Serial section image incremental compression storage method based on three-dimensional model

Abstract

The invention discloses a serial section image incremental compression storage method based on a three-dimensional model. The serial section image incremental compression storage method comprises thesteps that an original image storage space is established; a blank binary file is generated on the original image storage space; a first image is stored on the original image storage space to serve asa reference for subsequent images; as for the subsequent images, the previous image is adopted for incremental processing, and the two images are directly subjected to XOR operation; as for a generated difference image, a sparse matrix compressing and storing method is adopted for compressing; and byte contents generated after secondary compression are counted, four bytes are used in the binary file to store the total number of bytes, then contents of the binary file are filled with the compressed byte contents, the above steps are repeated for the next image, and a separated binary compressed file is generated. According to the method, consideration is given to section image continuity, and therefore the higher compression ratio is achieved compared with a traditional single image compression algorithm.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for incrementally compressing and storing images of continuous slices based on a three-dimensional model. Background technique [0002] The full name of DLP (Digital Light Processing) is "Digital Light Projection" technology. Based on the DLP printing method and the SLA photocuring molding method, both use liquid photosensitive resin as raw material. The difference is that DLP uses a digital projector as a light source and uses the projection image It can be cured and molded on one side at one time. Generating slice images from 3D models is one of the key technologies for rapid prototyping of surface exposure machines. [0003] The photocuring process of DLP technology is divided into the following steps. 1. Use CAD technology to generate a three-dimensional solid model; 2. Use computer software to slice the model; 3. Use the generated two-dimensio...

AI Technical Summary

Problems solved by technology

[0006] 1) Lack of uniform evaluation criteria and advanced knowledge;

[0007] 2) The calculation of the extraction system is relatively large;

[0008] 3) The wavelet change image compression coding algorithm, etc., has the problem of low work efficiency;

[0009] 4) Contradiction between image accuracy and processing speed;

[0011] In addition, in terms of binary file compression technology, popular lossless compression algorithms include Huffman coding, hash coding, LZW compression algorithm, arithmetic compression method and run-length algorithm, etc. Compression is all compressed by one byte, and its compression efficiency and application range are limited to a certain extent

For example, for some compressed data, there is no possibility of further compression

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