JPEG (Joint Photographic Experts Group) image compression method, system and equipment and storage medium

An image compression, current image technology, applied in the direction of image communication, digital video signal modification, electrical components, etc., can solve the problems of reduced image quality, low average bandwidth utilization, etc., to achieve the effect of improving image quality

Active Publication Date: 2022-07-22
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Shortcomings of prior art: 1, this method is comparatively simple, and realization difficulty is little, but can reduce image quality greatly, and average bandwidth utilization rate is also lower simultaneously; 2, although this method can guarantee frame rate stability, promptly video image does not Stuttering, but severely degrades image quality

Method used

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  • JPEG (Joint Photographic Experts Group) image compression method, system and equipment and storage medium
  • JPEG (Joint Photographic Experts Group) image compression method, system and equipment and storage medium
  • JPEG (Joint Photographic Experts Group) image compression method, system and equipment and storage medium

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Embodiment Construction

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the specific embodiments and the accompanying drawings.

[0031] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for the purpose of distinguishing two entities with the same name but not the same or non-identical parameters. It can be seen that "first" and "second" It is only for the convenience of expression and should not be construed as a limitation to the embodiments of the present invention, and subsequent embodiments will not describe them one by one.

[0032] In a first aspect of the embodiments of the present invention, an embodiment of a method for JPEG image compression is proposed. figure 2 Shown is a schematic diagram of an embodiment of the method for JPEG image compression p...

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Abstract

The invention provides a JPEG (Joint Photographic Experts Group) image compression method, system and device and a storage medium, and the method comprises the steps: responding to a condition that a current image frame is in a starting frame, and coding the current image by using a standard quantization coefficient table; in response to the situation that the current image frame is not in the starting frame, calculating a weighted average image data length of adjacent frames with a first preset number, and calculating a coding factor according to the weighted average image data length; predicting the bandwidth factor of the next frame according to the change condition of the bandwidth of the adjacent second predetermined number of frames; and determining a quantization parameter of the current image frame through a quantization table according to the relationship between the coding factor and the bandwidth factor, and updating the quantization parameter to a quantization table corresponding to the next frame. According to the invention, the coding process is optimized frame by frame when the system bandwidth changes and the image characteristics change, so that the coded image is always in the allowed highest image quality.

Description

technical field [0001] The present invention relates to the field of chip design, and more particularly, to a method, system, device and storage medium for JPEG image compression. Background technique [0002] JPEG video image compression is a commonly used international standard for video image compression, used to compress continuous-tone still images (including grayscale images and color images). JPEG is an acronym for Joint Photographic Experts Group, a standard designed to support a variety of applications based on continuous-tone still image compression. The image to be compressed can be in any color space, and the user can adjust the compression ratio to make the compression effect reach or approach the top compression performance in the industry, with good resolution and restoration quality. Therefore, when a large number of images need to be stored and transmitted, JPEG image compression is very necessary. [0003] like figure 1 As shown, it is a classic JPEG ima...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/124H04N19/176H04N19/186H04N19/134H04N19/136
CPCH04N19/124H04N19/176H04N19/186H04N19/134H04N19/136
Inventor 孙旭周玉龙刘刚李拓
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD
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