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Computer Graphics Class Notes: Texture Filtering and Mipmapping - Prof. Pradeep Sen, Study notes of Computer Graphics

University of New Mexico (UNM) - Gallup Computer Graphics

Prof. Pradeep Sen

These class notes from ece/cs 412 introduction to computer graphics cover the topics of texture filtering and mipmapping. The differences between screen space samples and texture samples, the use of reconstruction filters, and the problems with standard mipmapping. An introduction to anisotropic filtering is also provided.

Typology: Study notes

Pre 2010

Uploaded on 07/23/2009

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ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

ECE/CS 412

Introduction to

Computer Graphics

Pradeep Sen

Advanced Graphics Lab

Class 18

October 29, 2008

ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

Last time

Started talking about texture mapping

ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

Today

Texture filtering

ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

Texture filtering

Screen space samples are closer together

than texture samples (magnification)

– OpenGL provides two reconstruction filters:

GL_NEAREST, GL_LINEAR

Screen space samples are farther apart

than texture samples (minification)

– Summed area tables

– Mipmapping

ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

Summed area tables

ECE/CS 412 Introduction to Computer Graphics

Pradeep Sen Class 18 – October 29, 2008

Mipmapping

MIP- multum in parvo (many things in a small place)

Technique in which to perform pre-computed

filtering for minification

Space usage 1.3 x more than the standard texture!