Three-dimensional image splicing method based on geography coding and multidimensional calibration
A geocoding and three-dimensional image technology, which is applied to the details of image stitching, image enhancement, image analysis, etc., can solve the problems of multi-dimensional image spatial position disorder, stitching result error, image position deviation, etc.
Active Publication Date: 2016-04-13
THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology
After motion compensation signal processing and multi-parameter correction, most of the attitude errors can be compensated, but factors such as flight offsets and platform motion errors will cause large deviations in the image position of the same target under different survey lines
Direct mosaicing and overlaying of spatial positions will cause disordered spatial positions of multi-dimensional images, resulting in wrong stitching results and poor visual effects
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[0031] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0032] The three-dimensional image mosaic method based on geographic coding and multi-dimensional calibration described in the present invention, the specific steps are as follows:
[0033] 101) Three-dimensional spatial location geocoding
[0034] The three-dimensional spatial position geocoding of sonar image volume data is carried out by dragging body position estimation and sonar parameter correction.
[0035] 1 Estimate the position of the sonar drag body
[0036] Towing body position data filtering: select three adjacent track points i, i+1, and i+2 in turn to form a triangle, take i, i+2 as the bottom edge, and calculate the intersection of i+1 point and the bottom edge The vertical line equation, the coordinates of the split point P are obtained with a split ratio of 1:2 and assigned to the track point i+1, which can better maintain the distance rat...
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The invention discloses a three-dimensional image splicing method based on geography coding and multidimensional calibration, comprising steps of performing three-dimensional space position geography coding of the sonar image body data through towed body position calculation and sonar parameter correction, choosing an cruising-depth dimension slice from a multi-measurement-line superposition area image, obtaining the translation amount of the depth dimension through matching of the image characteristics, choosing a cruising-orientation dimension slice, calculating the translation amount and an angle rotation amount through an object long shaft image characteristic, and realizing the multi-dimension-calibration splicing of the three-dimensional image through the multi-dimension calibration of the geography coding of the three-dimension space. The invention performs splicing processing on the three-dimension image which is generated by the sonar platform and contain the four-dimension information of cruising position, the orientation position, the depth position and the reflection intensity value, and creatively promotes the three-dimensional image splicing method based on geography coding and multidimensional calibration.
Description
technical field [0001] The invention belongs to the category of sonar image data post-processing technology, and mainly relates to a three-dimensional image mosaic method based on geographic coding and multi-dimensional calibration. Background technique [0002] Image stitching technology refers to the technology of stitching several overlapping images into a large seamless high-resolution image, which has been widely used in image processing fields such as remote sensing, radar, medicine, optics, and digital video. This technology mainly includes two parts: image registration and image fusion. Image registration is the core part of image stitching. It specifically refers to using a certain matching strategy to find out the corresponding position of the template or feature point in the image to be stitched in the reference image. , and then determine the transformation relationship between the two images. Registration algorithms can be roughly divided into model-based metho...
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Login to View More IPC IPC(8): G06T19/20G06T7/00G01S15/88G01S15/89
CPCG01S15/88G01S15/89G06T19/20G06T2200/04G06T2200/32G06T2207/20221
Inventor 朱必波芦俊薛欢欢丛卫华蒋富勤汲夏傅翔毅
Owner THE 715TH RES INST OF CHINA SHIPBUILDING IND CORP