Software & AppsOperating SystemLinux

How To Find Duplicate Photos, Including Resized Ones

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In the digital age, it’s easy to accumulate a massive amount of photos. However, managing these photos can be a daunting task, especially when it comes to finding and eliminating duplicate photos, including resized ones. This article will guide you through several tools and methods to help you find duplicate photos and maintain an organized photo library.

Quick Answer

To find duplicate photos, including resized ones, you can use various tools such as digiKam, findimagedupes, Geeqie, FSlint, fdupes, imgSeek, and Visipics. These tools allow you to search for duplicate images based on visual similarity, file size, resolution, and metadata. However, it is not possible to provide a quick answer as the process of finding and eliminating duplicate photos can vary depending on the specific tool and method used.

Understanding Duplicate Photos

Duplicate photos are exact copies of the same image. They can occur due to various reasons such as multiple downloads, backups, or sharing across different devices. Resized images, on the other hand, are the same images but with different dimensions. They can be more challenging to detect as they may not have the same file size or resolution but are visually identical.

Tools to Find Duplicate Photos

There are several tools available that can help you find both duplicate and resized images. Here are some of the most effective ones:

1. digiKam

digiKam is a professional photo management software that allows you to add all your photos to a collection and then find duplicates. To use this feature, select “Tools / Find duplicates” from the menu. It will search for duplicates across your entire collection, including resized ones.

2. findimagedupes

findimagedupes is a command-line tool that compares images passed as arguments. It can find visually similar images, including resized ones. To install it, use the command sudo apt-get install findimagedupes. To use it, navigate to the directory containing your images and run findimagedupes .. The ‘.’ represents the current directory.

3. Geeqie

Geeqie is a lightweight image viewer that offers a visual comparison of images to find duplicates. You can drag and drop image files or directories into the duplicates window. It also has options for customizing the level of similarity.

4. FSlint

FSlint is a graphical program that can find duplicate files of any type by md5sum. While it may not detect visually similar images, it can be configured to search for specific file types, such as images.

5. fdupes

fdupes is a command-line tool that can find duplicate files, but it may not handle resized images or changes in metadata. It compares files byte by byte. To use it, navigate to your directory of images and run fdupes -r .. The ‘-r’ option allows it to search subdirectories recursively.

6. imgSeek

imgSeek is a tool that can find duplicates as well as similar pictures, including resized photos and those with different filenames and metadata. It is available in desktop and server versions.

7. Visipics

Visipics is a Windows application that can be used on Linux via Wine. It offers advanced criteria for auto-selecting images based on file size, resolution, and more. However, it may have limitations with sorting duplicates.


Finding duplicate photos, including resized ones, can be a daunting task. However, with the right tools and methods, it can be made much easier. Whether you prefer a graphical interface or command-line tools, there’s a solution to help you keep your photo library organized and free of duplicates. Remember to always back up your photos before using any tool to avoid accidental data loss.

How do I know if I have duplicate photos on my computer?

You can use tools like digiKam, findimagedupes, Geeqie, FSlint, fdupes, imgSeek, or Visipics to find duplicate photos on your computer.

Can these tools also detect resized images?

Yes, some of the tools mentioned, such as digiKam, findimagedupes, Geeqie, imgSeek, and Visipics, can detect resized images as well.

Are these tools available for all operating systems?

Most of the tools mentioned, such as digiKam, findimagedupes, Geeqie, and imgSeek, are available for Linux. Visipics is a Windows application but can be used on Linux via Wine. fdupes is also available for Linux. However, it’s always best to check the specific requirements and availability of each tool for your operating system.

Can these tools search for duplicates in subdirectories?

Yes, tools like digiKam, findimagedupes, fdupes, and Visipics can search for duplicates in subdirectories. Make sure to use the appropriate command-line options or settings to enable this feature.

Do these tools compare images based on visual similarity?

Yes, tools like digiKam, Geeqie, imgSeek, and Visipics can compare images based on visual similarity. They use algorithms to analyze the content of the images and determine if they are visually similar, even if they have different dimensions or filenames.

Do I need to back up my photos before using these tools?

It’s always a good practice to back up your photos before using any tool to avoid accidental data loss. While these tools are generally safe to use, it’s better to be cautious and have a backup of your important photos.

Can these tools delete duplicate photos automatically?

Yes, some of the tools mentioned, such as digiKam, FSlint, and Visipics, have options to automatically select and delete duplicate photos. However, it’s recommended to review the selected duplicates before confirming the deletion to avoid mistakenly deleting important photos.

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