C++ Image Processing

10.0

9.8

OpenCV

9.9

9.7

tesseract-ocr

8.2

6.5

OpenMVG (open Multiple View Geometry)

7.3

9.8

VTK

6.8

9.2

OpenImageIO

6.3

7.8

OpenEXR

20 Image Processing libraries and projects

OpenCV

10.0 9.8 L1 C++

Open source computer vision. [BSD]
tesseract-ocr

9.9 9.7 L1 C++

An OCR engine. [Apache2]
OpenMVG (open Multiple View Geometry)

8.2 6.5 C++

Promoting 3d reconstruction from images through multiple-view geometry algorithms and ready to use pipelines.
VTK

7.3 9.8 L1 C++

Open-source, freely available software system for 3D computer graphics, image processing and visualization. [BSD]
OpenImageIO

6.8 9.2 L1 C++

Powerful image and texture wrangling library with support for a wide number of common lossy and RAW formats. [Modified BSD]
OpenEXR

6.3 7.8 L1 C++

Cross-platform library for high dynamic range imaging. [Modified BSDF]
Magick++

5.8 4.4 Go

ImageMagick program interfaces for C++. [Apache2]
ITK

5.8 9.6 L2 C++

An open-source, cross-platform system for image analysis. [Apache2 from ITK 4.0]
CImg

5.6 9.1 C++

A small, open source, C++ toolkit for image processing. [Own LGPL or GPL]
GD

5.1 7.3 L2 C

GD Graphics Library, famously used in PHP for image loading/manipulation & thumbnail generation. [custom permissive license, requires mention in user docs] website
Video++

5.1 4.0 L2 C++

A C++14 high performance video and image processing library. [MIT]
VIGRA

4.8 6.2 L1 C++

A generic C++ computer vision library for image analysis. [MIT X11]
hiptext

4.2 0.3 L3 C++

Turn images into text better than caca/aalib
libvips

4.0 8.4 L3 C

A fast image processing library with low memory needs. [LGPL] website
GDCM

3.7 8.8 L1 C++

Grassroots DICOM library.
SVG++

3.6 5.0 L3 C++

The most advanced SVG reading library for C++
CxImage

3.0 0.0 L1 C++

An image processing and conversion library to load, save, display, transform BMP, JPEG, GIF, PNG, TIFF, MNG, ICO, PCX, TGA, WMF, WBMP, JBG, J2K images. [zlib]
Boost.GIL

2.6 9.2 L3 C++

Generic Image Library.
FreeImage

2.1 0.0 L2 C

An open source library that supports popular graphics image formats and others as needed by today's multimedia applications. [GPL2 or GPL3]
DCMTK

- -

DICOM Toolkit.

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