JPH03240099A - Image generating device - Google Patents

Abstract

PURPOSE:To display image data which differ in resolution fast at the same time with the small consumption of a storage area by putting areas which differ in resolution in blocks and controlling the resolution, positions, and sizes of the blocks. CONSTITUTION:Image data which differ in resolution are put in blocks, whose resolution, positions and sizes are controlled to hold the image data on an image block resolution and position storage device 100 and image data storage device 101 while the original resolution of the image is maintained. Then, at the time of developing an image data, an image development processor 102 develops the image data according to the resolution and positions of the image blocks which are controlled by an image display device 103. Consequently, the storage area for the image data can be reduced and the image data which differ in resolution can be displayed fast simultaneously at low cost.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image generation device that creates an image from image data.

[Prior Art] In devices that generate images, the resolution, which represents the density of the image, is moving toward higher resolution as the quality of image display becomes higher.

However, when it comes to image generation devices, you need to consider compatibility with conventional resolutions, when you want to use existing image data, or when a low-resolution image is sufficient and high-resolution image data is not required. In some cases, the image generation device uses image data with a resolution lower than that originally possible.

Conventionally, when using low-resolution image data and high-resolution image data at the same time, the low-resolution image data is converted to high-resolution image data to generate images with different resolutions. Was.

[Problem M to be solved by the invention] However, in the above-mentioned conventional technology, it takes time to convert low-resolution image data to high-resolution image data, which slows down the processing time of the image generation device. There is another problem that when low-resolution image data is converted to high-resolution image data, the storage area required to store the image data increases.

SUMMARY OF THE INVENTION The present invention is intended to solve these problems, and its purpose is to provide an image generation device that can simultaneously handle image data of different resolutions at high speed while minimizing storage space consumption. It is in.

[Means for Solving the Problems] As shown in FIG. 2, the image generation device of the present invention divides image regions with different resolutions into blocks, and manages the resolutions, positions, and sizes of the blocks. The image storage device 100 stores image data at its original resolution. The image processing device 102 stores the image data in the image data storage area 101 and develops it as an image by the image display device 103 according to the resolution and position of the image block.

[Operations] According to the above-described configuration of the present invention, low-resolution image data can be handled as a low-resolution image, which reduces the consumption of storage space, and is performed at low cost and in order to handle the resolution uniformly. In addition, since there is no need to convert image data to match the resolution, processing can be performed at high speed, and image data with different resolutions can be handled simultaneously.

[Example] Hereinafter, the present invention will be explained in detail based on an example.

FIG. 1 shows an image in which image data blocks of different resolutions are included on the same screen. Here, for ease of explanation, in an image with a resolution of 100 dots per inch (hereinafter referred to as 100dpi), 200dp
Suppose that i image blocks are included.

A page printer using the image generation device of the present invention,
An example of generating a textured image will be described below.

It is assumed that this page printer develops an image from the upper left to the right in FIG. 1, and paper is fed from the top to the bottom. Image data may be stored separately at different resolutions or may be stored in the same location. The page printer takes out the 100 dpi image data of point (a) in FIG. 1 from the storage device, develops it on paper, and then similarly advances the processing to the right.

If the resolution of this page printer is 200 dpi, there is only a dot width of 200 dpi in the vertical direction (3
00), when developing 100 dpi image data, one line of data is automatically developed twice (301
) (Figure 3).

When the page printer reaches the coordinates (xb, yb) in Figure 1 where different resolution blocks appear, the page printer doubles the frequency of the clock used to synchronize the image data development (200dpi/100dpi). ) to 20
Generates an image of 0 dpi (Figure 4), 200 dpi in the horizontal direction
The coordinates (X c ry c
), return the clock frequency to the original 100
The dots are expanded according to the dpi timing. In addition, 4
00 is a clock signal to be used, and 401 is dot image data.

This device allows image data with different resolutions to be displayed on the same screen at high speed.

In the example of the page printer described above, images with different resolutions are generated by changing the development frequency in the development of horizontal image data, but in the present invention,
Since the resolution and the position of the image block are managed, the development frequency is fixed at 200 dpi according to this management data, and when handling 100 dpi dot data (500), two 200 dpi dots are used. It is also possible to handle different resolutions at the same time by placing a dot at 200 dpi twice (501), assuming that there is a dot at 200 dpi (Fig. 5).

For example, if one screen only needs to have a resolution of 100 dpi, by using the present invention, the amount of image data storage area consumed can be reduced by 1 compared to the case where the image data is converted to 200 dpi and stored. It can be reduced to /4.

It should be noted that the embodiment mentioned here is just one embodiment.

[Effects of the Invention] As described above, in the present invention, areas with different resolutions are divided into blocks, and the resolution of the blocks, the positions and sizes of the blocks are managed, and the management data is followed when developing the image. This has the effect of reducing the consumption of storage area for image data and simultaneously displaying image data of different resolutions at low cost and at high speed.

FIG. 5 is an explanatory diagram of an embodiment of the image generation device according to the present invention.

Claims (1)

[Claims] By managing the resolution of image data and its positional relationship in a storage device that holds data for generating images and an image generation device that creates images from that data,
An image generation device characterized by being able to simultaneously use image data of different resolutions.