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5 - Textures

Published online by Cambridge University Press:  04 May 2022

Richard Ansorge
Affiliation:
University of Cambridge
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Summary

Chapter 5 continues the theme of digital image manipulation and considers transformations such as rotation or scaling with required pixel interpolation to create the most accurate final result. The GPU hardware texture units are used for this and their features are discussed. The cx utilities provided with our code include wrappers that significantly simplify the creation of CUDA textures. Curiously, these hardware texture units are rarely discussed in other CUDA tutorial material for scientific applications but we find they can give a 5-fold performance boost. We show how OpenCV can be used to provide a simple GUI interface for viewing the transformed images with very little coding effort. We end the chapter with a fully working 3D image registration program using affine transformations applied to volumetric MRI data sets. The 3D affine transformations are about 1500 times faster on the GPU than on the host CPU and a full registration between two MRI images of size 256 × 256 × 256 takes about one second.

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Programming in Parallel with CUDA
A Practical Guide
, pp. 142 - 177
Publisher: Cambridge University Press
Print publication year: 2022

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  • Textures
  • Richard Ansorge, University of Cambridge
  • Book: Programming in Parallel with CUDA
  • Online publication: 04 May 2022
  • Chapter DOI: https://doi.org/10.1017/9781108855273.006
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  • Textures
  • Richard Ansorge, University of Cambridge
  • Book: Programming in Parallel with CUDA
  • Online publication: 04 May 2022
  • Chapter DOI: https://doi.org/10.1017/9781108855273.006
Available formats
×

Save book to Google Drive

To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.

  • Textures
  • Richard Ansorge, University of Cambridge
  • Book: Programming in Parallel with CUDA
  • Online publication: 04 May 2022
  • Chapter DOI: https://doi.org/10.1017/9781108855273.006
Available formats
×