Picture segmentation method based on JPEG document flow

Abstract

The invention discloses a picture segmentation method based on JPEG document flow. The method comprises the following steps: the step 1 in which the picture size, re-entry interval and sampling factor information can be acquired according to the JPEG coding theory and the data stream format thereof; the step 2 in which the picture segmentation number is calculated according to the JPEG picture size and read re-entry interval number; and the step 3 in which segmentation is performed on a JPEG picture according to the segmentation number, and segmentation reading is performed on the JPEG picture circularly. According to the method of the invention, the problem of size difference and especially problems of large memory usage, large time consumption and low efficiency with oversized pictures can be effectively solved, and advantages of less memory usage and stability can be realized.

Description

technical field [0001] The invention belongs to the technical field of image segmentation, and relates to a method for image segmentation based on JPEG file flow. Background technique [0002] With the continuous advancement of technology, the penetration rate of digital cameras is also increasing, and the number of digital photos has shown explosive growth. Large-scale wedding photos, photo photos and advertising photos are very common. For printing companies, it is very important to solve the problem of how to read oversized pictures in order to output and print digital photos of various sizes and specifications on photo paper of specified specifications. [0003] The problem of reading in very large images belongs to the problem of image segmentation. Prior to this, the research on image segmentation algorithms has a history of decades and has always been highly valued by people. There have been a lot of research results on the principles and methods of image segmentatio...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of picture segmentation method based on JPEG file flow, solve the problems existing in the prior art when reading pictures with different sizes, especially oversized pictures, occupying more computer memory, taking a long time to read in, and working inefficiency

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