A fully automatic and fast calibration method for photography/camera based on infrared LED lights
A technology of LED lights and calibration methods, which is applied in the testing of machines/structural components, instruments, measuring devices, etc., can solve problems such as difficult to realize automatic photography/camera rapid calibration, and reduce the cost of manual measurement of image coordinates Steps to realize the effect of factory flow operation
Inactive Publication Date: 2020-11-17
WUHAN UNIV
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[0006] The technical problem to be solved by the present invention is to provide a fully automatic rapid calibration method for photography / camera based on infrared LED lamps in view of the defect that it is difficult to realize automatic rapid calibration of photography / camera in the prior art
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[0044] 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.
[0045] Such as image 3 As shown, the automatic fast calibration method of photography / camera based on infrared LED lamps in the embodiment of the present invention comprises the following steps:
[0046] S1. Establish an infrared LED lamp calibration field: select the venue and set up benchmarks according to the establishment method of the indoor high-precision three-dimensional control field, select infrared LED lights as control mark points, install infrared LED lights on each benchmark, and measure each infrared The object space coordinates of the LED lamp;
[0047] S2. Collect images of the ...
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The invention discloses an infrared LED lamp based camera automatic rapid calibration method. The method comprises the following steps: step one, establishing an infrared LED lamp calibration field; step two, collecting an image of the calibration field; step three, automatically reading the image of the calibration field; step four, automatically extracting infrared LED lamp mark points in the image of the calibration field; step five, automatically numbering the infrared LED lamp mark points in the image; and step six, automatically calculating the calibration parameters of a camera. The provided method does not need artificial intervention; a camera can be rapidly and automatically calibrated within several minutes; the method is simple and easy to perform; the step of manually measuring the image coordinates in a conventional calibration method is eliminated; an operator does not need to know professional knowledge of photogrammetry and computer vision; line production in a plant can be realized, and the method has a high practical value and wide application prospect for calibration of massive cameras.
Description
technical field [0001] The invention relates to the technical field of photogrammetry and computer vision geometric positioning, in particular to a fully automatic and rapid calibration method for photography / cameras based on infrared LED lamps. Background technique [0002] Both photogrammetry and computer vision obtain the geometric and texture information of the object by processing the images acquired by the photographic (image) camera. Before carrying out related work, it is the first step to calibrate the photographic (image) camera. The calibration results mainly provide the inspection and correction of the internal orientation elements, optical distortion parameters and other important parameters of the photographic (image) camera. Many scholars in the field of photogrammetry and computer vision at home and abroad have proposed a variety of effective calibration methods, such as self-calibration methods, building vanishing point calibration methods, calibration metho...
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IPC IPC(8): G01C25/00G01M11/02
CPCG01C25/00G01M11/00
Inventor 付建红曹金山种衍文
Owner WUHAN UNIV