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High-speed JPEG image compression method based on TMS320C6678 chip

A TMS320C6678, image compression technology, applied in the field of image processing, can solve the problems of large loss of high-frequency components of images, reduction of compression quality, and reduction of compression efficiency, so as to avoid poor compression quality, ensure compression quality, and improve compression efficiency.

Active Publication Date: 2017-08-29
XIDIAN UNIV
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Problems solved by technology

[0007] However, there are differences between image blocks and blocks. If the existing standard quantization table is used to uniformly quantize each sub-block, there will be the following problems: some sub-blocks have more details, more high-frequency components, and low-frequency components. less, if the high-frequency components are quantized with a larger quantization step size according to the existing standard quantization table, the loss of the high-frequency components of the image will be large, resulting in a decline in compression quality; some sub-blocks have less details, There are few low-frequency components and many high-frequency components. If the low-frequency components are quantized with a smaller quantization step size according to the existing standard quantization table, the data redundancy will be large and the compression efficiency will be reduced.

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  • High-speed JPEG image compression method based on TMS320C6678 chip
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  • High-speed JPEG image compression method based on TMS320C6678 chip

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Embodiment Construction

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0028] figure 1 Shown is a schematic flow chart of a high-speed JPEG image compression method based on the TMS320C6678 chip provided by the embodiment of the present invention.

[0029] Such as figure 1 Shown, the high-speed JPEG image compression method based on TMS320C6678 chip that the embodiment of the present invention provides comprises the following steps:

[0030] Step 1, read the image to be compressed, the image to be compressed is a two-dimensiona...

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Abstract

The invention belongs to the technical field of image processing and discloses a high-speed JPEG image compression method based on the TMS320C6678 chip. The method comprises the following steps: reading a to-be-compressed image; continuously dividing the data of the to-be-compressed image into 8 segments of data blocks along the distance direction in a non overlapping manner, scanning the respective data blocks by the 8 processing cores of the TMS320C6678 chip at the same time to accomplish image blocking; performing DCT transformation on the blocks; determining correction quantization tables corresponding to the blocks, and quantifying the blocks by using the correction quantization tables; performing Huffman entropy encoding on the quantized blocks; and determining marking code according to the JPEG standard and the format of the to-be-compressed image, and forming bit streams through the marking codes and the encoded data of the blocks. By adoption of the high-speed JPEG image compression method, the data redundancy can be reduced, the processing time of image compression can be shortened, and high-speed JPEG image real-time compression is realized.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a high-speed JPEG (Joint Photographic Expert Group, Joint Photographic Expert Group) image compression method based on a TMS320C6678 chip, which can be applied to high-speed JPEG image compression processing of large-scale radar echo data. Background technique [0002] Efficiency and real-time performance are the two main issues in computer processing of image information, so how to quickly store and transmit images on the premise of ensuring image quality has become the key to the problem. Image compression technology emerges as the times require. Image compression technology reduces the amount of data represented by images by removing redundant information in image data, thereby storing and transmitting image data in a more efficient format to meet the high efficiency and real-time requirements of image processing. sex. [0003] In the existing image compression techn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/122H04N19/124H04N19/13H04N19/176H04N19/625
CPCH04N19/122H04N19/124H04N19/13H04N19/176H04N19/625
Inventor 王虹现陈兴林范明谭高伟
Owner XIDIAN UNIV
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