Medical ultrasonic image compression method based on the mixed wavelet coding

Abstract

The invention provides a medicinal ultrasonic image compressing method based on wavelet coding, the method comprises: 1) peforming wavelet coding on a medicinal ultrasonic image I, peforming wavelet transformation on an imaging region, i.e., WIA (I*MI), and peforming wavelet transformation on a background region, i.e., WBG(I*(1-MI) / S), wherein MI represents a shape mark of the imaging region, function W represents integer lifting wavelet transformation, the lower corner sign IA represents a wavelet which performs transformation on the imaging region, the lower corner sign BG of the function W represents a wavelet which performs transformation on the imaging region, S is a size parameter; 2) calculating a wavelet domain mark MW based on the shape mark MI of the imaging region of the ultrasonic image, calculating a mixed wavelet parameter by the wavelet domain mark MW; 3) encoding the mixed wavelet parameter by a wavelet parameter encoding algorithm and based on a gather dividing algorithm of a delamination tree, obtaining an image compressing result. The invention improves compressing rate of the image while ensuring that information in a medicinal ultrasonic image diagnosis region has no damage, and has a wide application.

Description

(1) Technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a medical ultrasonic image compression method. (2) Background technology [0002] With the diversification and specialization of modern medical imaging technology, the types and quantities of digital medical images are increasing, and its huge data capacity has caused storage and transmission problems. Image compression is to transmit or store images with as few coded symbols as possible under the premise of ensuring the necessary image quality, or to make the quality of the restored image as good as possible given the number of coded symbols. [0003] Common image compression methods include Huffman coding, predictive coding, and transform coding. Huffman coding completely constructs the codeword with the shortest average length of characters based on the probability of character appearance. The algorithm first scans the image data once, calculates the ...

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Problems solved by technology

[0005] The purpose of the present invention is to propose a method suitable for partially lossy compression of medical ultrasound images, which overcomes the problem of low compression rate in previous lossless wavelet coding compression methods, and ensures the lossless information in the image diagnosis area. Medical Ultrasound Image Compression Method Based on Hybrid Wavelet Coding

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