JPS60163080A - Image reduction display processing system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field of the Invention) The present invention relates to a single image reduction display processing method, in particular, when image data expressed in binary values is reduced and displayed on a display, etc. This invention relates to an image reduction display processing method for displaying different images.

(Technical Background and Problems) Information output from computers and the like can only be understood by humans by displaying it as an image on a display or the like.

In general, output information from a computer or the like is expressed by the difference in brightness between binary values, eg, white and black.

Conventionally, when there is a large amount of information output from a computer, etc., and it cannot be displayed all at once on a display, etc., the output information is sequentially displayed on the display by scrolling, etc., and the contents are read. , or reading the outline of the output information array, etc. At this time, it is inconvenient to scroll to get an overview of the whole thing, so you can reduce the output information and display the whole thing at once.
Second, it is being displayed. However, if the image information after reduction is displayed on a display in the same binary 1 as the image information before reduction, for example, white and black, the image information before reduction will not be displayed adequately. In particular, there was a problem in that the image after reduction became flat because details were not displayed.

(Object and Structure of the Invention) The object of the present invention is to solve the above-mentioned problems.
When reducing and displaying image information represented by values on a display, etc., the reduced image is associated with a multi-value 1, for example, multiple brightness values, based on binary image information included in the area to be reduced. The aim is to make the reduced image closer to the original binary image by displaying it. Therefore, the image reduction display processing method of the present invention is an image reduction display processing method for displaying binary image data in a reduced size, and includes a frame memory for storing the binary image data, and m x n pixels from the frame memory. an image data reading unit that reads out the plurality of binary image data;
The mX read out by the image data reading unit
A level converter that generates multi-value image data based on binary image data for n pixels; and D that converts the multi-value image data converted by the level converter into an analog signal.
/A converter, and displays an image having a reduced multivalue level based on the output signal from the D/A converter.

(Example of the invention) The present invention will be described in detail below based on the drawings.

FIG. 1 is a block diagram of a conventional image reduction display processing method.

2 is an explanatory diagram for explaining image reduction by the conventional image reduction display processing method shown in FIG. 1, FIG. 3 is a configuration diagram of one embodiment of the present invention, and FIG. 4 is an embodiment of the present invention shown in FIG. An example of image reduction according to an example, FIG. 5 is a block diagram embodying one embodiment of the present invention shown in FIG. 3, and FIG. 6 is an explanatory diagram for explaining the block diagram shown in FIG. 5.

In the figure, 1.5 is frame memory, 2 is display, 3
．． 6 is the controller, 4.8 is the D/A converter, 6'
Beam fresh controller, 7 is conversion table section,
7” is a level converter, 9 is a P-S converter (parallel-serial converter), 10 is a 4tol data selector, 11
12 represents a changeover switch, and 12 represents an interface.

In FIG. 1, reference numeral 1 in FIG. 2 is a frame memory, which stores output information from a computer or the like in order to display it on the display 2. In FIG. Access control is performed by the controller 3 in synchronization with the scanning period of the frame memory 1 and the display 2. A predetermined digital signal read from the frame memory 1 is converted into an analog signal by the D/A converter 4 and supplied to the display 2. As a result, the 2
Display 2 displays output information from a calculator, etc. expressed as a value.
Forms that humans can recognize, such as letters, are displayed in black and white.

FIG. 2 (A>) shows an example of character display according to the configuration shown in FIG. The illustrated pattern information stored in the frame memory 1 is read out and displayed on the display 2.

This allows humans to recognize information output from a computer or the like.

FIG. 2(B) shows the pattern information "Wealth" shown in FIG. 2(A) reduced to 1/4 and displayed on the display 2, and the pattern information "Wealth" is subdivided into 2×2 pixels. each pixel 2
The upper left corner of ×2 is taken as a representative point, and only the information of the representative point is read out from the frame memory 1 mentioned above and displayed on the display 2. For this reason, the pattern information "wealth" becomes a flat pattern with the black detailed pattern information disappearing as shown in the figure, and it is difficult to recognize the pattern information "wealth" before reduction.

FIG. 2(C) shows the illustrated pattern information "Tomi" in FIG. 2(A) reduced to 1/4 and displayed on the display 2, and FIG. 2(A) read out from the frame memory 1. If even one of the 2×2 pixels of the illustrated pattern information “Ten” is black, the reduced pattern information is displayed on the display 2 as black. In this way, if even one of the 2x2 pixels is black, the image is displayed as black after reduction, so the entire image becomes black, and it is not possible to sufficiently represent the "wealth" before reduction. I can't say that.

In the past, the pattern information after reduction was expressed in the form of a binary digital signal in the same way as the pattern information before reduction, which caused the problem that characters etc. after reduction were difficult to see. .

Therefore, in the present invention, when image information expressed in binary values is reduced and displayed on a display etc., the image reduced based on the binary image information included in the area to be reduced is converted into a multivalued image, for example, a plurality of values. By displaying 4J in accordance with the brightness value, the reduced image is brought closer to the original binary image. This will be explained below.

In FIG. 3, image information output from a computer or the like is stored in a frame memory 5, and the image information stored in a predetermined minute area m×n is read out and converted based on instructions from a controller 6. It is supplied to the table section 7. The conversion table unit 7 converts the image information expressed in binary form stored in the minute area m x n into one multi-value 1, for example, values of different brightness. This conversion is performed by referring to a conversion table, and is performed by representing the image information as corresponding to the number of "1" or "0'" stored in the minute area mXn. For example, all the binary image information in the minute area mXn read from the frame memory 5 is used as an address to read out one multi-value data corresponding to a predetermined brightness previously stored in the ROM. This is done by

The conversion table section 7 converts all the binary image information stored in the minute area mxn into one multi-valued image information k, and supplies it to the D/A converter 8. The D/A converter 8 converts the multivalued image information k into an analog signal and supplies it to the display 2. As a result, reduced image information having multivalued brightness and darkness is displayed on the display 2.

FIG. 4(A) shows an image pattern before being reduced, which is displayed on the display 2 based on the embodiment of the present invention shown in FIG. 3, and FIG. 4(B) shows the image pattern shown in FIG. ) shows an image pattern after reducing 2×2 pixels in a minute area to one pixel having multivalued brightness and darkness. The "black part" in FIG. 4 (B) indicates the case in which all four of the 2x2 pixels shown in FIG. '', the ``shaded area'' indicates the case where two pieces are ``black'', the ``dotted area'' indicates the case where 1 piece is 1 black'', and ``
"White part" does not indicate the case where all four pieces are "white".

In this way, in the case of the present invention, when a binary image pattern is reduced and displayed on the display 2, the information of the image pattern before reduction is changed to the information of the image pattern after reduction, as shown in FIG. This information is included in the image pattern, and even if it is reduced, the rate of loss of the information of the original image pattern is small, and an image with a high degree of discrimination can be obtained.

In Fig. 5, numeral 5 in Fig. 1 indicates a frame memory;
The case where the value of the illustrated micro region mXn is set to 2×2 is shown.

The frame memory 5 is read out at high speed in synchronization with the scanning cycle of the display.

It is divided into four banks A to D. The four banks A to D are assigned addresses consisting of four addresses A to D as shown in FIG.
The image information belonging to the .

The p-s converter 9 sequentially converts the respective parallel n-bit image information into serial information and converts the parallel n-bit image information to the level converters 7' and 4.
t01 data is supplied to the selector 10.

The changeover switch 11 switches between reducing the image information read from the frame memory 5 (reduction as shown) and not reducing it (normal as shown). When the changeover switch 11 is set to the normal position shown in the figure,
Serial data A to D supplied from the p-s converter 9 are the 4t.

The LSB of the image refresh address, Xo and Yo, are sequentially converted into a serial image signal by the data selector 10 and supplied to the D/A converter 08. The D/A converter 8 converts the digital signal expressed in binary form into an analog signal and supplies it to the display 2. As a result, the unreduced image information 1, for example, "Ten" shown in FIG. 4(A) is displayed.

Also, set the selector switch 11 to the reduced position shown in the illustration.
- When the serial data A to D supplied from the p-s converter 9 are converted by the level converter 7° to the number of P1'' or P0'' included in the serial data A to D, A single multi-valued signal 2 is supplied to the D/A converter 8 as a signal having a value of O to 3, for example. The D/A converter 8 converts the multivalued digital signal into an analog signal and supplies it to the display 2. As a result, an image 1 having a reduced brightness difference, for example, "Ten" shown in FIG. 4(B) is displayed.

Based on instructions from a computer etc., the interface 12
When a generator that generates 1 yen or characters writes predetermined image information into the frame memory 5, adjustments are made so that there is no conflict with the refresh controller 6''.

Further, the refresh controller I-roller 6'' receives a predetermined address signal A in order to perform the various controls described above.

Xo (LSB of address signal A), Yo (LSB of address signal A), synchronization clock signal Cr-, or display 2 synchronization signal Hd (horizontal drive synchronization signal), Vd (vertical drive synchronization signal)
etc.

(Effects of the Invention) As explained above, according to the present invention, when image information expressed in binary values is reduced and displayed on a display etc., the 2 By displaying a reduced image based on value image information in correspondence with one multi-value 5, for example, multiple brightness values, the reduced image can be brought closer to the original binary image, with a discriminability of 1. You can get high quality images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional image reduction display processing method. 1. Fig. 2 is an explanatory diagram illustrating image reduction by the conventional image reduction display processing method shown in Fig. 1, Fig. 3 is a configuration diagram of one embodiment of the present invention, and Fig. 4 is a diagram illustrating an embodiment of the present invention shown in Fig. 3. An example of image reduction according to the embodiment, FIG. 5 is a block diagram embodying one embodiment of the present invention shown in FIG. 3, and FIG. 6 is an explanatory diagram for explaining the block diagram shown in FIG. 5. In the figure, 2 is a display, and 5 is a frame memory. 6 is the controller, 6゛ is the refresh controller,
7 is a conversion table section, and 7゛ is a level conversion section. 8 is an I)/A converter, 9 is a p-s converter (parallel-serial converter), 10 is a 4tol data selector, 11 is a changeover switch, and 12 is an interface. Patent applicant: Fujitsu Ltd. Representative Patent Attorney Hiroshi Mori 1) (1 other person) 3 2

Claims (1)

[Claims] In an image reduction display processing method for displaying binary image data in a reduced size, there is provided a frame memory for storing the binary image data, and an image for reading out a plurality of m×n pixels of the binary image data from the frame memory. a data reading section; and the m read out by the image data reading section.
A level converter that generates multi-value image data based on binary image data for xn pixels, and a D/A converter that converts the multi-value image data converted by the level converter into an analog signal. An image reduction display processing method comprising: displaying an image having a multivalue level reduced based on an output signal from the D/A converter.