Image processing apparatus, image processing method, and storage medium

An image processing apparatus comprising:

• one or more hardware processors;
• and
• a memory for storing instructions to be executed by the one or more hardware processors, wherein when the instructions stored in the memory are executed by the one or more hardware processors, the image processing apparatus functions as:
• an acquiring unit configured to acquire image data;
• a derivation unit configured to derive an occurrence rate of a class corresponding to pixel values of a target pixel in images corresponding to image data acquired by the acquiring unit;
• a selecting unit configured to select a plurality of candidate data items of which an occurrence rate derived by the derivation unit falls under a given condition;
• and
• a determining unit configured to use a candidate data item having a highest background dominance of the plurality of candidate data items to determine the pixel value of the target pixel in a background image corresponding to the image data.

An image processing method comprising:

• acquiring image data;
• deriving an occurrence rate of a value corresponding to pixel data on a first region in each of a plurality of images corresponding to the image data acquired by the acquiring;
• and
• determining a value of the first region in a background image corresponding to the image data based on a plurality of values including a value on which a highest occurrence rate is derived by the derivation unit and a value on which an occurrence rate lower than the highest occurrence rate is derived by the derivation unit.

A non-transitory computer-readable recording medium storing a readable program for operating a computer to execute an image processing method comprising:

• acquiring image data;
• deriving an occurrence rate of a value corresponding to pixel data on a first region in each of a plurality of images corresponding to the image data acquired by the acquiring;
• and
• determining a value of the first region in a background image corresponding to the image data based on a plurality of values including a value on which a highest occurrence rate is derived by the derivation unit and a value on which an occurrence rate lower than the highest occurrence rate is derived by the derivation unit.