Patent ID: 8339485

Claim:
A video signal processing apparatus, comprising: a user interface unit that receives a designation of values of at least three points that form a gamma curve used during gamma correction of a video signal; a gamma correction value calculating unit that calculates gamma correction values by substituting coefficients, which are obtained by an approximation calculation carried out on the values of the at least three points, into a selected one of an exponential function and a logarithmic function, each of which uses the coefficients as parameters and each of which is displayed as an option, via the user interface unit, from which the selected one is selected; and a gamma correction value storage unit that stores the gamma correction values calculated by the gamma correction value calculating unit and is operable when an indication, that specifies the gamma correction values have been confirmed by a user, is received, to output the gamma correction values to a gamma correction unit that carries out processing for gamma correction, wherein the gamma curve is determined based on a first curve determined by substituting the coefficients into one of the exponential function and the logarithmic function and a straight line that has the first point as an origin and a gradient determined by a value of an initial gain, which determines the gradient of a rising part of the gamma curve and is inputted via the user interface unit.