Seam line network generating method suitable for convex polygonal image effective ranges

Abstract

The present invention relates to a seam line network generating method suitable for convex polygonal image effective ranges during mosaic of multiple digital orthophotos in an area range, comprising the following steps: obtaining an effective range of each orthophoto, and expressing the effective ranges with convex polygons; calculating segmentation lines between adjacent images; calculating an effective mosaic convex polygon of each image; and generating a seam line network. With the steps, mosaic treatment can be implemented on the basis of the generation of the seam line network; pixels contributing to mosaic in every image, seam lines relating to every image and images relating to each seam line can be conveniently obtained and a mosaic result can be directly generated; flexibility and efficiency of the mosaic can be guaranteed and error accumulation as well as intermediate results can be avoided, and a treatment result is independent of orders of the images. With the seam line network generating method, a problem of generating the seam line network for convex polygonal image effective ranges during mosaic of multiple digital orthophotos in an area range can be effectively solved.

Description

technical field [0001] The invention belongs to the field of photogrammetry and remote sensing image processing, and relates to a method for generating a seam line network suitable for convex polygons in the effective range of images when mosaicking a plurality of digital orthophoto images within an area. Background technique [0002] Photogrammetry and remote sensing have opened up a new perspective for humans to understand the earth, and provided humans with new methods and means to understand the world from multi-dimensional perspectives and macro scales. At present, they have played an increasingly important role in national economy, social development, and national defense construction. important technical support. As the most important basic data product of photogrammetry and remote sensing, digital orthophoto product is currently the most valuable digital product. Image mosaic is one of the key steps in generating digital orthophoto products. It is a process of splic...

AI Technical Summary

Problems solved by technology

The traditional two-two mosaic seamline generation method does not consider how to connect individual seamlines to form a seamline network. Although this approach simplifies the generation of seamlines, it does not take the overall consideration into account and is not conducive to mosaic data. Organization, so that the effective mosaic area of ​​each image in the mosaic process is not clear, it is not convenient to directly generate the final mosaic result, which affects the processing efficiency, and there is error accumulation. At the same time, the mosaic result is related to the order of processing. Different image sequences will lead to different Mosaic results, which are especially evident in the process of mosaicing large areas of multiple images

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