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Category: Image Processing

January 24, 2011

2D Minimum and Maximum Filters: Algorithms and Implementation Issues

A while back I needed to implement fast minimum and maximum filters for images. I devised (what I thought was) a clever approximation scheme where…

June 15, 2010

Region Quadtrees in C++

(Original image by GoAwayStupidAI). Below are four C++ implementations of the region quadtree (the kind used for image compression, for example). The different implementations…

May 12, 2010

Catching Common Image Processing Programming Errors with Generic Unit Tests

When implementing image algorithms, I am prone to make these mistakes: swapping x and y; working on the wrong channel; making off-by-one errors, especially…

April 16, 2010

Simple, Fast* Approximate Minimum / Maximum Filters

*Fast = not toooo slow… For the image restoration tool I had to implement min and max filters (also erosion and dilation—in this case with a…

April 15, 2010

Experimental Tool for Removing Unwanted Artefacts in Textures

Many textures used for 3D art start from photographs. Ideally, such textures should be uniformly lit so that the texture does not interfere with…

April 7, 2010

Poisson Disk Sampling Example Code

I decided to put the Poisson disk sampling code here for download since the site that hosted it is down. The code accompanies the…

May 28, 2009

Getting More out of Seamless Tiles

I wrote an article for Dev.Mag covering some techniques for working with seamless tile sets such as making blend tiles, getting more variety with procedural colour  manipulation,…

December 15, 2008

A simple texture algorithm – faster code and more results

Faster Code A while back I wrote about a simple texture algorithm that I have been exploring. The Python implementation was very slow –…

November 15, 2008

Quadtrees

The code below implements some quadtree extensions, as discussed in another Dev.Mag tutorial about quadtrees (see Issue 27). The tutorial covers the following topics:…

November 14, 2008

A Simple Procedural Texture Algorithm – More Results and Code

In a previous post I explained a simple algorithm for generating textures. Below are some more examples of the kinds of textures that the…

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Simulation vector field quadtree grids image partitioning probability game tools 2D editor Perlin noise compression Mathematics random blending distribution function functional equations Game Maker artificial intelligence sum functional equation Game Development C++ computer graphics Dev.Mag random number generation discrete calculus optimisation spatial partitioning procedural texture tiles difference equation level editor maintainability Image Processing z-transform Python filtering white noise response curve sampling Special Numbers Library AI quadtrees algorithm random distribution

Categories

  • Algorithms (25)
  • C++ (3)
  • Downloads (13)
  • Game Development (18)
  • Games (1)
  • Image Processing (11)
  • Java (2)
  • Mathematics (11)
  • Python (6)
  • Simulation (5)
  • Snippet (8)
  • Tools (4)
  • Tutorial (9)
  • Web Development (1)

Blogroll

  • Dev.Mag

Tag cloud

Dev.Mag quadtrees Mathematics maintainability white noise game tools Game Maker Image Processing compression sampling functional equation C++ level editor tiles editor random number generation functional equations Special Numbers Library distribution function Perlin noise discrete calculus difference equation filtering Game Development sum spatial partitioning response curve quadtree computer graphics probability random distribution AI image partitioning Simulation blending artificial intelligence vector field Python grids random procedural texture z-transform algorithm optimisation 2D
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