Rounded interested area in digital image, and compression algorithm

Abstract

A compressing algorithm of circular interest region in digital image includes deriving mask code calculation formula corresponding to circular interest region and improving SPIHT algorithm to obtain image compression algorithm suitably to be used on circular interest region.

Description

technical field [0001] The invention proposes a circular region of interest in a digital image and its compression algorithm, which better solves the contradiction between the compression ratio and the quality of the reconstructed image, and can be applied to image interactive processing, telemedicine, distance education, remote measurement, space Explore many aspects related to image processing that arise from the exploration. Background technique [0002] The JPEG2000 standard defines two Region of Interest (ROI) technologies [1] : Maximum displacement method and general displacement method. In the general displacement method, the coefficients related to the region of interest are promoted to a higher bit plane (MSB), while the coefficients related to the background area are placed on a lower bit plane. When encoding and decoding images, the The scanning of the coefficients is always carried out step by step from the most significant bit plane to the least significant bi...

AI Technical Summary

Problems solved by technology

However, human vision is usually centered on a certain point, and the circle diverges. In other words, the area of ​​interest of the user is more similar to a circle, and the rectangular area of ​​interest does not conform to human visual characteristics.

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