Array camera observation method for detecting structure surface in turbid media

Abstract

The invention discloses an array camera observation method for detecting a structure surface in turbid media, and the method employs a camera array device, can greatly reduce the observation distance under the condition that the size of a view field is not changed and improves the imaging resolution, so as to achieve a purpose of carrying out the clear imaging of the structure surface in the turbid media. The method comprises the following steps: calibrating all cameras through employing a coding point calibration plate, and obtaining the internal parameter matrix and distortion parameter matrix of each camera and a rotating matrix and translation matrix of a camera coordinate system and the world coordinate system; calculating an ideal internal parameter matrix of a camera array; calculating an image homography transformation matrix; carrying out the correction calculation of optical centers of the camera; carrying out the correction calculation of lens distortion; carrying out the calculation of the mapping relation between a single camera image and an array image, i.e., a look-up table; and carrying out the high-resolution imaging display and detection of the structure surface.

Description

technical field [0001] The invention relates to an array camera observation method for structural surface detection in turbid media, in particular to a high-definition structural surface observation method for turbid media realized by digital image processing technology and camera calibration technology. Background technique [0002] The structure will be affected by various conditions during the service process, which will cause different degrees of damage to the structure and affect its normal use. Therefore, the safety detection of the structure is of great significance, and the surface detection is one of the important aspects. Surface inspection refers to the measurement of the geometric dimensions of the overall structure and local structures, the detection and measurement of structural defects, etc. [0003] Under normal conditions, a single camera is generally used to detect the surface of the structure, but under some complex conditions such as turbid media, if the...

AI Technical Summary

Problems solved by technology

[0003] Under normal conditions, a single camera is generally used to detect the surface of the structure, but under some complex conditions such as turbid media, if the observation distance is long, it is difficult to obtain a clear appearance image due to the influence of the light transmission medium; but the observation distance is short , the field of view becomes smaller

At present, most camera arrays use long-distance imaging, and the image clarity is difficult to guarantee. So far, there is no array camera method that can be used for structural surface detection in turbid media.

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