Some of these features are only available on the Pro edition but both editions can be accessed for a trial period. Compare and synchronize photo folders or libraries.The PDFelement for Mac comes in both basic and Pro with additional features such as added page labeling, Optical Character Recognition ( OCR), File Size Optimization, Volume Discounts for Businesses, Adjustable Page Boxes, Access to hundreds of PDFs templates and scanners to PDF.Search for similar images based on a sample or multiple sample photos.
Identify duplicate images regardless of the image format. Key Features for Finding Repeating Photos: That is why a photo duplicate finder is a much more sophisticated and advanced tool. On the contrary a dedicated duplicate image finder tool has to include code for decoding every image format. They do that because it is simpler and does not require additional effort. This is the reason why a standard duplicate file finder can not identify duplicate images even if they are absolutely identical and stored in different file formats - because they compare the file data instead of decoding that data and comparing the actual photo that it represents. That is why the same image stored in different file formats has totally different data representation on the storage. The different file formats have different way of compression and different way of storing those pixels. As the quantity of those pixels is large they are usually compressed when stored in a file and decompressed when they have to be displayed. The count of the horizontal and vertical pixels determines the resolution of the picture. 
In order to understand how it work you should know how a digital photo is stored.Ī digital photo is represented by dots with different colors named pixels. Photo duplicate cleaner is a dedicated tool for finding duplicate images.
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