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Image splicing method based on hybrid transformation

A technology of hybrid transformation and image stitching, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of large dependence on parameter selection and suboptimal similarity transformation, and achieves reduction of perspective distortion, saving calculation amount, and good alignment. The effect of precision

Pending Publication Date: 2019-04-19
TIANJIN UNIV
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Problems solved by technology

Lin et al. (proposed a method called "as natural as possible image stitching" for image stitching technology) [5] proposed that in the SPHP (Shape-PreservingHalf-Projective, half-projection method based on shape protection) method for parameter selection The dependence is large, and the global similarity transformation used in the SPHP (Shape-Preserving Half-Projective method) method is estimated by all matching feature points, if there are multiple different objects in the overlapping area plane, the obtained similarity transformation is not optimal

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  • Image splicing method based on hybrid transformation
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[0054] The invention belongs to the field of digital image processing. Specifically, an image stitching method based on a hybrid transformation model. Due to the high price of wide-angle lens and scanning camera, an image stitching technology is proposed to ensure both the field of view and resolution in the panorama. Moreover, the splicing of multiple partial images is used to obtain the overall image of some scenes or objects, so that in-depth research can be carried out from the whole.

[0055] In recent years, the development of science and technology has advanced by leaps and bounds, and image stitching technology has been widely used in many fields such as virtual reality, intelligent transportation, disaster warning, military operations, and medical treatment. The current image stitching technology mainly solves the problem of registration accuracy in overlapping areas, but the accompanying excessive deformation of non-overlapping areas is undesirable, and the existing...

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Abstract

The invention belongs to the field of digital image processing, and provides a technical scheme for solving the problem of excessive deformation of a non-overlapping region, so that an obtained spliced image has a better effect on the overall shape. Therefore, the technical scheme adopted by the invention is as follows: The image splicing method based on hybrid transformation comprises the following steps: firstly, extracting and matching SIFT (scale invariant feature transform) and scale invariant consistency characteristics of n disordered input images, selecting all to-be-spliced images with overlapped areas for each image, and then using a mobile direct linear transformation Moving-to-splicing method to carry out Moving-to-linear transformation on the to-be-spliced images; combining DLT with grid division to estimate a local projection transformation matrix of each grid, then acquiring an optimal global similarity transformation matrix through screening, then the global similaritytransformation matrix and the local projection transformation matrix are combined for mixed transformation, finally performing multi-band fusion, and finally achieving automatic splicing of the panoramic image. The method is mainly applied to digital image processing occasions.

Description

technical field [0001] The invention belongs to the field of digital image processing, in particular, relates to an image splicing method based on hybrid transformation. Background technique [0002] Images relate to all fields of people's life and work. With the rapid development of computer-related fields, the application value of digital image processing has been discovered by many experts and scholars, and its application fields are also growing. As a promising interdisciplinary subject, digital image processing has attracted many researchers from other scientific fields to participate in it, and has been widely used in basic research and engineering practice. Image stitching technology is an indispensable key branch in digital image processing. In recent years, with the development of computer vision and computer graphics, the combination of image stitching technology and other related technologies has opened up many new fields and has become a research hotspot. . Th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06T7/38G06K9/46
CPCG06T5/50G06T7/38G06V10/462
Inventor 孙济洲崔晨刘世光
Owner TIANJIN UNIV
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