A manual control of all images is not likely to yield the desired results, especially if the image count is higher than a few hundreds images.

The only option then is to use a software that can detect duplicate images automatically. And AntiDupl.net is that kind of software.

The software is comparable to other applications that can detect duplicate images like Duplicate File Finder, Visipics or Softchronizer.

It works by selecting files or folders that should be processed by the software program. The program uses the contents of the images that have been loaded into its interface to detect the duplicates.

The results will display pairs of duplicate images with information like the images file name, local folder and difference value. Automatic options to delete duplicate images are offered although those are limited to deleting the first or second image of a pair without options to define other parameters like deleting images based on size, file type or screen resolution.

The scan of all images is on the other hand very fast and it is possible to delete images manually in the results window.

AntiDupl.net is a free software program that can detect duplicate images. It supports the graphics formats jpg, gif, tiff, bmp and png. The program supports all major 32-bit and 64-bit Microsoft operating systems and requires the Microsoft .net Framework 2.0.

The functionality is more or less the same and can be broken down to finding duplicate images and giving the user options to react in certain ways, e.g. deleting, renaming, removing the duplicate images.

VisiPics is one of those applications that can detect duplicate images. It was developed to be capable of working with large image archives, the developers have tested it with an archive of 100.000 images that had a combined size of 15 Gigabytes. It offers dual core support, an efficient algorithm and smart automatic choices on numerous occasions.

A slider determines how strictly the program should determine similarities between images offering a scale from loose to strict. The results are displayed during the scan which means that the user can start to manage them while the scan is still going on.

The thumbnails of the detected duplicate images are displayed in the left pane. Hovering the mouse over an image displays the most relevant information including file size and resolution to the user making it easy to determine if the files are similar. It also displays a bigger picture of the image in the lower central pane. A left-click marks a file. Once all files have been marked they can either be deleted or moved by choosing the appropriate action in the Actions menu.

A user has the choice to let the program determine the image that will be deleted and the image that will be kept. That’s probably the best way of dealing with large image archives. It would simply take a very long time to check each image manually to determine if they are indeed similar and proceed with an appropriate action.

The website is offering many details on the process, how the program is comparing images in a Wiki-like interface. The most commonly used image formats are supported by VisiPics including jpg, gif, bmp and png.