VTK vs FreeImage

VTK

Mirror of Visualization Toolkit repository (by Kitware)

Image processing

Source Code

gitlab.kitware.com

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FreeImage

A custom distribution of FreeImage, with a CMake-based build system. Used by the Athena Game Framework. (by Kanma)

Image processing

Source Code

freeimage.sourceforge.net

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VTK		FreeImage
	Project
5	Mentions	1
2,482	Stars	52
2.3%	Growth	-
10.0	Activity	0.0
4 days ago	Latest Commit	over 6 years ago
C++	Language	C
GNU General Public License v3.0 or later	License	GNU General Public License v3.0 or later

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

VTK

Posts with mentions or reviews of VTK. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-04-05.

[Discussion] What are some old C++ open source projects you wish were still active?
10 projects | /r/cpp | 5 Apr 2022

You are referring to the Visualization Toolkit right? Looking at that it appears to be actively maintained stilled I think. https://github.com/Kitware/VTK

FreeImage

Posts with mentions or reviews of FreeImage. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning FreeImage yet.
Tracking mentions began in Dec 2020.

What are some alternatives?

When comparing VTK and FreeImage you can also consider the following projects:

OpenCV - Open Source Computer Vision Library

ITK - Insight Toolkit (ITK) -- Official Repository. ITK builds on a proven, spatially-oriented architecture for processing, segmentation, and registration of scientific images in two, three, or more dimensions.

OpenImageIO - Reading, writing, and processing images in a wide variety of file formats, using a format-agnostic API, aimed at VFX applications.

imagick - Go binding to ImageMagick's MagickWand C API

CImg - The CImg Library is a small and open-source C++ toolkit for image processing

CxImage

libvips - A fast image processing library with low memory needs.

SVG++ - C++ SVG library

GD - GD Graphics Library

OpenMVG (open Multiple View Geometry) - open Multiple View Geometry library. Basis for 3D computer vision and Structure from Motion.

Video++ - Video++, a C++14 high performance video and image processing library.