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A storage and transmission method of image raster data

A raster data, transmission method technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of inability to guarantee image accuracy, low compression rate, large storage space, etc.

Active Publication Date: 2022-02-15
LUDONG UNIVERSITY
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  • Abstract
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Problems solved by technology

Lossless compression technology mainly includes file formats such as tif, png, etc. Usually they require large storage space and low compression rate; lossy compression usually uses the JPEG lossy compressed image standard format, although it has a better compression rate and reduces storage capacity. space, but the accuracy of the image cannot be guaranteed, and the image is distorted

Method used

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  • A storage and transmission method of image raster data
  • A storage and transmission method of image raster data
  • A storage and transmission method of image raster data

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Embodiment Construction

[0042] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0043] Please refer to Figure 1-Figure 3 As shown, the storage and transmission method of the image raster data includes the following steps:

[0044] A method for storing and transmitting image raster data, comprising the following steps:

[0045] S1. Acquire image raster source data, the image raster source data is composed of RGB three-channel components; preset accuracy r=0.9;

[0046] S2. Segment the image raster source data, and divide the image raster source data into several rectangular blocks with a size of 20×20; the parts less than one rectangular block are filled with 0.

[0047] S3. Perform the following compression processing on the rectangular blocks obtained in step S2 one by one;

[0048] S3-1. ...

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Abstract

The invention discloses a method for storing and transmitting image raster data. By dividing the image raster data into a plurality of fixed-sized rectangular blocks, sorting the values ​​of each channel component in the rectangular block according to the number of repetitions to obtain a list of channel component values , under the premise of satisfying the accuracy r, discard the lesser values ​​in the channel component value list, and use the position information of the channel component value in the channel component value list instead of the channel component value itself to compress and store the image raster data. Therefore, the image raster data storage and transmission method of the present invention can reduce the storage space of the image raster data under the premise of ensuring the accuracy r, the method is simple, the execution efficiency is high, and distributed processing can be realized, which is especially suitable for Compress large-scale raster data.

Description

technical field [0001] The invention relates to the technical field of image raster data storage and transmission, in particular to a method for storing and transmitting image raster data. Background technique [0002] Raster data is a data organization method that represents spatial features or phenomena in the form of a two-dimensional matrix. Each matrix unit is called a grid unit or pixel, and each data of a grid unit represents the attribute data of a feature or phenomenon. . For image raster data, it generally includes multiple channel information, the common ones are RGB or RGBA, R means R channel, which records the red information in the picture, G means G channel, records the green information in the picture, and B means B Channel, which records the blue information in the picture, and A represents the A channel, which records the transparency information of the picture; generally, each color component is represented by a one-byte uint8 type, and its value ranges f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/85H04N19/119H04N19/176
CPCH04N19/85H04N19/119H04N19/176
Inventor 张征王凯闫富松
Owner LUDONG UNIVERSITY
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