Users who have a lot of photos and pictures may be faced with the fact that they know that there are duplicate pictures saved in their hard disk, which wastes disk space, and they don’t know how to find and eliminate them at the moment. Checking duplicates by hand? Too much work! So what’s a good way to improve efficiency? In fact, we can use the free software Find.Same.Images.OK to easily check and de-duplicate images.
Find.Same.Images.OK (download at http://www.softwareok.com/?Download=Find.Same.Images.OK) is a free green software, no need to install it after download, run the EXE file, then select the five-star red flag icon and click OK to open Simplified Chinese interface (Figure 1).
The software not only searches and compares identical images, but also those containing rotated, mirrored or negative images. Unlike checker programs that simply compare by file name or file size, it generates graphical signatures and compares them on a pixel-by-pixel basis, so even if the file size or image dimensions have changed, the comparison can still be made. The software also supports comparison of multiple folders and can compare by image quality and performance related. In addition to supporting common formats such as JPEG, GIF, PNG, BMP, PCX, WMF, TIFF, TGA, etc., it can also compare digital photos in professional formats such as RAW.
First start the software, click on the two buttons in the middle of the window to the right of the address bar, add the drive or folder to be compared (you can add more than one folder), and then click on the middle “Start” button to perform the comparison according to the software’s default settings. When the comparison is finished, the comparison results are displayed in the list at the bottom of the window (Figure 2).
Click on any entry in the comparison results list and a preview of the similar image will be displayed in the preview pane at the top of the window. If you need to edit the image, click on the Open button above the image and select the appropriate software (Figure 3).
We can follow the software’s default scheme for finding and comparing images, or we can customize the comparison scheme. The software defaults to the “Performance and Quality Balance” scheme, which compares images with 90% similarity, regardless of rotation, flip or negative, and includes subfolders when comparing files. If you want to give priority to quality or performance in the comparison, you need to select “Quality Balance” or “Performance Balance” in the Performance and Quality menu before making the comparison. If we want to compare images that are more or less similar, click on the Similarity drop-down menu and select the appropriate similarity before comparing (Figure 4). If you need to take rotated images, flipped images, and negative images into account, you need to select settings under each of these three setting menus. If you do not want to compare images in subfolders, click on the “Include subfolders” drop-down menu and select “No”.
Finally, in the Compare Results window, you can remove the duplicate images. The operation is relatively simple, just refer to the preview results, select the duplicate images, and then click the small trash can icon after the image path.