nV News Deals Shop Archive Search Files Forum Feed Articles IRC Chat GeForce.com


Search Site
Ads by Google
Links To NVIDIA
Drivers
Products
Communities
Support
NVIDIA Blog
News Room
About NVIDIA
GeForce Technology
CUDA
DirectX 11
Optimus
PhysX
SLI
3D Vision
3D Vision Surround
Articles
GeForce GTX 580
GeForce GTX 570
GeForce GTX 560 Ti
GeForce GTX 480
GeForce GTX 465
GeForce GTX 460
GeForce GTS 450
GeForce GTX 295
GeForce GTX 280
GeForce GTX 260
GeForce GT 240
GeForce 9800 GTX
GeForce 9800 GX2
GeForce 9600 GT
GeForce 8800 Ultra
GeForce 8800 GTX
GeForce 8800 GTS
GeForce 8800 GT
GeForce 8600 GTS
GeForce 8500 GT
GeForce 7950 GX2
GeForce 7950 GT
GeForce 7900 GTX
GeForce 7900 GS
GeForce 7800 GTX
Watercooling Project
My Book 500GB
Raptor Hard Drive
Guide To Doom 3
EVGA Stuff
EVGA E-LEET
EVGA Precision
GPU Voltage Tuner
OC Scanner
SLI Enhancement
EVGA Bot
EVGA Gear
Reviews and Awards
Associates
Benchmark Reviews
Fraps
GeForce Italia
GPU Review
Hardware Pacers
LaptopVideo2Go
MVKTECH
News3D (NVITALIA)
OutoftheBoxMods
OSNN.net
Overclocker Cafe
PC Extreme
PC Gaming Standards
PhysX Links & Info
TestSeek
3DChip (German)
8Dimensional
NVIDIA GeForce 6600 GT Preview - Page 3 of 6

OPENGL TEXTURE FILTERING

A useful program to have when conducting an image quality analysis is TheCompressonator, which was written by ATI and is a developer tool used to compress textures and create mipmap levels. Version 1.20.1042 was released in July and contains a number of enhancements and bug fixes.

The feature of TheCompressonator that is exercized in this examination is the texture and image comparison feature. TheCompressonator compares two images and will visually point out differences between them. When two similar images are compared, the differences may only become visible after the brightness level is increased in TheCompressonator.

The examples below illustrate the output from TheCompressonator and consists of an image with 8X anisotropic filtering on the left and an image with 1X anisotropic filtering on the right. The middle image highlights the differences between them, which can be brightened and enlarged. The brightness was increased by 400% in the second image and by 1600% in the third image.

TheCompressonator Output
Default Brightness
Difference Brightened by 400%
Difference Brightened by 1600%

The following javascript applets will demonstrate the effects of the various levels of anisotropic filtering that are available in Doom 3. Clicking the links underneath each image will reveal the screenshot that was taken with the chosen level of anisotropic filtering enabled. Each image in the comparison averages around 50 KB in size.

After each image is downloaded and saved in your browser cache, you will be able to quickly switch between them to see the differences in the levels of anisotropic filtering. As you switch between the images, subtle changes will occur. The most noticeable changes will occur during the transition from 1X to 2X anisotropic.

High Quality Image Setting - Scene 1
1X Anisotropic | 2X Anisotropic | 4X Anisotropic | 8X Anisotropic

High Quality Image Setting - Scene 2
1X Anisotropic | 2X Anisotropic | 4X Anisotropic | 8X Anisotropic

High Quality Image Setting - Scene 3
1X Anisotropic | 2X Anisotropic | 4X Anisotropic | 8X Anisotropic

In many cases, applying anisotropic filtering beyond a 4X level becomes counterproductive.

Next Page: Direct3D Texture Filtering

Last Updated on September 7, 2004


Table of Contents

Advertisement

nV News - Copyright © 1998-2014.
Search Products
Search
for


Ads by Casale
Tweaks
Metro: Last Light
PlanetSide 2
Miscellaneous Links
AutoDesk 123 Design
Build Your Gaming PC
FPS vs. Frame Time
Free Games And MMOs
GeForce SLI Technology
HPC For Dummies
PC Game Release Dates
Play Classic PC Games
Steam Hardware Survey
Video Game Designers
TechTerms Dictionary
GPU Applications
AMD GPU Clock Tool
AMD System Monitor
ATITool
aTuner
EVGA E-LEET
EVGA OC Scanner
EVGA Precision
EVGA Voltage Tuner
Gainward ExperTool
GPU-Shark
GPU Voltage Tuner
Fraps
FurMark
GLview
GPU Caps Viewer
GPU PerfStudio
GPU Shark
GPU-Z
MSI Afterburner
nHancer
NiBiTor
NVClock (Linux)
NVFlash
NVIDIA Inspector
NvTempLogger
NVTray
PowerStrip
RivaTuner
SLI Profile Tool
The Compressonator
3DCenter Filter Test
3DMark 11
3DMark Vantage
PhysX Applications
Cell Factor Revolution
Cryostatis Tech Demo
Cube Wall Demo
PhysX FluidMark
Fluid Physics
NV PhysX Tweaker
NVIDIA OPTIX 2
PhysX Downloads
PhysX at YouTube
Add-In Partners
AFOX
ASUS
AXLE
BFG Technologies
BIOSTAR
Chaintech
Colorful
ELSA
emTek
EVGA
GAINWARD
GALAXY
GIGABYTE
FORSA
FOXCONN
Inno3D
Jaton
Leadtek
Manli
MSI
Palit
PNY
Point of View
Prolink
SPARKLE
XFX
ZOGIS
ZOTAC