Patent attributes
A method and a circuit for viewing-angle image compensation applied to a flat panel display are provided. A viewing-angle image compensation scheme is applied to an input image for improving a problem of color shift caused by a large viewing angle. The method further solves the blur effect in high frequency regions and color bleeding in low saturation regions of the input image after viewing-angle image compensation. In the method, a frequency distribution of the input image is detected and decremental frequency weights are assigned to the regions having high to low frequencies. A saturation distribution of the input image is detected and incremental saturation weights are assigned to the regions having high to low saturations. The weights assigned to the regions are used to designate degrees of the viewing-angle image compensation. The method can effectively reduce the effect of the viewing-angle image compensation on the image.
