Patent ID: 8351727

Claim:
An image signal processing apparatus for processing an image signal input from an analog-to-digital converter (ADC) in a pixel-by-pixel basis and generating a bright signal corresponding to chrominance signals, the image signal processing apparatus comprising: a low pass filter (LPF) for canceling a high frequency component of the chrominance signals contained in the input image signal; a subtractor for generating a high frequency component signal by subtracting an output signal of the LPF from the input image signal; an adder for generating the bright signal by adding the high frequency component signal generated by the subtractor to the output signal of the LPF; and a bright signal controller for increasing the high frequency component signal generated by the subtractor for a pixel position if the value of the pixel position of the input image signal to the LPF is within an object range, and decreasing the high frequency component signal generated by the subtractor for the pixel position if the value of the pixel position of the input image signal to the LPF is out of the object range.