Lossless compression coding method for pure trichromatic picture data

A lossless compression and coding method technology, applied in image communication, digital video signal modification, electrical components, etc., can solve problems such as slow speed, long compression time, incomplete pictures, etc., to maintain integrity and lossless, improve picture data compression rate , Overcome the effect of low image compression compression rate

Active Publication Date: 2018-03-13
广州物启科技有限公司
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[0007] Fractal compression (en: Fractal compression); looking for self-similar parts within a graph leads to excessive compression time
[0008] Compression and decompres...

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  • Lossless compression coding method for pure trichromatic picture data

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[0032] Image compression refers to reducing the amount of data required to represent a digital image. The reason why image data can be compressed is because there is redundancy in the data. The redundancy of image data is mainly manifested as: spatial redundancy caused by the correlation between adjacent pixels in the image; temporal redundancy caused by the correlation between different frames in the image sequence; correlation caused by different color planes or spectral bands. spectrum redundancy. The purpose of data compression is to reduce the number of bits required to represent data by removing these data redundancies.

[0033] The lossless compression coding method for pure three-primary-color picture data of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0034] A lossless compression encoding method for pure three-primary-color image data, in which each pixel in the image to be compressed is processed in seque...

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Abstract

The invention relates to a lossless compression coding method for pure trichromatic picture data. The method comprises the following steps: comparing pixel value data of each pixel in a picture to becompressed with a specified pixel value, if the pixel value data of each pixel are equal to the specified pixel value, then recording as decimal 1, otherwise recording as decimal 0 and recording the value of the pixel; and sequentially comparing the decimal 1 with the decimal 0 for many times and combining the decimal 1 and the decimal 0 into one byte through an algorithm and recording the byte, circularly comparing until the pixel data are picture data file tails to be compressed, and finally generating a compressed new picture data file including the specified pixel value, all synthesized byte data and all stored pixel values. The invention provides a picture data lossless compression method for the lossless compression coding method for the pure trichromatic picture data, which can overcome the problems of low picture compression rate, insufficient compression effect and lossy compression in the prior art; and even scattered discontinuously repeated pixels can be recorded by using fewer bytes, so that the picture data compression rate is improved, and the picture data are kept complete and lossless.

Description

technical field [0001] The invention relates to the technical field of picture compression, in particular to a lossless compression encoding method for pure three-primary-color picture data. Background technique [0002] Currently, known image compression methods include lossy compression and lossless compression. [0003] The lossless compression method usually has run-length encoding. The basic principle is to represent adjacent pixels with the same color value in a scan line with two bytes. The first byte is a count value, which is used to specify the number of pixel repetitions. ; The second byte is the value of the specific pixel. The lossless compression method can better preserve the quality of the image, but if the pixels of the picture are variable, the pixel positions of the same value are also variable and scattered, which will result in the number of bytes used to record the count value of the number of repetitions of the specified pixel becomes larger, and two...

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Application Information

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IPC IPC(8): H04N19/182H04N19/186H04N19/42H04N19/423
Inventor 骆演达
Owner 广州物启科技有限公司
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