Patent ID: 9013597
Filing Date: 2015-04-21
Classification: G06T,H04N

Abstract:
1. An image pickup apparatus having an image pickup device that obtains an image signal, comprising: an exposure control unit configured to make the image pickup device output first and second image signals corresponding to the first and second exposures differing from each other; a compensation processing unit configured to perform a noise compensation process on the first and second image signals; and a synthesizing unit configured to synthesize the first and second image signals after the noise compensation process to obtain a composite image signal, wherein said compensation processing unit inherits first data obtained in the first image signal when the noise compensation process was carried out on the first image signal, and carries out a noise compensation process on next first image signal based on the first data, and wherein said compensation processing unit inherits second data obtained in the second image signal when the noise compensation process was carried out on the second image signal, and carries out a noise compensation process on next second image signal based on the second data, wherein each of the first and second image signals has a plurality of successive frames, wherein the image pickup apparatus further comprises a determination unit configured to, when gains of the first and second image signals differ, determine that the first data obtained in the previous frame of the first image signal is to be used for the noise compensation process for the next frame of the first image signal and the second data obtained in the previous frame of the second image signal is to be used for the noise compensation process for the next frame of the second image signal, and wherein when gains of the first and second image signals are the same, said determination unit determines that data obtained by the noise compensation process on the previous frame of the first signal is to be used for the noise compensation process on the next frame of the second image signal, and data obtained by the noise compensation process on the previous frame of the second signal is to be used for the noise compensation process on the next frame of the first image signal.