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Article 2

Image rotation

Category. Pixel graphics rendering software development

Reference. Case study: EGE — embedded graphic engine.

Download rotator for Win32 (zip, 113 Kb)

Original and rotated images

The sample was developed for demonstration of antialiased image rotation. Rotation algorithm is based on averaging filter idea. Here you find this demo description.

The sample package includes 3 files — an application, sample image and description:

  • rotator.exe — rotator application,
  • sample.bmp — 24-bit sample image,
  • readme.txt — description.

Be aware of the fact that this sample uses OpenGL so it should be installed on your computer.

Rotation

Start up rotator.exe application. Load any 24-bit BMP image. To rotate the image choose Set >> Rotation... or click R button in toolbar. Enter any angle of rotation and click OK.

Image rotation - screenshot Fig. 1. Image rotation.

 

Write to the author of the article — Sergey Chernenko.