Abstract: An exemplary aspect of the invention is an image pickup apparatus including a sensor unit including a plurality of pixels; an exposure control unit that controls exposure by a feedback control based on image data acquired by the sensor unit; and a display unit that displays an image having undergone exposure control. During a time period from a point immediately after activation of the image pickup apparatus until a point when an image is displayed on the display unit, the sensor unit executes temporary loading of a part of the image data, and the exposure control unit sets an optimum exposure value based on the image data temporarily loaded.

Abstract: A high-frequency integrator acquires a first integrated value by integrating a high-frequency component of first image data. A corrector handles second image data, which is obtained when an image processor subjects the first image data to an image process affecting frequency characteristics, and acquires a second integrated value by correcting the first integrated value acquired by the high-frequency integrator in accordance with a change in the frequency characteristics that is brought about by the image process. An encoder calculates, in accordance with the second integrated value acquired by the corrector, a quantization scale for compressing the second image data acquired by the image processor to a predefined number of bytes at once, and compresses the second image data accordingly.

Abstract: A high-frequency integrator acquires a first integrated value by integrating a high-frequency component of first image data. A corrector handles second image data, which is obtained when an image processor subjects the first image data to an image process affecting frequency characteristics, and acquires a second integrated value by correcting the first integrated value acquired by the high-frequency integrator in accordance with a change in the frequency characteristics that is brought about by the image process. An encoder calculates, in accordance with the second integrated value acquired by the corrector, a quantization scale for compressing the second image data acquired by the image processor to a predefined number of bytes at once, and compresses the second image data accordingly.

Abstract: An exemplary aspect of the invention is an image pickup apparatus including a sensor unit including a plurality of pixels; an exposure control unit that controls exposure by a feedback control based on image data acquired by the sensor unit; and a display unit that displays an image having undergone exposure control. During a time period from a point immediately after activation of the image pickup apparatus until a point when an image is displayed on the display unit, the sensor unit executes temporary loading of a part of the image data, and the exposure control unit sets an optimum exposure value based on the image data temporarily loaded.