Image processing apparatus, image processing method, and program

An imaging apparatus to generate a moving image with reduced noise, comprising:

• an image processor configured to:
• determine, each time an input image is input, whether a change amount of the motion of a pixel value distribution in the input image and an output image that is output, is smaller than a predetermined threshold value;
• generate a value that becomes larger as the number of times the motion change amount is sequentially determined to be smaller than the predetermined threshold value becomes larger, the value serving as a mixing ratio of the output image in mixing of the input image and the output image;
• generate a mixed noise reduced moving image by mixing, each time the input image is input, the input image and the output image based on the supplied mixing ratio and outputting the mixed noise reduced moving image;
• and
• hold the mixed noise reduced moving image.

An image processing method to generate a moving image with reduced noise, comprising:

• a determination procedure of determining, each time an input image is input, whether a change amount of a pixel value distribution in the input image and an output image that is output is smaller than a predetermined threshold value;
• a mixing ratio supply procedure of supplying, a value that becomes larger as the number of times the change amount is sequentially determined to be smaller than the predetermined threshold value becomes larger, the value serving as a mixing ratio of the output image in mixing of the input image and the output image;
• a mixing procedure of mixing, each time the input image is input, the input image and the output image based on the supplied mixing ratio to generate a mixed noise reduced moving image;
• and
• outputting the mixed noise reduced moving image.

A non-transitory computer-readable storage medium having instructions that, when executed by at least one computer, cause the at least one computer to execute instructions to generate a moving image with reduced noise comprising:

• a determination procedure of determining, each time an input image is input, whether a change amount of a pixel value distribution in the input image and an output image that is output is smaller than a predetermined threshold value;
• a mixing ratio supply procedure of supplying, a value that becomes larger as the number of times the change amount is sequentially determined to be smaller than the predetermined threshold value becomes larger, the value serving as a mixing ratio of the output image in mixing of the input image and the output image;
• and
• a mixing procedure of mixing, each time the input image is input, the input image and the output image based on the supplied mixing ratio to generate a mixed noise reduced moving image;
• and
• and output procedure of outputting the mixed noise reduced moving image.