Author/Editor		Lafon, Dominique; Ramananantoandro, Tahiana
Title		Color images
Type		članek
Source		Image Anal Stereol
Vol. and No.		Letnik 21, št. Suppl 1
Publication year		2002
Volume		str. S61-74
Language		eng
Abstract		The goal of this article is to present specific capabilities and limitations of the use of color digital images in a characterization process. The whole process is investigated, from the acquisition of digital color images to the analysis of the information relevant to various applications in the field of material characterization. A digital color image can be considered as a matrix of pixels with values expressed in a vector-space (commonly 3 dimensional space) whose specificity, compared to grey-scale images, is to ensure a coding and a representation of the output image (visualisation, printing) that fits the human visual reality. In a characterization process, it is interesting to regard color image attributes as a set of visual aspect measurements on a material surface. Color measurement systems (spectrocolorimeters, colorimeters and radiometers) and cameras use the same type of light detectors: most of them use Charge Coupled Devices sensors. The difference between the two types of color data acquisition systems is that color measurement systems provide a global information of the observed surface (average aspect of the surface): the color texture is not taken into account. Thus, it seems interesting to use imaging systems as measuring instruments for the quantitative characterization of the color texture.
Descriptors		COLOR COLORIMETRY MATERIALS TESTING IMAGE PROCESSING, COMPUTER-ASSISTED WOOD