

However, in the above-mentioned conventional method, the image data sent from the host device must be thinned out. In addition, in order to output the thinned-out image data as a thinned-out image on the recording, there is a drawback that the write address given to the memory in the image processing apparatus must be shifted each time.

In view of the above-mentioned drawbacks, a technical object of the present invention is to provide an image processing apparatus for outputting an image in which the write addresses to the image memory are thinned out without shifting.

[0006]

SUMMARY OF THE INVENTION According to the present invention, an image memory for storing image data, a memory timing generation circuit for generating timing of writing and reading of the image memory, and an address to the image memory are provided. And a memory address generating circuit for designating.

Further, the memory address generating circuit has a gate circuit for thinning out image data in a toothless manner during recording.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIG. 1, first, the image memory 11
The data inside is cleared so that it becomes white on the image recording, then the image thinning amount is set from the CPU 13, and the terminal 10
Image data is received from 1.

At this time, the memory timing generation circuit 10
Generates the timing required for writing. Also,
In the memory address generation circuit 12, 1 bit of the write address is fixed to "1" according to the thinning amount. By doing so, the image data can be written in the image memory in a scattered manner.

Next, each of the memory timing generation circuit 10 and the memory address generation circuit 12 is changed to the read side, and the data written in the image memory 11 is read as it is.

FIG. 2 shows a block diagram of the memory address generation circuit 12. When image data is written in the image memory 11, the write counter 22 is operated by the oscillator 24 corresponding to the write cycle, and the write address is output to the terminal 201.

At this time, the thinning amount of the image is set from the terminal 203 in advance. With this set, as shown in Table 1, image data is thinned out and stored.

[0014]

[Table 1]

For example, in the case of thinning out 2 [Table 1 (c)], the second bit of the write address is set to the address select circuit 2
Fixed to "1" by 1. Then, as shown in Table 1 (c), data is written twice in the memory at the same address every two data. That is, the data written the first time (the part erased by =) disappears, and the data written later is stored in the image memory every two data. In addition to Tables 1 (a) to (d), it is possible to vary the thinning interval in multiples (1, 2, 4, 8 ...) By fixing 1 bit having a write address to "1". It is possible.

Next, the oscillator 24 corresponding to the read cycle
Causes the read counter 23 to operate, and the terminal 202
By outputting the read address to, it is possible to obtain the missing image data for the transmitted image data in the original size.

[0017]

As described above, according to the present invention, it is not necessary to thin out the image data sent from the host device. Further, when outputting as an image thinned out in recording, a complicated circuit for shifting the write address given to the memory in the image processing device each time is not required, and it can be easily realized by only a simple gate. effective. Further, visually, it has an effect of reducing the density of the image.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a memory address generation circuit.

[Explanation of symbols]

 10 Memory Timing Generation Circuit 11 Image Memory 12 Memory Address Generation Circuit 13 CPU 21 Address Select Circuit 22 Write Counter 23 Read Counter 24 Oscillator

Claims (2)

[Claims] 1. An image memory for storing image data, a memory timing generation circuit for generating writing and reading timing of the image memory, and a memory address generation circuit for designating an address to the image memory. An image processing device characterized by being provided. 2. The image processing apparatus according to claim 1,
The image processing apparatus, wherein the memory address generating circuit has a gate unit for thinning out the image data in a toothless manner on recording, and selects a thinning amount as necessary.