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Panorama synthetic method based on image mosaic

A synthesis method and image stitching technology, applied in the field of panorama synthesis, can solve problems such as difficult precise matching and large and coarse matching errors

Inactive Publication Date: 2014-10-01
JINLING INST OF TECH
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Problems solved by technology

Compared with the previous two algorithms, the calculation amount of this algorithm is reduced, but it is still too large in practical applications, and if the step size is too large during rough matching, it is likely to cause a large rough matching error, making it difficult to achieve an exact match

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  • Panorama synthetic method based on image mosaic
  • Panorama synthetic method based on image mosaic
  • Panorama synthetic method based on image mosaic

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Embodiment Construction

[0038] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0039] A method for synthesizing panoramas based on image mosaic disclosed by the present invention, the specific steps are as follows:

[0040] Step 1. Shoot the panorama in blocks to obtain the block-shot images of the panorama, and there is image overlap between adjacent block-shot images;

[0041] Step 2. Convert the block-shot image obtained in step 1 into a corresponding two-dimensional array matrix for each pixel, and use a homogeneous coordinate system to represent the coordinates of each pixel in the block-shot image, and the geometric transformation expression of the block-shot image as follows:

[0042] x ′ y ′ ...

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Abstract

The invention discloses a panorama synthetic method based on image mosaic. Block shooting is carried out on a panorama to obtain block shooting images of the panorama, and the image contact ratio exists between adjacent block shooting images; all block shooting images are converted into corresponding two-dimensional array matrixes according to pixels, coordinates of all the pixels in the block shooting images are expressed by means of a homogeneous coordinate system, and an algorithm based on image gray level similarity and maximum likelihood estimation is adopted to calculate a matrix M; the quadratic sum of image gray level values of minimized adjacent elements is adopted to estimate unknown variables in the matrix M; corresponding nonlinear least squares are solved by adopting an LM iterative algorithm. The algorithm based on image gray level similarity and maximum likelihood estimation is adopted in the method to calculate the matrix M and guarantees optimality of the obtained solution, and feature points easy to identify are not needed to be provided. The calculated amount is relatively less, the matching error is less, and exact match can be achieved.

Description

technical field [0001] The invention discloses a panorama composition method based on image splicing, and relates to the technical field of image processing. Background technique [0002] Panorama is an important scene representation method. In practical applications, there are mainly two ways to obtain it, direct method and image stitching method. The direct method can be obtained directly by using a special panoramic camera and other equipment, but the equipment used for shooting is usually expensive, and the camera needs to be calibrated precisely when taking pictures, which is not practical. And a more flexible approach. The method of image stitching to obtain a panorama does not have too high requirements for the equipment for taking pictures, and an ordinary camera can be used. [0003] Photo graphic mosaic, or montage collage, is an image processing technology that is widely used in the construction of virtual environments and the production of special effects in mo...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T3/40
Inventor 周洪成胡艳陈存宝姜志鹏刘海陵
Owner JINLING INST OF TECH
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