Surface color measurements by active vision systems
In colorimetry, accurate measurements of surface colors are obtained by fixing the measuring geometry, as reflectance strongly depends on the viewing angle and the illumination geometry. To this aim, CIE recommends four standard geometries, defining both irradiation and observation conditions, as reliable colorimetric measurements can be achieved only if the measuring geometry is fixed or known. Unfortunately, when dealing with 3D objects, with large dimensions in space, geometry can hardly be controlled and new-concept instrumentation is needed to obtain results reproducible in different times and/or locations.In this paper, a new approach to surface colour measurements is proposed based on stereo active vision systems, carrying on integrated colorimetric and geometric measurements with assessed accuracy.Basically, an active vision system measures the 3D position of a point in the scene of the imaged surface and the tristimulus values of this point. The whole surface is reconstructed with high resolution by scene tessellation and image mosaicing, and the surface is obtained from sparse points or by dense reconstruction from the stereo images. All these functions are automatically performed under computer control
3D measurement Active vision Colour measurement Image Processing Measurements
Rastello M.L.
INRIM
国际会议
26th Session of the CIE(国际照明委员会（CIE）第26届大会)
北京
英文
258-261
2007-07-04（万方平台首次上网日期，不代表论文的发表时间）