Duplicate check image resolution

A system for comparing images, comprising:

• a computer having a processor, and a computer-readable storage device;
• a program embodied on the storage device for execution by the processor, the program having a plurality of program modules, including:
• a receiving module configured to receive a first image and a second image;
• a processing module configured to process the first image and the second image, wherein the processing includes scaling the first image and the second image to a common resolution;
• a selecting module configured to select one or more pel regions of the scaled first image and of the scaled second image;
• a subtracting module configured to subtract the one or more selected pel regions of the scaled first image from the one or more selected pel regions of the scaled second image, respectively;
• and
• a determining module configured to determine whether the first image and the second image depict substantially identical subjects based on the results of the subtracting module.

A computer program product for comparing images, the computer program product comprising a computer readable storage medium having program code embodied therewith, the program code readable/executable by a processor to perform a method, comprising:

• receiving a first image and a second image, by the processor;
• processing the first image and the second image, by the processor, wherein the processing includes scaling the first image and the second image to a common resolution;
• selecting one or more pel regions of the scaled first image and of the scaled second image, by the processor;
• subtracting the one or more selected pel regions of the scaled first image from the one or more selected pel regions of the scaled second image, respectively, by the processor;
• and
• determining whether the first image and the second image depict substantially identical subjects, by the processor, based on the results of the subtraction.