JPH04104574A - Picture processor for facsimile - Google Patents

Abstract

PURPOSE:To unnecessitate excess time for processing and enormous memory areas by executing a conversion processing on a memory by providing a linear density conversion circuit between a picture processing circuit and the memory. CONSTITUTION:A picture memory 11 is provided to output first image information 17 and 19 of stored high-quality linear density for each line by first address signals 16 and 18, a picture processing circuit 13 is provided to output a second address signal 14 and to process second image information 15 of inputted standard linear density, and a linear density conversion circuit 12 is provided to output the first address signals 16 and 18 for two lines by the second address signal 14 and to output the OR output of the first inputted image information 17 and 19 for two lines as the second image information 15. Thus, since the linear density is converted parallelly with the read-out operation of pictures in the memory, the picture memory can be read out without requiring the memory to once convert the image information of the high-quality linear density to the image information of the standard linear density and to store it or being conscious of the picture processing circuit with the standard linear density as an object is a high-quality linear density form.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a facsimile image processing apparatus, and more particularly to a facsimile image processing apparatus that converts high quality line density image information into standard line density image information.

[Conventional technology]

Conventional facsimile image processing devices, when using image information stored in memory at high quality line density as image information at standard line density, perform a logical sum using two lines of image information at high quality line density. The standard linear density image information is stored in a separate area of the memory, and image processing is performed using the standard linear density image information read out from the separate area.

[Problem to be solved by the invention]

In the conventional facsimile image processing device described above, image information stored in memory at high quality linear density is read out, converted to image information at standard linear density, and then stored in memory again.
Since the conversion process is performed in memory, it has the disadvantage that extra processing time and a huge memory area are required.

[Means to solve the problem]

The facsimile image processing device of the present invention includes an image memory that outputs stored first image information of high quality line density line by line using a first address signal, and an image memory that outputs a second address signal and outputs input information. an image processing circuit that processes second image information of standard linear density; and an image processing circuit that outputs the first address signal for two lines based on the second address signal, and processes the first image information for two lines of input. and a linear density conversion circuit that outputs the logical sum output as the second image information.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of one embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the operation of this embodiment.

In this embodiment, as shown in FIG.
8 outputs an image memory 11 line by line, and outputs a second address signal 14 to output the second address signal 14 of the input standard linear density.
The image processing circuit 13 processes the image information 15 of , and outputs the first address signal 16.18 for two lines based on the second address signal 14, and outputs the first image information 17.19 for the input two lines. and a linear density conversion circuit 12 that outputs the logical sum output of as the second image information 15.

Figure 2 shows high quality image information on the image memory 11 that is subject to linear density conversion in this embodiment, and Figure 3 shows standard image information after performing linear density conversion on Figure 2. be. In the figure, 1 indicates a black dot, and 0 indicates a white dot.

To explain the process by which the linear density conversion circuit 2 in FIG. 1 generates the standard image information in FIG. 3 from the high-quality image information in FIG. =X, address signal 16=2
X-1 and address signal 18 = 2X to image memory 11
Image information 17 from image memory 11 obtained by inputting into
YA.

OR logic output 15 = YC of image information 19 = YB is output to the image processing circuit 13 . That is, the image processing circuit 13
Now, when the line address 14=1 is output, the linear density conversion circuit 12 uses the address signal 6 and the address signal 8 as address inputs to the image memory 1, and outputs the output image information "00001100" and "10111000" respectively.
The R logic output “10111100” is sent to the image processing circuit 13.
Output to. Next, the image processing circuit 13 outputs the address signal 14.
=2, the linear density conversion circuit 2 outputs the address signal 16=3 and the address signal 18=4 to the image memory 11.
input the address to , and output image information “111” for each.
10000" and "11001101", the logical output "11111101" is output to the image processing circuit 13.

Similarly, in response to address signal 4=X generated by image processing circuit 13, address signal 16=2X-1 and address signal 7=2X are input to image memory 1, and the resulting image memory 11 is Output image information 17=YA,
By outputting the OR logical output 15=YC of output image information 19=YB to the image processing circuit 13, the image processing circuit 13 is equivalent to reading out the standard image information shown in FIG. 3 from the image memory 11. can perform actions.

〔Effect of the invention〕

As explained above, the present invention provides linear density conversion circuits in the image processing circuit and memory jump, and performs linear density conversion in parallel with the memory image readout operation.
There is no need for memory to temporarily convert and store high-quality linear density image information into standard linear density image information, and the image processing circuit for standard linear density can convert high-quality linear density image information into high-quality linear density format. This has the effect of allowing you to read out the image memory without being aware of it.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIGS. 2 and 3 are diagrams for explaining the operation of this embodiment. 11... Image memory, 12... Linear density conversion circuit, 1
3... Image processing circuit.

Claims (1)

[Claims] An image memory that outputs the stored first image information of high quality linear density line by line using a first address signal, and an image memory that outputs the second image information of input standard linear density by outputting a second address signal. An image processing circuit to process, outputs the first address signal for two lines based on the second address signal, and outputs a logical sum of the input two lines of the first image information as the second image information. 1. A facsimile image processing device, comprising: a linear density conversion circuit that outputs a linear density conversion circuit.