JPS58142668A - Scanning controlling method - Google Patents

Abstract

PURPOSE:To obtain a clear picture without increasing scanning time and memory capacity by providing plural scanning elements and a device to change the number of scanning elements that constitute a picture element and changing the number of scanning elements in accordance with the kind of information picture. CONSTITUTION:Characters of edited data of image information or position of arrangement of figure and image are stored in an address monitor 6. Figure and image are stored in a memory 7 and characters are stored in a memory 8 corresponding to addresses stored in the monitor 6. Information is read successively by the monitor 6 from upper left of edited data of image information. When the information is characters, the monitor 6 outputs a signal A, and the memory 8 is selected by a selection controlling circuit 10 and read out successively and inputted to a line buffer 9. At the same time, elements of scanning element group 3 are driven three in a set by a scanning element changeover device 5. When information is a picture, elements are driven two in a set.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Technical Field of the Invention The present invention relates particularly to a scanning control method for a scanning device that obtains desired information by scanning a medium.

A device that obtains desired information after creating a negative image.

For example, the present invention relates to a scanning control method suitable for use in newspaper CTS equipment and the like.

(B) Display of technical background information 5 Display of the apparatus for recording and recording method 1 Display, method of main scanning and sub-scanning on the recording medium is frequently used. Display and recording devices are also widely used in various office automation equipment.

Efforts are being made to research and develop equipment to make it more reliable and cheaper.

In addition, in recent years, newspapers, magazines, etc. have become indispensable as a means of conveying sentiment.

Improving printing quality as well as promptness and accuracy are important issues.

(C) Prior Art and Problems Conventionally, as a method for displaying and recording one character and one figure, there has been a method of performing main and sub-scanning on one display recording medium.

This method is applied to newspaper cr'r's equipment, for example.

When creating a negative image, scanning lines are formed that are slightly thicker than the scanning pitch in the main and sub-scanning directions.

In other words, it goes without saying that when the scanning line width is ten times larger than the scanning pitch, even if it is equivalent to the scanning pitch, the scanning pinch error is 1.
Due to pixel formation errors, etc., when expressing a single character or figure, scanning remains in the solid black part of the negative image, that is, white spots appear as lines when printed, so it is slightly thicker than the scanning pitch. Form a scanning line.

However, even with this method, the scanning line is thicker than the scanning pinch, so the image after scanning is particularly negative.
When forming an image, the line width of one image forming part (the black part of the negative image) is thick, and the line width of the non-image forming part (the white part of the negative image) becomes fine. In other words, non-YI! II@! The formed portion is smaller than the scanning pinch and becomes a fine line when printed, making it extremely unsightly.

In addition, due to the effects of scanning pinch errors and image formation errors as mentioned above, in the worst case, it will take 111 minutes without image formation (
The white part of the negative image) is not formed.

It is also possible that lines may be missing.

For this reason, the scanning pinch of main and sub-scanning can be finely adjusted.

There is a method in which the first few scanning lines are always interposed in forming one pixel.

However, in this method, the number of pixels increases by the square of the number of scanning lines, so it takes time to perform two scans, and it also requires a huge storage memory capacity.

Furthermore, when printing photographs in newspapers, magazines, etc., printed matter that is clearer than nine characters, nine figures, etc. is required.

Naturally, in order to obtain clear prints, the scanning lines must be made fine.

However, C1 of figures and images on one page of newspapers, magazines, etc. is a small amount.

Even though the pixels were a little coarse and the ζ was sufficient for most characters, it was scanned with Il and +1 of the scanning line.

In other words, there have been major problems in that scanning with fine scanning lines increases the scanning time and increases the memory capacity.

(D) Object of the Invention The object of the present invention was to provide a scanning control method that can display and record clear images without increasing scanning time or memory capacity. There is one for each offer.

(E) Structure of the Invention And this object, according to the invention, comprises a plurality of scanning elements for displaying or recording a desired information image on a medium in a pixel arrangement by scanning over the medium; scanning element switching means for switching the number of scanning elements constituting one pixel among the plurality of scanning elements; 5) the number of scanning elements constituting one pixel is switched according to the type of the information image This can be achieved by using a scanning control method.

(1.゛) Examples of the invention Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of a scanning device for explaining a scanning control method according to the present invention.

In the figure, 1 is an image forming medium on which desired information is recorded;
3 is a scanning element group that forms a dot pattern of desired information on the image forming medium 1 through the lens 2; 4 is a scanning element group 3;
This is a control section that performs drive control of the.

Further, FIG. 2 shows a detailed view of the control f'J11 section.

In the figure, reference numeral 3 indicates a scanning element group consisting of six scanning elements, 5 indicates a set of 2 jut scanning elements, which are driven by a switching signal from a selection control circuit 12810, which will be described later, when driving the scanning element group 3. Alternatively, scanning element switching means 6 switches to one of the 3+1h11 sets.

For example, it stores the placement positions of characters, figures, and images in the editing data of image information configured as shown in Figure 3, and monitors signals according to the placement positions (in the case of text, two figures of people, and of images). 7 is the address monitor that outputs the desired figure or image corresponding to the address stored in the address monitor 6; figure or image memory in which the pattern is stored; 8 is the address monitor 6 is a character memory in which dot pattern data of a desired character corresponding to the stored address is stored; 9 is a line buffer for temporarily storing dot pattern data from the graphic, image memory 7 and character memory 8;
O outputs a selection signal for selecting one figure, image memory 7° or one character memory 8 according to the monitor signal from the address monitor 6, and further outputs a switching signal to the scanning element switching means 5 (C2 figure in the case of characters, C2 figure in the case of images). This is a selection control circuit that outputs

The operation of an embodiment according to the present invention will now be described with the configuration as described above.

As shown in FIG. 1, the image forming medium is rotated in the direction of the arrow (indicated by the symbol X in the figure), and at the same time the scanning element group 3 is
A desired dot pattern is sequentially formed on the image forming medium 1 by driving.

Here, the structure of the desired information image formed on the image forming medium 1F will be described in the case shown in FIG.

The address monitor sequentially reads out, for example, the edited data of -f image l'lI# information as shown in FIG. 3 in the direction of the arrow from the upper left end. At this time, the monitor signal output by the address monitor [; is the signal A, and the monitor signal A is input to the selection control circuit 10. The non-selective circuit 1/810 inputted to the monitor signal selects the character memory 8, and data in the character memory 8 corresponding to the address of the address monitor 6 is sequentially read out and input to the line buffer 9. Further, the selection control circuit 10 selects the character memory 8 and outputs a switching signal C to the scanning element switching means 5.

The scanning element switching means 5 to which the switching signal C is input switches the scanning elements to be driven in groups of 3117i11.

The 3 (dots and dots) pattern data from the character memory 8 is added to the 111 sets of scanning elements 3 by the liner buffer 9 to sequentially form character dot pattern data on the forming medium 1 in one image.

At the same time, the selection control 1ml path IO reads out the address monitor 6 to detect whether or not there is a change in the monitor signal.

Here, the monitor signal from address monitor 6 is signal B
When the selection control 1 port 1 path IO selects the graphic and image memory 7, 7. The graphics corresponding to the address of the address monitor 6 and the data of the image memory 7 are read out and inputted to the line bar 7 floor 9.

In addition, the selection control circuit 11 selects the figure and image memory 7, and switches the scanning element in synchronization with the timing at which the figure input into the line buffer 9 and the I-pattern data from the image memory 7 are applied to the scanning element. A switching signal 1] is output to the means 5.

The scanning element switching means 5 which is manually operated by the switching signal I) switches the scanning elements so that 2111+11 sets form one scanning line.

The line buffer 9 adds the dot pattern data from the image memory 7 to the scanning element group 3, and transfers the dot pattern data of the two figures to the image forming medium 1.
Form into a sheet.

When the dot pattern data of this figure is formed on the image forming medium 1''- and the monitor signal from the address monitor 6 changes to a signal, the width of the scanning line can be successively varied by performing the switching operation described above. I can do it.

Further, the scanning speed in the main scanning direction at this time is switched by a scanning speed switching means (not shown) to 1.5 times the scanning speed when one scanning line is formed by three (1^II) scanning elements.

- As explained above, according to this embodiment, two scanning elements are used, 111. or.

The scanning time and memory capacity can be kept to a minimum by switching to drive a set of three.

Also, one scanning line is scanned by scanning element 2f1M+ or 3
By scanning the scanning lines with each scanning line, a scanning line that is slightly thicker than the scanning pitch is formed, and the width of the circle is minute, so that it is possible to obtain good printed matter without white spots or the like.

FIG. 4 shows a schematic diagram of another embodiment of the scanning control force method according to the present invention.

In the figure, reference numeral 11 indicates a plurality of line buffers 94;
If black, white 2 black of sub-scanning power is detected from 1 to 1,
Detection (dot pattern recognition control that outputs K No. N self)
+, l (1' is a selection control circuit which has a function of outputting a selection signal D' when a signal E from a dot pattern recognition control i+++++ is input manually in addition to the function of the selection control circuit 10; 5' is a selection control circuit which has a function of outputting a selection signal D'; Selection signal D: 31 when manually operated
This is a scanning element switching means for switching one set of single-edged scanning elements of the No. 11111 silk scanning elements into a set of two scanning elements.

In this embodiment, it goes without saying that the number of scanning elements is changed according to the type of information in the previous embodiment, and when the dots are formed in the order of black, white, and black in the sub-scanning direction, the white part is It is something that can be controlled to ensure that nothing is missing.

That is, in the dot pattern recognition control section 11, the plurality of line buffers 9 (three scanning lines in FIG. 4) cause the dots in the sub-scanning direction to be black.

Detects whether it is white or black.

If the dot pattern recognition control section 11 detects black, white, or black dots in the sub-scanning direction, it outputs a detection signal E.

The selection control circuit 10' to which the detection signal D is inputted outputs the selection signal D' in synchronization with the timing of forming the black part of the dosel l- in the sub-scanning direction which comes before the white part.

The scanning element switching means 5' to which the selection signal D' is input switches so as to drive only the dots in the black part in pairs. scan in accordance with the scanning signal.

By performing the above-described operation, it is possible to prevent the lines in the white portion from being missing even when the dots in the sub-scanning direction are black, white, or black.

Therefore, good printed matter can be obtained.

In the second embodiment, six scanning elements are used.

Although the description has been made regarding the case where scanning is switched using a set of two scanning elements or 311+1 silk, the present invention is not limited to this. (It goes without saying that the use thereof is also included in the present invention.

(G) Effects of the Invention As explained above, according to the present invention, the number of units of scanning elements can be changed depending on the type of information, so scanning time and memory capacity can be kept to a minimum. , it is possible to obtain good printed matter.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the scanning control method according to the present invention, FIG. 2 is a detailed diagram of the control section shown in FIG. 1, and FIG. 3 is a configuration of a desired information image stored in the address monitor. FIG. 4 is a diagram showing a schematic configuration of another embodiment of the scanning control method according to the present invention. In the figure, 1 is the image forming medium, 2 is the lens, 3 is the scanning element group, and 4 is the camera! ? ff11 section, 5.5' is a scanning element switching means, 6 is an address monitor, 7 is a figure/image memory, 8 is a character memory, 9 is a line buffer, 10.10
' is a selection control circuit, and 11 is a dot pattern recognition control section.

Claims (1)

[Claims] A plurality of scanning elements for displaying or recording a desired information image in a pixel configuration on a medium by scanning the medium, and a scanning for switching the number of scanning elements constituting one pixel among the plurality of scanning elements. 1. A scanning control method comprising: element switching means, the number of scanning elements constituting one pixel being switched in accordance with the type number of the information image.