A mosaic method of expressway pavement image based on roadside ptz camera

A highway and image stitching technology, applied in the field of image processing, can solve the problems of large feature matching solution errors, inconsistent matching areas, etc., and achieve the effects of high accuracy, improved accuracy, and good stitching quality.

Active Publication Date: 2021-09-03
TONGJI UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a roadside PTZ camera-based highway road surface image stitching method in order to overcome the defects of inconsistent matching areas and large feature matching solution errors in the above-mentioned prior art

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  • A mosaic method of expressway pavement image based on roadside ptz camera
  • A mosaic method of expressway pavement image based on roadside ptz camera
  • A mosaic method of expressway pavement image based on roadside ptz camera

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Embodiment Construction

[0064] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments.

[0065] Such as figure 1 Shown, a roadside PTZ camera-based highway pavement image mosaic method, including the following steps:

[0066] Step S1: According to the highway road surface images collected by the PTZ camera on the roadside of the highway under different sunlight irradiance conditions and under different camera viewing distances, the pixel non-uniformity correction of the road surface image is performed;

[0067] Step S2: According to the corrected road image, calculate the pixel accuracy of the road image under different viewing distances and different camera at...

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Abstract

The present invention relates to a roadside PTZ camera-based splicing method for expressway pavement images, comprising the following steps: Step S1: collecting road surface images of expressways under different sunlight irradiances, correcting expected gray values ​​to obtain actual gray values degree value; Step S2: Calculate the pixel accuracy of the road surface image, and calculate the length and width of the virtual projection surface; Step S3: Based on the scanning preset position of the PTZ camera, according to the transformation relationship between the virtual projection surface and the actual imaging area plane , carry out the road surface scanning of the complete road surface; step S4: according to the image sequence of the complete road surface, carry out the road surface image mosaic, realize the seamless mosaic of the full-width expressway pavement image of the corresponding road section; step S5: seamlessly mosaic the completed images of all PTZ cameras The full-size expressway pavement image is spliced ​​again to obtain the full-section image of the expressway. Compared with the prior art, the present invention has the advantages of high splicing image precision, better splicing quality, reduced influence of environmental interference, and the like.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a roadside PTZ camera-based splicing method for expressway road surface images. Background technique [0002] In recent years, with the rapid development of ITS (Intelligent Transportation Systems, Intelligent Transportation Systems), highway roadside video surveillance technology has gradually become an important means of decision-making basis for highway maintenance departments. As of the end of 2018, the total mileage of expressways in my country has reached 143,000 kilometers, and some major provinces have achieved full coverage of video surveillance. A large amount of image data of expressway roads will be generated every moment. These image data are very important for the supervision of expressways. And traffic analysis is of great significance. The existing highway roadside video surveillance hardware system is generated by arranging cameras at equidistant interva...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T3/40G06T7/38G06T7/73
CPCG06T3/4038G06T7/38G06T7/73
Inventor 邵春艳
Owner TONGJI UNIV
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