Cartoon image compression method based on explicit hybrid harmonic diffusion

Abstract

The invention, which relates to the image processing and application field, provides a cartoon image compression method based on explicit hybrid harmonic diffusion. The method comprises the steps of feature line extraction, feature line position coding, image color coding, feature line position decoding, and image color decoding. In order to solve problems of poor practicability and the like due to limited color expression capability and long decoding time of the existing partial-differential-equation-based second-generation image compression algorithm, the invention provides a cartoon image compression method based on explicit hybrid harmonic diffusion. With simultaneous utilization of harmonic and biharmonic diffusion, diversified color changes in the image can be coded well, thereby avoiding solution of a large linear system during decoding and realizing real-time decoding. Explicit approximation is carried out on the biharmonic process by using a green function, thereby improving the decoding speed substantially. Moreover, the algorithm is clear; the effect is obvious; the real-time performance is high; and the result is robust. After industrialization, the business value of the unit flow in the mobile phone animation industry can be improved substantially and the user experience is also improved.

Description

technical field [0001] The invention relates to image processing applications, in particular to a cartoon image compression method based on explicit mixing and diffusion. Background technique [0002] With the development of the mobile Internet, images are transmitted more and more frequently. Since the bitmap is a dot matrix image stored in units of pixels, the capacity is relatively large, and limited by the network bandwidth, the transmission of the image makes the network burden heavy, and the time-consuming loading seriously affects the real-time performance of the interaction. In a mobile Internet environment that focuses on the business value of unit traffic, how to effectively compress images without affecting image quality is particularly important. [0003] Traditionally, most image compression methods (the first generation compression methods) rely on related technologies based on classical information theory, adopt the architecture of transformation first and th...

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Problems solved by technology

[0016] The purpose of the present invention is to solve the problems of limited color expression ability and long decoding time in the existing second-generation image compression algorithm based on partial differential equations, and provide a clear algorithm, significant effect, and real-time performance. Strong, robust results, a cartoon image compression method based on explicit hybrid harmonic diffusion that can greatly increase the business value of mobile animation industry unit traffic, improve user experience, and promote the vigorous development of the industry after industrialization

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