Real-time image processing circuit capable of enhancing brightness contrast and color saturation

A real-time image processing circuit comprising:

• a first converting unit adapted to receive an input image frame including a plurality of pixels, converting the input image frame received thereby into hue data, first saturation data and first luminance data, and outputting the hue data, the saturation data and the luminance data;
• a saturation processing unit coupled to said first converting unit for receiving the first saturation data therefrom, and operable to adjust the first saturation data based on saturation mapping information to generate second saturation data corresponding to the input image frame, the second saturation data having a saturation distribution range larger than that of the first saturation data;
• a luminance processing unit coupled to said first converting unit for receiving the first luminance data therefrom, and operable to adjust the first luminance data based on luminance mapping information to generate second luminance data corresponding to the input image frame, the second saturation data having a luminance distribution range larger than that of the first luminance data;
• and
• a second converting unit coupled to said first converting unit, said saturation processing unit and said luminance processing unit for receiving respectively the hue data, the second saturation data and the second luminance data therefrom, converting the hue data, the second saturation data and the second luminance data received thereby into an output image frame corresponding to the input image frame, and outputting the output image frame.