Imaging apparatus in which exposure control is performed to...

Details Imaging apparatus in which exposure control is performed to... Imaging apparatus in which exposure control is performed to...

2006-08-08

2006-08-08

Vu, Ngoc-Yen (Department: 2612)

Television

Camera, system and detail

Combined image signal generator and general image signal...

Reexamination Certificate

active

07088390

ABSTRACT:
A digital camera which can change gradation properties comprises a CCD image pickup element105for photographing a subject, an exposure control mechanism103for controlling an exposure on the image pickup element105, a digital processing circuit108including a gradation converting circuit for being capable of generating image signals having different gradation properties (gamma properties) based on the output signal from the image pickup element105, and a system controller112including a selecting circuit for selecting one of the different gradation properties, which is used in the gradation converting circuit. In the digital camera, to suppress the change of a sensitivity (output level) due to the a change of the gradation property, the exposure control mechanism103changes a control target value to control the exposure in accordance with the selected gamma value so that the output level is maintained at constant in the average exposure.

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Hideaki Yoshida, “A Suggestion for Presentation of Sensitivity (speed rating) of a Digital Camera”, ITE Technical Report, vol. 20, No. 58, published Nov. 15, 1996 (Japan), pp. 85-90.

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