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A new multiple faces detection method based on facial features is proposed, which gets the face candidates with the help of skin color and makes use of wavelet express of images and the principal component analysis (PCA) to obtain the eigenvectors distinguishing faces and non-faces, and modifies Bayesian classifier to detect multiple faces of input images. ??, the parameter of the modified rules,...
ITU-R BT.1361 and IEC 61966-2-4(xvYCC) are two standards for video systems with extended-gamut YCC color space, the methods these two standards use to extend the color gamut are not the same. IEC 61966-2-4 put forward that the available quantization levels can be extended to [1, 254] in 8-bit quantization. This paper calculated the value range of luma and chroma signals corresponding to this available...
ITU-R BT.1361 defined the range of input signal for gamma correction was [-0.25, 1.33]. This paper calculated the widest color gamut and the corresponding three primary colors under this range for video system based on trichromatic principle using colorbar signal widely used in TV system, developed a kind of nonlinear quantization method to convey this gamut compatibly in current conventional color...
In this paper, a new algorithm of face detection based on differential images and PCA in color image is proposed which modified the eigenface technique. First, skin picking-up is carried out by color analysis of an image. Then, for finding the exact positions of faces, a finer matching is performed by eigenface in these detected fields and a mosaic template is used to suppress the false face. Considering...
ITU-R BT.1361 and IEC 61966-2-4(xvYCC) are two standards for video systems with extended-gamut YCC color space. IEC 61966-2-4 put forward that the available quantization levels can be extended to [1, 254] in 8-bit quantization. This paper calculated the value range of luma and chroma signals corresponding to this available quantization range with the colorbar signal which has been widely used in TV...
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