Unik: Duplicate Image Finder
By Meanterm Inc.
Open the Mac App Store to buy and download apps.
A True Duplicate / Similar Image Finder.
Just drag and drop any image folders from Finder or events from iPhoto on your local drive onto Unik. Then Unik will start comparing. You can simply add more images whenever you want and detect duplicates. It's that easy.
Unik compares not the binary data but the image contents, so that you can find truly similar images regardless of file types, resolutions, directions and color saturations.
◦ Caching for fast access later
◦ Adjustable similarity threshold
◦ Safe tagging to images from iPhoto
◦ Fast and stable comparison algorithm
◦ Mode for comparing meta data of the files
◦ Search, sort, select and remove images in result
◦ Options for excluding images with low contrast from result
◦ Options for comparing images even flipped, rotated and gray-scaled.
[Info] Comparing images over network or on USB medias needs much time. It is strongly recommended to use images on local hard drive.
What's New in Version 3.1
◦ Bug fixes
◦ Result sorting
◦ Options for auto reset
◦ Search and select in result
The app does an amazing job of identifying duplicates. Just throw a folder (or set of folders, including nested folders) with thousands of images in it and in less than a minute it will have identified duplicates. BUT the interface to then choose which ones to keep is very poor. The ones the app recommends keeping are marked with a yellow star, but there is no way to move that star to another image. You can click on the blank star under other images, but it then turns green. You can also shift-click on them and a box appears around them. These two actions may or may not have the same effect (the instructions are minimal and very unclear) and in any case seem to mark the image for deletion, not retention. The app could easily win a 5-star rating if it had a consistent, easily-understood way of showing exactly which images would be retained. Also, the app needs to show the folder path to each image, as that can be a criterion for selection of which image to keep, particularly in the case of exact duplicates.
This program is incredible. After 10 years of collecting photographs it found all kinds of duplicates that even photoshop couldn't detect. Literally saved me hundreds of hours and 10s of gigs of data.
Simple and as advertised
Had over 10,000 pictures taken in the last 7 years. Lots of dupes. Gone in 60 seconds.