Patent ID: 7042503

Claim:
An image sensing apparatus comprising: a signal generator adapted to generate a signal upon reception of input light; a transfer unit adapted to transfer the signal generated by said signal generator; a temperature measuring unit adapted to measure a temperature; a signal measuring unit adapted to measure a signal amount; an amplification unit adapted to amplify the signal transferred from said transfer unit; and a control unit adapted to control to decrease a gain when a temperature measured by said temperature measuring unit is higher than a predetermined temperature, increase the gain when the temperature measured by said temperature measuring unit is lower than the predetermined temperature and the signal amount measured by said signal measuring unit is lower than a predetermined signal amount, and decrease the gain when the temperature measured by said temperature measuring unit is lower than the predetermined temperature and the signal amount measured by said signal measuring unit is higher than the predetermined signal amount, wherein said predetermined temperature is set such that dark current of said amplification unit does not exceed a predetermined value.