ULIS vs VTK

ULIS

Utility Library for Imaging Systems (by Praxinos)

Image processing

DISCONTINUED

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VTK

Mirror of Visualization Toolkit repository (by Kitware)

Image processing

Source Code

gitlab.kitware.com

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ULIS		VTK
	Project
-	Mentions	5
34	Stars	2,501
-	Growth	1.7%
6.7	Activity	10.0
over 1 year ago	Latest Commit	3 days 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.

ULIS

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

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

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
best c++ libraries for building a business software without paying licenses or show source code
1 project | /r/cpp_questions | 5 Feb 2022
Getting 3D to work with GTK
1 project | /r/GTK | 14 Dec 2021

While this example is outdated: https://github.com/Kitware/VTK/blob/master/Wrapping/Python/vtkmodules/gtk/GtkGLExtVTKRenderWindow.py
VTK: Open-source software for image processing, 3D graphics and visualization
1 project | /r/CKsTechNews | 4 Mar 2021

1 project | news.ycombinator.com | 4 Mar 2021

What are some alternatives?

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

OpenCV - Open Source Computer Vision Library

SVG++ - C++ SVG 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.

OpenEXR - The OpenEXR project provides the specification and reference implementation of the EXR file format, the professional-grade image storage format of the motion picture industry.

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

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

tesseract-ocr - Tesseract Open Source OCR Engine (main repository)

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

imagick - Go binding to ImageMagick's MagickWand C API