Patent ID: 8379045

Claim:
An image processing circuit, suitable for transferring an image data from a wide gamut to a preset gamut, comprising: an input unit, receiving the image data, and obtaining a plurality of color signal values for forming the image data; a first multiplier, multiplying the color signals by a transfer matrix, and obtaining a plurality of transfer color signal values, so as to form a display image; and a matrix generating unit generating the transfer matrix, wherein the matrix generating unit comprises: a comparator, receiving the color signal values, and outputting a maximum value of the color signal values; an adder, calculating a sum of the color signal values; a divider, coupled to the comparator and the adder, for dividing the maximum value of the color signal values by the sum of the color signal values, and obtaining a condition value; an operational unit, calculating a weighted value according to a numerical interval where the condition value falls in; and a second multiplier, receiving an operation matrix for multiplying at least a part of element values in the operation matrix by the weighted value to obtain the transfer matrix.