| 摘要 |
An imaging apparatus can provide final image data with a good quality irrespective of overexposure or underexposure. The imaging apparatus includes an imaging unit capturing a subject image to produce image data, a conversion unit performing a gradation conversion on the image data, a modification unit determining the level of brightness of the image data before the gradation conversion, and modifying input/output characteristics for the gradation conversion on the image data when a brightness level of the image data is lower than a reference level of brightness. The input/output characteristics include a gamma characteristic portion and a knee characteristic portion. The modification unit modifies the input/output characteristics such that output level is increased within a range of part of input level corresponding at least to the gamma characteristic portion, in comparison with the input/output characteristics of the image data with the reference level of brightness.
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