A Method for Processing and Stitching Interferometric Synthetic Aperture Sonar Images
A technology of interferometric synthetic aperture and synthetic aperture, which is used in image data processing, graphic image conversion, instruments, etc., to achieve the effect of simple processing method, good continuity, and strong internal information contrast.
Active Publication Date: 2019-01-25
NAVAL UNIV OF ENG PLA
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However, in order to display the processing results of the large-scale imaging area, it is necessary to stitch the images. At present, there is no research on the stitching of the processing results of the interferometric synthetic aperture sonar in China. How to display the processing results of the interferometric synthetic aperture sonar, including amplitude and elevation, Need to find a simple and easy way
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0020] The process of the processing and splicing method of the interference synthetic aperture sonar image of the present invention is as follows figure 1 shown, including the following steps:
[0021] S100. According to the parameters of the interferometric synthetic aperture sonar system, the wavelength λ, the array element length D and the farthest imaging distance R, calculate the synthetic aperture length at the imaging distance And the original echo data in the azimuth direction according to M times the synthetic aperture length For block, M≥2. Setting the block size to M times the length of the synthetic aperture is mainly limited by the processing power of the computer, and at least two synthetic aperture length data are required. The setting of the overlapping size of adjacent blocks comprehensively considers the simpli...
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The invention relates to a processing and splicing method for an interferometric-synthetic-aperture sonar image. The method comprises: block division is carried out on received echo data in an azimuth direction and interference signal processing is carried out on original data after block division, thereby obtaining a range and elevation of an effective imaging region; and splicing and displaying are carried out on continuous range blocks and elevation blocks in an azimuth direction according to a time sequence. The method is simple. Because color information is generated for each small two-dimensional or three-dimensional image block during the data splicing process, the contrast ratio of internal information of the large range data block after splice is high and the boundaries between different imaging blocks are obvious. No original elevation data are changed during the splicing process and the color information is generated only based on the elevation value; and for the spliced elevation data, smooth transition between different blocks is realized, so that continuity of elevation changes is good.
Description
technical field [0001] The invention relates to image processing, in particular to a processing and splicing method of an interference synthetic aperture sonar image, and belongs to the field of interference synthetic aperture sonar image processing. Background technique [0002] Interferometric synthetic aperture sonar (InSAS) is to add one (or more) receiving matrix on the basis of synthetic aperture sonar, and obtain the height information of the scene by comparing the height of the phase, so as to obtain the three-dimensional image of the scene. InSAS combines the advantages of synthetic aperture sonar resolution independent of imaging distance and operating frequency and high precision of interferometric bathymetry. To improve the identification ability of mines, it divides the received original echo data into blocks, then performs interference processing, and finally displays the results (including the amplitude and elevation of the imaging area). However, in order to...
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IPC IPC(8): G06T3/40
CPCG06T3/4038
Inventor 钟何平唐劲松黄攀张森田振吴浩然徐魁丘昌镇
Owner NAVAL UNIV OF ENG PLA