Method for automatically generating joint line network
An automatic generation and seam line technology, applied in the re-radiation of electromagnetic waves, radio wave measurement systems, image enhancement, etc., can solve the problems of inconvenient mosaic results, unclear effective mosaic areas, and error accumulation, and avoid intermediate results. generation, ensuring flexibility and efficiency, avoiding the cumulative effect of errors
Inactive Publication Date: 2009-03-18
WUHAN UNIV
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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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[0027] The present invention proposes a brand-new method for automatically generating a seamline network. The seamline network generated by the method can effectively divide the coverage area of each image and form an effective mosaic polygon of each image. This is convenient for the mosaic processing, and the mosaic image can be directly obtained according to the effective mosaic polygon of each image, which can ensure the flexibility and efficiency of the mosaic processing, avoid the accumulation of errors and the generation of intermediate results, and the processing results have nothing to do with the order of the images. A kind of automatic generation method of seamline network that the present invention proposes (the schematic diagram of its generation is as follows figure 1 with figure 2 shown), the steps are as follows:
[0028] 1. Obtain the effective range of each orthophoto, represented by a quadrilateral (a rectangle is a special case):
[0029] a. Search for ...
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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...
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IPC IPC(8): G06T5/50G06T7/60G01S17/89G06T7/49
Inventor 潘俊王密李德仁
Owner WUHAN UNIV