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Assessing the influence of temperature variations on the geometrical properties of a low-cost calibrated camera system by using computer vision proceduresPodbreznik, Peter ; Potočnik, BožidarThis paper estimates temperature influence on geometrical properties of both a single camera and a calibrated camera system, assuming low-cost CCD cameras. It does not cover the effect of temperature ... on the camera's electronics. Firstly, the influence of temperature change on camera parameters was modelled and integrated into an existing analytical camera model. A modified camera model enables quantitative assessment regarding the influence of temperature variations for a single camera. Temperature variations also directly influence the accuracies of calibrated cameras. The inability to analytically determine the calibration method error magnitude, led us to experimentally estimate errors regarding calibrated cameras. Finally, the total error regarding calibrated cameras was derived by combining the numerical error of the calibration method with those errors originating from temperature variations. The results show that the influence of temperature variations decreases when increasing the distances of the observed objects from the cameras. On a typical building site, the temperature influence is reflected in the image as an error of less than one pixel.Source: Machine vision and applications. - ISSN 0932-8092 (Vol. 23, no. 5, 2012, str. 953-966)Type of material - article, component partPublish date - 2012Language - englishCOBISS.SI-ID - 14940438
Author
Podbreznik, Peter |
Potočnik, Božidar
Topics
perspektivna projekcijska matrika |
analitični model kamere |
notranji parametri |
zunanji parametri |
kalibracija kamere |
temperaturne spremembe |
perspective projection matrix |
analytical camera model |
intrinsic parameters |
extrinsic parameters |
camera calibration |
temperature variations
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Podbreznik, Peter | 26194 |
Potočnik, Božidar | 15801 |
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