Method for automatically generating joint line network

Abstract

The invention relates to an automatic generation method for a seaming network under the condition of a mosaic treatment to digital ortho images, comprising the following steps: effective ranges of various digital ortho images are acquired and represented in the form of quadrangles; a partition line between every two images with an overlapped area is calculated; effective mosaic polygons of various images are calculated; the seaming network is generated. After generation of the seaming network through above steps, the mosaic treatment can be performed on the basis, and pixels in each image which are useful to the mosaic treatment can be conveniently obtained; seamings related to each image and images related to each segment of seaming are convenient for direct generation of mosaic results, and mosaic flexibility and efficiency can be guaranteed and error accumulation and generation of intermediate results are avoided; moreover, treatment results have no relationship with image sequence. The invention can effectively solve the problem of automatic generation of the seaming network under the condition of the mosaic treatment of a plurality of remote sensing images within the area coverage.

Description

technical field [0001] The invention belongs to the field of image processing and analysis, and relates to a method for automatically generating a seam line network when mosaicking digital orthophoto images. Background technique [0002] Image mosaic is the basic function of remote sensing image processing. Since the coverage area of ​​a single scene image is small, in many practical applications it is often necessary to stitch multiple digital orthophotos together to form a larger image, that is, to Image mosaicing for analysis of large areas. The traditional two-by-two mosaic mode is gradually replaced by the region-wide multi-image overall mosaic due to efficiency problems. [0003] Image mosaicking is usually carried out based on seamlines, and the automatic generation of seamlines is a key link in multi-image mosaic processing within a region. Most of the existing seamline generation methods only focus on two adjacent images, and do not consider how to connect individ...

AI Technical Summary

Problems solved by technology

Most of the existing seamline generation methods only focus on two adjacent images, and do not consider how to connect individual seamlines to form a seamline network. Although this approach simplifies the generation of seamlines, its Insufficient overall consideration is not conducive to the mosaic data organization, making the effective mosaic area of ​​each image in the mosaic process unclear, and 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 and the processing order Related, different image sequences will lead to different mosaic results, which is especially evident in the mosaic process of multiple images in the region

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