Patent ID: 7317481

Claim:
An apparatus comprising: (A) a memory that stores shading correction data, offset amounts and gain amounts respectively corresponding to image sensing sensitivities; (B) a sensitivity setting unit adapted to set image sensing sensitivity of an image sensing unit; (C) a control unit adapted to control the image sensing unit to perform image sensing operation in non-exposure state to obtain shading correction data when the set image sensing sensitivity is higher than a first sensitivity; and (D) a signal processing device adapted to, when the set image sensing sensitivity is higher than the first sensitivity, correct an image sensing signal by using the obtained shading correction data, and when the set image sensing sensitivity is lower than a second sensitivity, said second sensitivity being lower than the first sensitivity, modify the shading correction data stored in said memory using the offset amount and gain amount, stored in said memory, corresponding to the set image sensing sensitivity and correct an image sensing signal by using the modified shading correction data.