JPEG picture mosaicing-based oversize picture synthesis method

Abstract

The invention discloses a JPEG picture mosaicing-based oversize picture synthesis method. The width and height of a page to be laid out are set, a rectangular part layout algorithm is adopted to lay out pictures to be laid out, and meanwhile, layout information is recorded; a JPEG picture compression and sampling mode is set; canvases are generated by partitioning, and the number k of the generated canvases is calculated; the pictures which are already laid out are painted on each canvas in turn; on the successfully painted canvases, a JPEG picture is generated according to the set picture compression and sampling mode, and the data information of the picture is stored in a memory; the bytes in the modified header information of the JPEG picture, which represent the width and height of the picture, are modified as the total width and total height of the canvases, and finally, an oversize picture is generated from the byte stream in the memory. The memory usage of the method is small, the method is stable, and the time complexity and the space complexity are low.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a super-large picture synthesis method based on JPEG picture splicing. Background technique [0002] With the continuous advancement of science and technology, the continuous improvement of people's living standards, the availability and popularity of digital cameras have also continued to increase, and the number of digital photos has shown explosive growth [1]. Today's large wedding photos, portrait photos and advertising pictures have become very common. For printing companies, improving the utilization rate of printing photo paper, saving resources and cost is their goal. Therefore, a very challenging problem they face is the problem of splicing a large number of small photos, that is, how to place as many photos as possible on a canvas without overlapping, so as to maximize the utilization of photo paper, and synthesize a large number of photos. An ext...

AI Technical Summary

Problems solved by technology

When the memory space is not enough to store the BMP image data, the disk file is needed as an intermediate file, which will generate a large amount of input and output, and will consume a lot of time, especially the current operating system and programming tools have limited the size of the BMP canvas that can be generated. Therefore, for very large pictures, the efficiency of ordinary computer stitching is very low

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