Title :
Color calibration for multi-camera imaging systems
Author :
Gurbuz, Sabri ; Kawakita, Masahiro ; Ando, Hiroshi
Author_Institution :
Multimodal Commun. Group, NICT Universal Media Res. Center, Kyoto, Japan
Abstract :
In multi-view imaging, a number of cameras capture the same scene from different viewpoints for regeneration of the light rays which may be emitted by a special display for 3D visualization. However, there are many conditions such as spectral characteristics of the optics, lighting variations, and sensor characteristics that cause color variations among captured multi-view images; therefore, these variations cause difficulties in accurately reproducing color consistency in multi-view 3D imaging systems. As a result, color variations between the camera views may deteriorate viewer´s 3D visualization experiences. The process employed to compensate for the color variations of inter-camera images is called multi-camera color calibration. In this paper, a color calibration method with respect to a reference camera for multi-camera systems is devised by utilizing a set of robustly detected stereo correspondences between camera pairs. The method results a 3×4 coefficient matrix multiplier that can be used for color correction operations rapidly. Objective evaluation of the experimental results shows that the proposed method can minimize the color differences between the captured multi-view images to an acceptable level relative to subjective evaluation results.
Keywords :
cameras; data visualisation; image colour analysis; matrix multiplication; 3×4 coefficient matrix multiplier; 3D visualization; color correction operation; color variation; light ray generation; multicamera color calibration method; multicamera imaging system; multiview 3D imaging system; Adaptive optics; Calibration; Cameras; Image color analysis; Three dimensional displays; Transforms; color calibration; color correction; multi-view 3D imaging; multi-view color calibration; robust correspondence detection between stereo cameras; spatial color calibration;
Conference_Titel :
Universal Communication Symposium (IUCS), 2010 4th International
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-7821-7
DOI :
10.1109/IUCS.2010.5666228