Patent ID: 8718395

Claim:
An image processing apparatus comprising: a first high-pass filter that extracts a mid-high range component having frequencies greater than or equal to a first frequency value from an input image signal; a first non-linear processing unit that performs non-linear processing on an output signal from the first high-pass filter; a first addition unit that adds an output signal from the first non-linear processing unit and the input image signal; a threshold value determination unit that detects a maximum value and a minimum value of pixel values of the input image signal in a range thereof that was subjected to processing by the first high-pass filter, and determines an upper threshold value and a lower threshold value for clipping processing based on the maximum value and the minimum value; a clipping unit that performs clipping processing on an output signal from the first addition unit using the upper threshold value and the lower threshold value; a second high-pass filter that extracts a high range component having frequencies greater than or equal to a second frequency value that is greater than the first frequency value from an output signal from the clipping unit; a second non-linear processing unit that performs non-linear processing on an output signal from the second high-pass filter; and a second addition unit that adds an output signal from the second non-linear processing unit and the output signal from the clipping unit.