
Modifying all duplicate images
When working with the delete, alias or label all duplicate images the following procedure is used to determine the 'original' image which will not be deleted, aliased or labeled. This procedure is used by checking each image against each other, working out which one is more likely to be the original image.
The first thing that is checked is if the image is an alias, if the image is an alias then it cannot be considered the original image.
Then the images matching comparison is tested. If the images are exactly the same at a pixel level then the smaller file size is chosen. If the images are not the same at a pixel level then the image with a larger file size is used as the original image.