Panoramic image tone consistency correction method and system

A panoramic image, consistent technology, applied in image analysis, graphic image conversion, image data processing and other directions, can solve problems such as color inconsistency

CN107016647BActive Publication Date: 2019-11-22WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-11-22

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Abstract

The invention proposes a panoramic image tone consistency correction method and system. The method includes the following steps: extracting a content-consistent area from overlapped areas of all adjacent image pairs, and extracting a color corresponding relation between images according to a cumulative probability histogram of the content-consistent area at an equal probability interval; defining a tone transformation model with relatively high flexibility, and optimizing global tone consistency, image contrast and gradient details while designing a global energy function; and through solving model parameters with strict global optimality, applying respective tone correction models to all images to perform tone consistency correction, and outputting a processing result. The panoramic image tone consistency correction method and system utilize the tone corresponding relation of overlapped areas between adjacent images, and can effectively eliminate relatively large tone difference existing among images; the problems of tone overflow, dynamic range narrowing and gradient loss relative to an original image can be suppressed while tone consistency is corrected, a correction model of global joint optimization does not need to define a specific reference image, and the problem of an accumulative error can be effectively reduced.
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Description

technical field

[0001] The invention belongs to the technical field of image splicing, and in particular relates to a method and system for correcting tone consistency between panoramic and multi-view images. Background technique

[0002] Image stitching is a technology that uses multiple images with certain overlapping parts to synthesize high-resolution wide-angle panoramic images. It is currently widely used in panoramic imaging, image rendering, virtual roaming and other fields. In the image stitching process, tone consistency correction is the first step in the tone processing stage (tone correction, stitching line selection, and boundary fusion). The processing effect and efficiency of the two steps. At present, the algorithms for dealing with the difference in hue in image stitching are mainly several classic methods proposed more than ten years ago. On the one hand, the ability to correct the hue is limited, and on the other hand, the corrected image is prone to oth...

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Embodiment Construction

[0068] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0069] The method and system for correcting the color consistency of the panoramic image proposed by the present invention includes detecting the content consistent area in the overlapping area between adjacent images, and extracting the color correspondence between the images according to the CDF and other percentile points of the content consistent area; the definition is flexible A high-degree tone transformation model, designing a global energy function while optimizing global tone consistency, image contrast, and gradient details; efficient solution of model parameters with strict global optima...