Image splicing method and device, equipment and storage medium

An image stitching and image technology, which is applied in the field of image processing, can solve the problems of slow matching speed, image angle of view that cannot meet actual needs, and excessive image size.

Active Publication Date: 2020-09-25
AEROSPACE INFORMATION RES INST CAS
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Problems solved by technology

However, limited by factors such as imaging equipment and technical remote sensing satellite surveying and mapping areas, the viewing angle of the image often cannot meet the actual needs. It is usually necessary to splicing multiple small sub-images with overlapping areas formed by ScanSAR into a wide scene image
When using the existing technology to stitch ScanSAR images, there are problems that the image is too large, too many feature points, and the matching speed is too slow

Method used

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  • Image splicing method and device, equipment and storage medium
  • Image splicing method and device, equipment and storage medium
  • Image splicing method and device, equipment and storage medium

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Embodiment Construction

[0018] Image stitching technology is a hot research topic in ScanSAR field. The problems in the stitching process of spaceborne ScanSAR images are manifested in two aspects:

[0019] The first aspect is that the original image resolution of the spaceborne ScanSAR is relatively high and the pixels are too many, which leads to the excessive amount of data processed during the stitching and the slow stitching speed. The size of an original satellite-borne ScanSAR image before stitching is between 1.5GB and 2GB, and each image to be stitched is composed of hundreds of millions of pixels. As a result, when the SIFT algorithm is used to extract feature points of the entire image, there will be too many feature points and the extraction speed is too slow.

[0020] The second aspect is that when extracting full image feature points from the original satellite-borne ScanSAR image, many wrong feature points will be extracted, which affects the accuracy of matching. The basis of image stitc...

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Abstract

The embodiment of the invention discloses an image splicing method and device, equipment and a storage medium. The method comprises the steps: obtaining K original images which are sequentially arranged according to a first dimension, and K is an integer greater than or equal to 1; reducing each original image to obtain K reduced images which are sequentially arranged according to the first dimension; determining a target image overlapping rate corresponding to two adjacent reduced images; cutting two corresponding adjacent reduced images according to the overlapping rate of each target imageto obtain an overlapping region between K-1 pairs of two adjacent reduced images; and splicing the K original images according to the overlapping regions of the K-1 pairs of adjacent reduced images.

Description

Technical field [0001] The embodiments of the application relate to image processing, and relate to but are not limited to a method, device, device, and storage medium for image splicing. Background technique [0002] Scanning Synthetic Aperture Radar (Scanning Synthetic Aperture Radar, ScanSAR) is an important working mode of spaceborne synthetic aperture radar. Its wide range of surveying and mapping capabilities are conducive to shortening the global observation period and monitoring the rapidly changing large-scale surface phenomena. However, due to the limitations of imaging equipment and technical remote sensing satellite mapping area, the viewing angle of the image often cannot meet actual needs. It is usually necessary to stitch together multiple small overlapping sub-images formed by ScanSAR into a wide scene image. When using the prior art to stitch ScanSAR images, there are problems of too large images, too many feature points, and too slow matching speed. Summary of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40G06T7/11
CPCG06T3/4038G06T7/11G06T2207/10044
Inventor 田江浩禹卫东张志敏王宇邓云凯王沛范怀涛
Owner AEROSPACE INFORMATION RES INST CAS
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