| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method enabling the determination of an illuminant of a digital color image. <P>SOLUTION: This method is relevant to the technical field of analyzing and processing digitized color images. Particularly, it relates to a method of determining the chromaticity of an illuminant (white reference) of a color image representing a natural scene of objects or entities. This method uses the principle of the constancy of dichromatic color, and it also uses spatial color segmentation of the image and relevant filtering to select the regions of the image to be analyzed, that is to extract the analyzed regions non-compliant with the chromatic model. The method is applicable for improving the performance of the means of analysis and recognition of the shapes of objects in an image. <P>COPYRIGHT: (C)2003,JPO |
