Icon of program: DiffImg Portable

DiffImg Portable for Windows

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Editors’ Review

Download.com staff
This tool compares two same-sized images, highlighting pixel differences with a color mask. It computes error statistics for technical use cases like compression analysis and non-regression testing.
Enlarged image for DiffImg Portable
DiffImg Portable 0/1

  • Pros

    • Highlights pixel differences with a color mask overlay
    • Computes mean, RMS, and min/max error statistics
    • Features single and dual panel viewing modes
    • Compares entire directories of images in batch mode
    • Extensible file format support via external library plugins

  • Cons

    • Input images must be the same size
    • Does not process image alpha channel data
    • Float texture formats are not taken into account
    • Functionality is focused on RGB images only
Icon of program: DiffImg Portable

DiffImg Portable for Windows

Download now

Used DiffImg Portable for Windows?

Explore More

Full Specifications

GENERAL
Release
Latest update
Version
2.0
OPERATING SYSTEMS
Platform
Windows
Operating System
  • Windows 10
  • Windows 8
  • Windows XP
  • Windows 7
  • Windows Vista
Additional Requirements
None
POPULARITY
Total Downloads
142
Downloads Last Week
14
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Developer’s Description

By PortableApps
Compare two images and find the pixel difference between the images.
DiffImg is a simple image comparison tool which takes two images with the same size as input. Some statistics are computed and the positions where pixel differs are displayed as a color mask. It is used to check compression level comparison, raytracing parameterization optimization, and non regression tests for 3D engine. DifffImg use QImage as inner format so it has been tested only on RGB image, so alpha channel or float texture aren't take into account. Features include image difference display: a yellow or red mask can overlay the original or modified images, single or dual panel mode, statistic computation: mean error, RMS error, and min/max are computed, histogram of error, "Slideshow": can compare directory of image so you can switch to the previous or next comparison if you have two folders with the same image list, it can read basic formats as BMP, PNG, and JPG, you can add more formats if needed by using bridge plug-ins to the FreeImage or the Devil libraries, and basic batch mode.
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