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Compressing and decompressing method of image of light emitting diode (LED) display screen

An LED display, image compression technology, applied in image communication, digital output to display devices, static indicators, etc., can solve problems such as inability to observe, and achieve the effect of simple decompression

Active Publication Date: 2011-03-16
UNILUMIN GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In fact, if there are slight errors in the original picture, and the errors cannot be observed on the LED display, then these small errors are acceptable, and the neglect of small errors brings a huge space for image compression

Method used

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  • Compressing and decompressing method of image of light emitting diode (LED) display screen
  • Compressing and decompressing method of image of light emitting diode (LED) display screen
  • Compressing and decompressing method of image of light emitting diode (LED) display screen

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Embodiment Construction

[0044] In order to describe in detail the technical content, structural features, achieved objectives and effects of the present invention, the following is a detailed description in conjunction with the embodiments and accompanying drawings.

[0045] See Figure 1~Figure 10 , The image compression method of the LED display screen of the present invention includes the following steps:

[0046] 3) Run the first compression mode: select I(2+3i, 2+3j) as the center pixel, determine the coordinates of the surrounding pixels of the center pixel, and compare the pixel value of the center pixel with the pixel values ​​of the surrounding pixels ; The comparison result obtained by comparing the pixel value of the center pixel with the pixel value of the surrounding pixels is compared with the allowable upper limit of error k, if the comparison result is greater than or equal to k, the pixel value of the pixel is retained, if the comparison result If it is less than k, the pixel value of th...

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Abstract

The invention discloses a compressing and decompressing method of an image of a light emitting diode (LED) display screen. The compressing method comprises the following steps: 1) determining a coordinate; 2), setting an error permission upper limit value; 3) operating a first compression mode; 4) operating a second compression mode; 5) operating a third compression mode; 6) operating a fourth compression mode; 7) operating a fifth compression mode; 8) operating a sixth compression mode; 9) operating a seventh compression mode; 10) operating an eighth compression mode; 11) operating a ninth compression mode; and 12) selecting compression modes for compression. In the invention, certain error coefficients are directly set in a space domain to compress the image, one compression mode with the best compression effect is selected in the nine compression modes through the trial operation of the nine compression modes, and finally, the compressed image is decompressed. The decompression is simple and dim edges do not occur.

Description

Technical field [0001] The invention relates to the field of LED display screens, in particular to an image compression and decompression method for LED display screens. Background technique [0002] In the development process of LED display, remote control of LED display is more and more widely used. In the process of remote control, data transmission is unavoidable. In order to improve the efficiency of data transmission, it is necessary to compress and decompress data. [0003] Picture compression coding is one of the important contents of digital image processing. The basic principle of compression is to remove redundant information in a picture. Because there are many correlations between pixels in a picture, the amount of information can be deleted through certain program operations. The same pixel achieves the purpose of reducing redundant compressed images. [0004] The image compression process can be divided into lossless compression and lossy compression according to whet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G5/36H04N7/26G06F3/14H04N19/12H04N19/182
Inventor 林洺锋王伟张春旺陈之良康敏武
Owner UNILUMIN GRP