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

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

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