Image processing apparatus, image processing method, program and electronic apparatus

An image processing method comprising:

• performing a comparison using at least one of a maximum value and an average value of luminance signals of an input image, with a saturation level as a reference of comparison, the saturation level being a level of light accumulation performed for a predetermined time length, the predetermined time length being one out of a plurality of time lengths for accumulating light in imaging of the input image;
• generating a tone curve to be used for performing compression processing to a luminance gradation of the input image, on the basis of a result of the comparison being made;
• and
• performing compression processing to the luminance gradation of the input image, according to the tone curve being generated.

An electronic apparatus, comprising

• an image processing apparatus, having
• a comparing unit configured to perform a comparison using at least one of a maximum value and an average value of luminance signals of an input image, with a saturation level as a reference of comparison, the saturation level being a level of light accumulation performed for a predetermined time length, the predetermined time length being one out of a plurality of time lengths for accumulating light in imaging of the input image,
• a tone curve generator configured to generate a tone curve to be used for performing compression processing to a luminance gradation of the input image, on the basis of a result of the comparison made by the comparing unit, and
• a luminance gradation compression processor configured to perform compression processing to the luminance gradation of the input image, according to the tone curve being generated by the tone curve generator.