Planar Test Objects for Photogrammetric Calibration of Enhanced Vision Systems Cameras: Application Practice
Two variants of constructs of planar test objects, which can be used to evaluate the internal and external parameters of video cameras operating as part of an enhanced vision system consisting of several video cameras in the visible and infrared wavelength ranges, are considered: with stationary electric heater and with portable electric heater like dock station. The design of both planar test objects consists of the light planar aluminum plate, squares from dark vinyl film, electric heating element and thermostat. The design of the device for performing automated camera calibration is presented. It is shown that the evaluation of the homography matrix based on the results of the performed preliminary calibration makes it possible to superimpose visible and long wave infrared images with an absolute error of the order of units of pixels.
Camera calibration, enhanced vision systems, test object, camera intrinsic and extrinsic parameters, multispectral image superimposition, image fusion