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Nonlinear illumination adaptive image splicing method and implementing system thereof

An image mosaic and self-adaptive technology, applied in the detection field, can solve the problems of image mosaic influence, uneven illumination, etc.

Active Publication Date: 2015-10-21
XIAN TECHNOLOGICAL UNIV
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Problems solved by technology

When collecting images of bearings, the images collected at different positions from the side surface of the bearing to the light source will have uneven illumination, which will have a great impact on image stitching and subsequent defect extraction.

Method used

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  • Nonlinear illumination adaptive image splicing method and implementing system thereof
  • Nonlinear illumination adaptive image splicing method and implementing system thereof
  • Nonlinear illumination adaptive image splicing method and implementing system thereof

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Embodiment Construction

[0036] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037]An embodiment of the present invention provides a non-linear illumination adaptive image mosaic method, such as figure 1 As shown, the method is implemented through the following steps:

[0038] Step 101: Calibrate the camera.

[0039] Specifically, the camera internal parameter matrix M is determined according to the single camera calibration method, where the internal parameter matrix is ​​in the form of: where d x 、d y is the number of pixels per unit distance on the image plane; (u 0 ,v 0 ) is the coordinates of the intersection point of the camera optical axis and the image plane, that is, the coordinates of the principal point; s is the radial distortion factor; store the calibrated parameters in the computer.

[0040] Step 102: Collect images of the cylindrical bearing through the camera, and expand the collected image of ...

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Abstract

The present invention discloses a nonlinear illumination adaptive image splicing method. The method comprises: calibrating a video camera, carrying out image acquisition on a cylindrical bearing by the video camera and expanding a cylindrical bearing image obtained by acquisition into a flat image; and carrying out median filtering on the flat image obtained after expansion, and carrying out nonlinear illumination adaptive image splicing on a bearing lateral surface image obtained after filtering so as to form a complete flat image without redundancies. According to the present invention, the factor of nonuniform illumination of an acquired object is considered; in the image splicing process, an illumination nonuniform compensating factor is introduced; introduction of the factor is beneficial for improving quality of image splicing and reducing the original feature of the image; and the nonlinear illumination adaptive image splicing method is simple to operate, is easy to understand and has a high computing speed.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a non-linear illumination self-adaptive image splicing method and a realization system thereof. Background technique [0002] With the advent of the digital age, the application scope and application prospect of image mosaic are becoming more and more extensive. At present, image stitching technology is mostly used in the field of virtual reality, medical image processing, remote sensing, seabed detection, military and other fields, and few scholars or technicians apply it to parts detection. Secondly, when stitching images, it is usually not considered that the light intensity received by the points on the image at different positions from the light source is not the same, so that the collected image will be affected by uneven illumination and weaken the image. on tiny details. [0003] Chen Hailin, Xiong Zhi et al. applied image mosaic technology to large-scale ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/00G06T3/40
CPCG06T3/4038G06T7/0004G06T2207/10004G06T2207/30164
Inventor 陈智利苏俊宏杨利红李建超鲍刚
Owner XIAN TECHNOLOGICAL UNIV
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