# Image Difference

Calculate the difference between two images to identify changes or create comparison masks

> Canonical page: https://elysiatools.com/en/tools/image-difference

- **Category:** Design

- **Keywords:** image, difference, compare, mask, subtract, detect, changes, analysis

## Overview

The Image Difference tool allows you to precisely compare two images to detect subtle changes, identify visual discrepancies, or generate comparison masks by calculating the pixel-level differences between files.

## Inputs

- **First Image** (file): First image for comparison
- **Second Image** (file): Second image for comparison
- **Difference Mode** (select): How to calculate the difference between images
- **Output Format** (select): Output format for the result image (PNG recommended for accuracy)
- **Quality (1-100)** (number): Output quality for lossy formats

## When to use

- Detecting visual changes between two versions of a design or UI mockup.
- Verifying that image processing or compression has not introduced unwanted artifacts.
- Creating masks to isolate specific differences between two nearly identical images.

## How it works

- Upload your original image as the first file and the modified version as the second file.
- Select a difference mode such as 'Absolute Difference' or 'Highlight Changes' to define how the output is generated.
- Choose your preferred output format and quality settings, then process the images to view the resulting comparison file.

## Use cases

- Quality assurance for graphic designers verifying exported assets.
- Software testing for UI regression to ensure interface consistency.
- Forensic analysis to identify hidden edits in digital images.

## Frequently asked questions

### What file formats are supported?

The tool supports JPEG, PNG, WebP, GIF, BMP, and TIFF formats.

### What is the difference between Absolute and Highlight modes?

Absolute Difference shows the mathematical variance between pixels, while Highlight mode emphasizes specific changes for easier visual inspection.

### Is there a file size limit?

Yes, each uploaded image must be under 10MB.

### Which output format should I choose?

PNG is recommended for the highest accuracy, as it is a lossless format that preserves the integrity of the comparison result.

### Can I compare images of different dimensions?

For the most accurate results, it is recommended to use images of the same dimensions to ensure pixel-to-pixel alignment.

## Related tools

- [Image Boolean AND](https://elysiatools.com/en/tools/image-boolean-and): Apply bitwise AND operation between two images to create intersection mask
- [Image Boolean OR](https://elysiatools.com/en/tools/image-boolean-or): Apply bitwise OR operation between two images to create union mask
- [Image Boolean XOR](https://elysiatools.com/en/tools/image-boolean-xor): Apply bitwise XOR operation between two images to create difference mask
- [Image Emboss Kernel](https://elysiatools.com/en/tools/image-emboss-kernel): Apply emboss convolution kernel to create 3D raised surface effects on images
- [Image Multiply Blend](https://elysiatools.com/en/tools/image-multiply): Apply multiply blend mode between two images to create shadow effects and darken colors
- [Image Overlay Blend](https://elysiatools.com/en/tools/image-overlay): Apply overlay blend mode between two images to enhance contrast and create dramatic effects
- [Image Saturation Adjustment](https://elysiatools.com/en/tools/image-saturation): Adjust color saturation levels to make colors more vivid or create grayscale effects
- [Image Screen Blend](https://elysiatools.com/en/tools/image-screen): Apply screen blend mode between two images to create brighter, more luminous effects

## Samples

- [Web Image Processing Python Samples](https://elysiatools.com/en/samples/web-image-processing-python): Web Python image processing examples using PIL/Pillow including reading, saving, resizing, and format conversion
- [Web Image Processing TypeScript Samples](https://elysiatools.com/en/samples/web-image-processing-typescript): Web TypeScript image processing examples including image read/save, scaling, and format conversion
- [Android Image Processing Java Samples](https://elysiatools.com/en/samples/android-image-processing-java): Android Java image processing examples including reading/saving images, scaling, and format conversion
- [Android Image Processing Kotlin Samples](https://elysiatools.com/en/samples/android-image-processing-kotlin): Android Kotlin image processing examples including reading/saving images, scaling, and format conversion

## Related content

- [File and Data Diff Comparison Tools](https://elysiatools.com/en/hubs/file-data-diff-comparison-tools): Compare two candidate artifacts, choose the right diff path for the format, review structural or semantic changes, and finish with integrity checks when approval needs byte-level certainty.