JPH04128887A - Image display device - Google Patents

Abstract

PURPOSE:To easily enlarge and reduce an image with high quality and to eliminate need for a mass-storage and increase a processing speed by converting density data on a digitally converted input image according to magnification pattern data in a pattern storage. CONSTITUTION:Image data read by a scanner 1 is inputted as an analog signal indicating the density of specific area and converted into a digital value, which is stored in an input image storage part 5. The storage part 5 is stored with the data as density data irrelevantly to display density. When the magnifications of a display are indicated, on the other hand, an image processing part 7 reads the specified magnification pattern data out of a pattern storage part 8 and converts the density data on the input image stored in the storage part 5 according to the pattern. The converted data is stored in a processed image storage part 10 and further displayed on a CRT 12 through a display control part 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image display device, and more particularly to an image display device that displays high-quality images by enlarging and reducing them at high speed.

[Conventional technology]

Generally, an image display device is used to display an image on a CRT, but when it is desired to enlarge or reduce an image at high speed, it is necessary to enlarge or reduce the image at high speed and with high quality. In conventional image display devices, images are input according to the size of the basic display screen.

[Problem to be solved by the invention]

In the above-mentioned conventional image display device, since the image is inputted in accordance with the substrate display size, it is difficult to continuously enlarge or reduce the image, and the quality is poor.

In addition, since image data is stored according to the basic display size, a large memory capacity is required.
The disadvantage is that the processing speed is slow.

[Means to solve the problem]

An image display device of the present invention is an image display device that enlarges/reduces and displays an image, and includes an image input means, an A/D conversion means for converting analog data into digital data, and a memory for storing input image data. an input image storage means for instructing the image to be enlarged or reduced; a magnification input means for instructing enlargement or reduction of the image; an image processing means for enlarging or reducing the image according to the instruction; a pattern storage means for storing a basic pattern for enlargement or reduction; It is characterized by comprising a processed image storage means for storing a processed image image, and a display means for displaying the stored image image data.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of density data stored in the input image storage section in FIG. 1, and FIG. 3 is a conversion diagram of the image processing section in FIG. 1. It is a figure showing an example of a pattern.

In FIG. 1, this embodiment includes a scanner 1, an image input section 2, an A/D conversion section 3, an input image storage control section 4, an input image storage section 5, and a magnification input section 6 for instructing the magnification. , an image processing unit 7, a pattern storage unit 8, a processed image storage control unit 9, a processed image storage unit 10,
It consists of a display control section 11 and a CRT 12.

Image data read from the scanner 1 according to a command from the image input section 2 is input as an analog signal representing the density of a specific area. This analog signal is converted by the A/D converter 3 into a digital value representing the density, and is stored in the input image storage 5 by the input image storage controller 4. Since data is stored in the input image storage section 5 as density data regardless of display density, the storage capacity of the input image storage section may be smaller than that of the conventional one.

In this embodiment, as shown in FIG. 2, the density data is stored in specific areas (for example, areas 1017 to 1024) of the CRT 12. Therefore, compared to the conventional example in which all information of CRT resolution is stored, the storage capacity is clearly smaller.

When a display magnification is specified by the magnification input section 6, the image processing section 7 reads the specified magnification pattern data from the pattern storage section 8, and converts the density data of the input image stored in the input image storage section 5 into this pattern. Convert according to

This conversion method will be explained using FIG. 3. In FIG. 3, the pattern is halftone dotted and stored at a density corresponding to the CRT 2 in accordance with the density data. In this embodiment, this pattern is simply used, so there is no conversion error.
Can be enlarged or reduced at high speed. In addition, CRT1 is shown in Figure 3.
This shows an example of the density pattern when displaying the image image 2 in a reduced size, and the specified density pattern is moved to the reduced pattern size based on the density data, but the same is true when it is enlarged and displayed. . However, the pattern size is different.

Next, the converted data is stored in the processed image storage section 10 via the processed image storage control section 9. moreover,
The processed image data stored in the processed image storage section 10 is displayed on the CRT 12 via the display control section 11.

In this embodiment, a case has been described in which the display is output to the CRT 12, but the present invention is not limited to this, and similar effects can be obtained when output to a printer.

〔Effect of the invention〕

As explained above, according to the image display device of the present invention, it is possible to easily enlarge or reduce an image with high quality, and there is an effect that a large storage capacity is not required and processing speed is improved. .

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a diagram showing an example of density data stored in the input image storage section in FIG. 1, and FIG. 3 is a conversion diagram of the image processing section in FIG. 1. It is a figure showing an example of a pattern. 1...Scanner, 2...Image input section, 3...A/
D conversion section, 4... Input image storage control section, 5...
Input image storage section, 6... Magnification input section, 7... Image processing section, 8... Pattern storage section, 9... Processed image storage control section, 10... Processed image storage section,
11...Display control unit, 12...CRT.

Claims (1)

[Claims] An image display device that enlarges/reduces and displays an image, comprising: an image input means, an A/D conversion means for converting analog data into digital data, an input image storage means for storing input image data; a magnification input means for instructing enlargement/reduction of the image; an image processing means for enlarging/reducing the image according to the instructions;
An image display comprising: a pattern storage means for storing a basic pattern of enlargement/reduction; a processed image storage means for storing the processed image; and a display means for displaying the stored image data. Device.