Image processing apparatus and image processing method

An image processing apparatus comprising:

• a setting unit configured to set a first region that includes a target pixel on which pixel correction is to be performed, and that extends in a first direction, and further configured to set a plurality of regions obtained by shifting the first region by a predetermined amount in directions perpendicular to the first direction;
• a detection unit configured to detect correlation values in each of a plurality of positions in the first region and the plurality of regions by scanning the first region and the plurality of regions using a region of a plurality of pixels including the target pixel as a template;
• a selection unit configured to select pixel values in the first region and the plurality of regions based on the correlation values;
• a first obtaining unit configured to obtain a first correction value using a plurality of the selected pixel values;
• a second obtaining unit configured to obtain a weight for the first correction value based on a magnitude of a first correlation value, which is obtained using the correlation values for pixel values that are used for obtaining the first correction value, and a magnitude of the correlation value for the pixel value selected in the first region;
• a third obtaining unit configured to obtain a second correction value based on the first correction value and the pixel value selected in the first region, using the weight;
• and
• a correction unit configured to correct the value of the target pixel using the second correction value.