Image processing apparatus, image processing method, and storage medium

An image processing method comprising:

• a first determination step of determining whether or not a first area consisting of a plurality of pixels including a pixel of interest is an area in a uniform color for the pixel of interest in input image data;
• a second determination step of determining whether or not a second area, different from the first area, consisting of a plurality of pixels including the pixel of interest is an area in a uniform color;
• a setting step of setting a reference area consisting of the pixel of interest and adjacent pixels of the pixel of interest for the pixel of interest;
• and
• a correction step of correcting the pixel value of the pixel of interest to a value for which noise has been reduced based on the pixel value of the pixel included in the reference area, wherein
• in the setting step, a predetermined area prepared in advance and consisting of a plurality of pixels is set as the reference area in a case where the first area is determined to be an area in a uniform color in the first determination step, and an area consisting of a plurality of pixels in accordance with determination results in the second determination step is set as the reference area in a case where the first area is determined not to be an area in a uniform color in the first determination step.

A non-transitory computer readable storage medium storing a program for causing a computer to perform an image processing method comprising:

• a first determination step of determining whether or not a first area consisting of a plurality of pixels including a pixel of interest is an area in a uniform color for the pixel of interest in input image data;
• a second determination step of determining whether or not a second area, different from the first area, consisting of a plurality of pixels including the pixel of interest is an area in a uniform color;
• a setting step of setting a reference area consisting of the pixel of interest and adjacent pixels of the pixel of interest for the pixel of interest;
• and
• a correction step of correcting the pixel value of the pixel of interest to a value for which noise has been reduced based on the pixel value of the pixel included in the reference area, wherein
• in the setting step, a predetermined area prepared in advance and consisting of a plurality of pixels is set as the reference area in a case where the first area is determined to be an area in a uniform color in the first determination step, and an area consisting of a plurality of pixels in accordance with determination results in the second determination step is set as the reference area in a case where the first area is determined not to be an area in a uniform color in the first determination step.