JPEG (Joint Photographic Experts Group) image compression method, device and equipment and readable medium

Abstract

The invention discloses a JPEG (Joint Photographic Experts Group) image compression method, which comprises the following steps of: reading a current sub-block as a reference sub-block, performing DCT (Discrete Cosine Transform) compression based on the reference sub-block, and storing compressed image data into a memory; reading the next sub-block as an adjacent sub-block, and judging whether the source image data of the adjacent sub-block is equal to the source image data of the reference sub-block; in response to the fact that the source image data of the adjacent sub-block is equal to the source image data of the reference sub-block, adding one to the omitted compression number, and judging whether the omitted compression number is greater than a preset number of times or not; in response to the condition that the omitted compression number is not greater than the preset number of times, taking the compressed image data of the reference sub-block as the compressed image data of the adjacent sub-blocks and storing the compressed image data into a memory; and taking the adjacent sub-block as a new reference sub-block, taking the compressed image data of the adjacent sub-block as the compressed image data of the reference sub-block, and returning to the step of reading the next sub-block as the adjacent sub-block. The invention further discloses a JPEG image compression device, computer equipment and a readable storage medium.

Description

technical field [0001] The invention relates to the technical field of image compression, in particular to a JPEG image compression method, device, equipment and readable medium. Background technique [0002] With the rapid development of microelectronics technology, computer technology, and communication technology, human society has gradually entered the information age. Images are widely used as information carriers. Visual information accounts for 60% of the information received by humans. The amount of image data after digitization is very large. In the process of image transmission and storage, image compression is necessary and important. [0003] JPEG (Join Photographic Experts Group) is the first coding algorithm of the international color static image compression standard formulated by the Joint Photographic Experts Group. It is widely used because of its good image quality and high compression rate. The main steps include DCT (Discrete Cosine Transform, discrete ...

AI Technical Summary

Problems solved by technology

[0005] In the JPEG image compression algorithm, DCT, quantization, encoding, etc. are performed on each sub-block, which will cause repeated calculations, resulting in a large amount of calculations and a waste of computing resources.

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