Image processing device, imaging device, image processing method, and program

An image processing device comprising:

• a processed data acquisition unit that acquires processed image data, which is acquired by multiplying each pixel value of original image data by a white balance ratio indicating a ratio of a white balance gain to a white balance base value that is determined on the basis of a white balance setting mode when the original image data is acquired, from a storage medium;
• a setting mode acquisition unit that acquires information about the white balance setting mode when the original image data is acquired;
• a base value acquisition unit that estimates the white balance base value on the basis of the information about the white balance setting mode when the original image data is acquired;
• and
• a white balance processing unit that multiplies each pixel value of the processed image data by the white balance base value estimated by the base value acquisition unit to acquire white-balance-adjusted image data.

An image processing device comprising:

• a processed data acquisition unit that acquires processed image data, which is acquired by multiplying each pixel value of original image data by a white balance ratio indicating a ratio of a white balance gain to a white balance base value that is determined on the basis of a white balance setting mode when the original image data is acquired, from a storage medium;
• a setting mode acquisition unit that acquires information about the white balance setting mode when the original image data is acquired;
• a processing mode acquisition unit that acquires information about a white balance processing mode applied to the processed image data;
• a base value acquisition unit that acquires the white balance base value on the basis of the white balance setting mode in a case in which the white balance processing mode is determined to be the same as the white balance setting mode on the basis of the information about the white balance setting mode and the information about the white balance processing mode and acquires the white balance base value on the basis of the white balance processing mode in a case in which the white balance processing mode is determined to be different from the white balance setting mode;
• and
• a white balance processing unit that multiplies each pixel of the processed image data by the white balance base value acquired by the base value acquisition unit to acquire white-balance-adjusted image data.

An image processing method comprising:

• acquiring a white balance gain for each pixel of original image data;
• determining a white balance base value and acquiring a white balance ratio indicating a ratio of the white balance gain to the white balance base value for each pixel of the original image data;
• and
• multiplying each pixel value of the original image data by the white balance ratio to acquire processed image data.

An image processing method comprising:

• acquiring processed image data, which is acquired by multiplying each pixel value of original image data by a white balance ratio indicating a ratio of a white balance gain to a white balance base value that is determined on the basis of a white balance setting mode when the original image data is acquired, from a storage medium;
• acquiring information about the white balance setting mode when the original image data is acquired;
• estimating the white balance base value on the basis of the information about the white balance setting mode when the original image data is acquired;
• and
• multiplying each pixel value of the processed image data by the estimated white balance base value to acquire white-balance-adjusted image data.

An image processing method comprising:

• acquiring processed image data, which is acquired by multiplying each pixel value of original image data by a white balance ratio indicating a ratio of a white balance gain to a white balance base value that is determined on the basis of a white balance setting mode when the original image data is acquired, from a storage medium;
• acquiring information about the white balance setting mode when the original image data is acquired;
• acquiring information about a white balance processing mode applied to the processed image data;
• acquiring the white balance base value on the basis of the white balance setting mode in a case in which the white balance processing mode is determined to be the same as the white balance setting mode on the basis of the information about the white balance setting mode and the information about the white balance processing mode, and acquiring the white balance base value on the basis of the white balance processing mode in a case in which the white balance processing mode is determined to be different from the white balance setting mode;
• and
• multiplying each pixel of the processed image data by the acquired white balance base value to acquire white-balance-adjusted image data.