Patent ID: 6906827
Filing Date: 2005-06-14
Classification: H04N

Abstract:
1. A color image processor for converting an input image data containing color-separated red, green and blue color input signals into an output image data containing cyan, magenta, yellow and black color output signals, which are used in a color output device, comprising: an object identifying circuit for determining whether a data format of the input image data is a non-picture format or a picture format; first processing means, responsive to said object circuit, for performing a color conversion of the input image data of the non-picture image format and, when values of the respective color-separated input signals are minimum, making values of the respective cyan, magenta and yellow color output signals minimum and a value of the black color output signal maximum; and second processing means, responsive to said object identifying circuit, for performing a color conversion of the input image data of the picture image format, setting the cyan, magenta and yellow color output signals to temporary values slightly smaller than maximum values, when the values of the respective color-separated input color signals are minimum, and obtaining final cyan, magenta, yellow and black color output signals by processing the temporary values by a Black-Generation land Under-Color-Removal (UCR) processing corresponding to said color output device.