Image processing device superimposing supplemental image to encompass area of original based on luminance difference between nearby pixels

An image processing device comprising:

• a focal pixel setting unit configured to set a focal pixel among a plurality of pixels in an original image that is represented by original image data;
• a near pixel setting unit configured to set a pixel near the focal pixel as a near pixel;
• a calculating unit configured to calculate a characteristic value related to luminance of the focal pixel and luminance of the near pixel;
• a target pixel determining unit configured to determine, as a target pixel, the focal pixel whose characteristic value satisfies a prescribed condition;
• and
• an editing unit configured to generate first edited image data and second edited image data based on the original image data when the target pixel determining unit determines a first target pixel and a second target pixel different from the first target pixels, the first edited image data representing a first edited image having a first supplemental image superimposed on the original image, the first supplemental image being superimposed on an area encompassing the first target pixel,
• the second edited image data representing a second edited image having a second supplemental image superimposed on the first edited image, the second supplemental image being superimposed on an area encompassing the second target pixel.

A non-transitory computer readable storage medium storing a set of program instructions installed on and executed by a computer, the program instructions comprising:

• setting a focal pixel among a plurality of pixels in an original image that is represented by original image data;
• setting a pixel near the focal pixel as a near pixel;
• calculating a degree to which a luminance value of the focal pixel differs from a luminance value of the near pixel;
• determining the focal pixel, as a target pixel when the degree is greater than a reference value;
• and
• generating edited image data by editing the original image data, the edited image data representing an edited image having a supplemental image superimposed on the original image, the supplemental image being superimposed on an area encompassing the target pixel.