Patent ID: 7508422

Claim:
An image sensing apparatus, comprising: an image sensor adapted to generate an electrical signal corresponding to an amount of an incident light and having a photoelectric conversion characteristic comprised of a linear characteristic area where the electrical signal is outputted after being linearly converted in relation to the amount of the incident light and a logarithmic characteristic area where the electrical signal is outputted after being logarithmically converted in relation to the amount of the incident light; an evaluation value detector adapted to detect evaluation values concerning an image sensing control from each of the linear characteristic area and the logarithmic characteristic area upon picking up an image of a subject based on pieces of subject luminance information in the respective areas, the evaluation value detector being adapted to perform a specified data conversion to standardize the pieces of subject luminance information in the respective areas into the luminance information corresponding to either one of the respective areas and detect the evaluation values based on the standardized luminance information; an image sensing controller adapted to carry out the image sensing control based on the evaluation values corresponding to the respective areas detected by the evaluation value detector; and a conversion information storage device adapted to save conversion information for the specified data conversion, wherein the evaluation value detector is adapted to convert an output level of the subject luminance corresponding to one of the respective areas into an output level corresponding to the other area based on the conversion information saved in the conversion information storage device.