Image processing apparatus and image processing program

摘要

An image processing apparatus including: an information amount calculation unit which reduces an image signal obtained by a CCD, and which performs a plurality of tone conversion processes of different characteristics on the reduced image signal to calculate an information amount of the image signal and an information amount of noise; a setting unit which formulizes the relationship of the information amount of the image signal and the information amount of the noise with respect to a tone conversion characteristic on the basis of the information amounts calculated by the information amount calculation unit, and which sets a tone conversion curve maximizing an effective information amount as a tone conversion curve used in the tone conversion processing; and a tone conversion unit which performs the tone conversion processing on the image signal on the basis of the tone conversion curve set by the setting unit.