Filters logo Filters is a library implementing
image filters for computer vision
and image processing functions
Sponsor Support This Project don't re-invent the wheel !
-> use Filters library ! Logo


- New release 3.3 (codename 2009_12)

- We need skilled software developer to improve this project


To explore the possibilities of Filters, download our friendly software 'FiltersTest' :


and next, to use the library, download the developer API 'FiltersDll' :


-> this archive contain tutorials for language C/C++, Delphi, Python, C# .NET and Visual Basic .NET
-> please, post your question on the forum


-> please see WikiFilters


  • Library, not a software
  • Clear and powerful framework
  • Provided with a simple software for testing : FiltersTest
  • Official API in C, C++, C#, Visual Basic .NET, Delphi, Python
  • Thanks to it's ANSI C interface, Filters is usable in many languages including C, C++, VB, C#, Delphi, Java and also in common scripting languages such as Perl, Python, PHP, TCL or Ruby
  • Many algorithms (filter sobel, convolution, morphology, vectorization, segmentation, blob, blur, anisotropic diffusion, histogram, susan, threshold, texture, contrast, standard deviation, canny, distance map, polygonalisation by douglas-peuker or sklansky-gonzales, contour, edge, adust contrast/brightness, extract part image with a powerfull cutter(grid based or blob based), rotation, median, logPolar, correlation, repositioning, stack, co-occurrence matrix, Hough Transform...)
  • Extremely simple of use
  • Fast
  • Free (LGPL)
  • Clear and powerful framework
  • ROI (Region Of Interest)
  • Mask
  • image functions (draw line, drawRect, drawDisk, RGB channel manipulation, ...)
  • extendable by a powerful plugin API


  • Industrial and Machine vision
  • Computer vision research
  • Scientific use


Screenshot of TutorialC#2

Screenshot of FiltersTest