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Obscured objective perspective imaging method based on optimal camera selection

An imaging method and camera technology, applied in the field of perspective imaging of occluded targets, can solve problems such as poor image clarity

Inactive Publication Date: 2013-12-11
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0004] In order to overcome the deficiencies of the poor image clarity of the existing synthetic aperture imaging method based on energy-minimized pixel marking, the present invention provides an occluded target perspective imaging method based on optimal camera selection

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  • Obscured objective perspective imaging method based on optimal camera selection
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  • Obscured objective perspective imaging method based on optimal camera selection

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Embodiment Construction

[0022] The specific steps of the occluded target perspective imaging method based on optimal camera selection in the present invention are as follows:

[0023] 1. Initialization.

[0024] Firstly, the internal and external parameters of the camera are calibrated. There are N camera angles of view in the array (N=26 in this example), and the image resolution of each angle is mxn (m=480, n=640 in this example), and the calibration method based on a two-dimensional calibration board is used for internal Parameter calibration, and then use the acquired internal parameters to calibrate the external parameters of the camera. Mark all pixels under all N camera perspectives as optional, and specify the depth d of the first target 1 is the current imaging depth (take d in this example 1 =100);

[0025] 2. Calculate the weight of each camera perspective pixel by pixel.

[0026] For the pixel point (x, y) on the specified imaging plane, use the camera parameters to find the pixel po...

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Abstract

The invention discloses an obscured objective perspective imaging method based on optimal camera selection, and the method is used for solving the technical problem that an existing synthetic aperture imaging method based on energy minimum pixel marking is poor in image definition. According to the technical scheme, a one-by-one depth imaging mode from the near to the distant is adopted, and front obscured article information of all depths is transmitted to a next imaging depth, so that multiple obscured articles are penetrated to perform perspective imaging. The current depth perspective imaging is converted into the optimal camera selection and image splicing problems, an energy minimum function is used for selecting an optimal visual camera viewing angle for each pixel point, and a perspective imaging result after splicing is obtained. Due to the fact that the camera array synthetic aperture perspective imaging is converted into the optimal camera viewing angle selection and image splicing problems, the obtained imaging result is clearer.

Description

technical field [0001] The invention relates to a method for perspective imaging of an occlusion target, in particular to a method for perspective imaging of a occlusion target based on optimal camera selection. Background technique [0002] Camera array perspective imaging is an important research topic in the field of computer vision, and has a wide range of applications in video surveillance and hidden target detection. [0003] The document "Synthetic Aperture Imaging using Pixel Labeling via Energy Minimization, PR, 46(1): 174-187, 2013" discloses a synthetic aperture imaging method based on energy minimization pixel labeling. This method transforms perspective imaging into a classification problem of foreground points / non-foreground points. First, the energy minimization method is used to mark the foreground pixels belonging to the occluder for each pixel under the camera's perspective, and then, at a given focus depth, the non-foreground The pixel points are averaged...

Claims

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Application Information

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IPC IPC(8): G06T7/00G06T5/50G06T3/40
Inventor 杨涛张艳宁仝小敏马文广
Owner NORTHWESTERN POLYTECHNICAL UNIV