Image processing device, image processing method, and non-transitory computer-readable recording medium having stored therein image processing program

An image processing method comprising:

• acquiring a probability distribution of luminance of a pixel in a plurality of perspective images including the luminance of the pixel which is superposition of luminance components resulting from respective objects, based on an occurrence frequency of a perspective image in which the luminance of the pixel has respective values of a plurality of values;
• estimating a mixture distribution indicating the acquired probability distribution;
• estimating a component corresponding to a smallest expectation value distribution of which an expectation value is the smallest among a plurality of partial distributions that form the estimated mixture distribution, and forming at least a portion of the luminance of the pixel;
• removing the estimated component from the luminance of the pixel included in the perspective image.

A non-transitory computer-readable recording medium having stored therein an image processing program for causing a computer to execute a process comprising:

• acquiring a probability distribution of luminance of a pixel in a plurality of perspective images including the luminance of the pixel which is superposition of luminance components resulting from respective objects, based on an occurrence frequency of a perspective image in which the luminance of the pixel has respective values of a plurality of values;
• estimating a mixture distribution indicating the acquired probability distribution;
• estimating a component corresponding to a smallest expectation value distribution of which an expectation value is the smallest among a plurality of partial distributions that form the estimated mixture distribution, and forming at least a portion of the luminance of the pixel;
• removing the estimated component from the luminance of the pixel included in the perspective image.