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Image compression method and device based on run-length encoding (RLE)

A technology of image compression and image compression, which is applied in image communication, television, electrical components, etc., can solve the problems of large data length and increased data volume, and achieve the effect of large compression ratio

Active Publication Date: 2013-05-29
NEUSOFT CORP
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Problems solved by technology

[0010] However, in practical applications, the RLE algorithm still has the following problems: when the pixel value is extreme, that is, in the case of bad data with different adjacent pixel values, the length of the encoded data will be greater than the length of the encoded data. Case
In this case, not only the data is not compressed, but the amount of data will be increased

Method used

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  • Image compression method and device based on run-length encoding (RLE)
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  • Image compression method and device based on run-length encoding (RLE)

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Embodiment Construction

[0032] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0033] Since mobile phones are mainly used for communication with vehicle-mounted devices at present, in the following descriptions of the specific embodiments of the present invention, "smart phone" and "mobile device" all refer to the target carrier used by the user to access the mobile Internet. "Smartphone" can be understood as one but not the only specific form of "mobile equipment".

[0034] In the actual implementation of MirrorLink, most of them use 16-bit pixel format for transmission. Therefore, in the following embodiments, the 16-bit pixel...

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Abstract

The invention provides an image compression method and device based on run-length encoding (RLE). The image compression method includes that whether pixel values of adjacent pixels in an image to be compressed are identical is sequentially compared and judged, the zone bit in the pixel format is set to be the value adopting RLE and RLE is performed on yes judgment, otherwise the zone bit is set to be the value not adopting RLE and RLE is not performed; during decoding, whether RLE is adopted is judged according to the zone bit in the pixel format of a pixel to be decoded, and RLE is adopted on yes judgment; and the zone bit is the bit with the smallest color display influence caused by G in the red, green and blue (RGB) pixel format. The image compression method and device can solve the problem of the traditional RLE algorithm of data quantity increasing after coding on some conditions, reach a compression ratio larger than that of the RLE algorithm only by losing little pixel accuracy, and are simple and convenient due to the fact that only shifting and bit manipulation are adopted in the whole encoding and decoding processes.

Description

technical field [0001] The present invention relates to the technical field of image data compression, and more specifically, to an RLE-based image compression method and device. Background technique [0002] MirrorLink is a technology that integrates mobile devices such as smartphones with in-vehicle terminals. This technology transmits the screen display content and sound of mobile devices such as smartphones to the vehicle-mounted terminal, and at the same time transmits the control signals on the vehicle-mounted terminal back to mobile devices such as smartphones, realizing the functions of using mobile devices such as smartphones on the vehicle-mounted terminal. [0003] figure 1 It is a schematic diagram of data transmission between an existing smart phone and a vehicle terminal. from figure 1 It can be seen that the data types transmitted between mobile devices such as smartphones and vehicle-mounted terminals mainly include screen display data, sound data, and con...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N19/44
Inventor 聂山人杨明张翼张骞郭海宇
Owner NEUSOFT CORP
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