Image processing device, image processing method, and storage medium storing image processing program

An image processing method of performing image processing for reducing noise in a captured image, comprising:

• measuring a first texture amount indicating luminance variation in a plurality of image regions, based on the plurality of image regions obtained by dividing the captured image and previously determining an image processing target region to be a target of the image processing based on the first texture amount;
• judging whether the image processing on a current captured image is necessary or not based on luminance of the image processing target region in the current captured image;
• calculating a second texture amount indicating luminance variation in the image processing target region for which the image processing is judged to be necessary in said judging based on the luminance, and judging whether the image processing should be performed on the image processing target region or not based on the second texture amount;
• and
• performing the image processing on the image processing target region on which said judging based on the second texture amount is that the image processing should be performed.

A non-transitory computer-readable storage medium storing an image processing program that causes a computer to perform image processing for reducing noise in a captured image, wherein the image processing program causes the computer to execute processing comprising:

• measuring a first texture amount indicating luminance variation in a plurality of image regions, based on the plurality of image regions obtained by dividing the captured image and previously determining an image processing target region to be a target of the image processing based on the first texture amount;
• judging whether the image processing on a current captured image is necessary or not based on luminance of the image processing target region in the current captured image;
• calculating a second texture amount indicating luminance variation in the image processing target region for which the image processing is judged to be necessary in said judging based on the luminance, and judging whether the image processing should be performed on the image processing target region or not based on the second texture amount;
• and
• performing the image processing on the image processing target region on which said judging based on the second texture amount is that the image processing should be performed.