NDLI: Objective image quality assessment of texture compression

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Objective image quality assessment of texture compression

Content Provider	ACM Digital Library
Author	Olano, Marc Griffin, Wesley
Abstract	Texture compression is widely used in real-time rendering to reduce storage and bandwidth requirements. Recent research in compression algorithms has explored both reduced fixed bit rate and variable bit rate algorithms. The results are evaluated at the individual texture level using Mean Square Error, Peak Signal-to-Noise Ratio, or visual image inspection. We argue this is the wrong evaluation approach. Compression artifacts in individual textures are likely visually masked in final rendered images and this masking is not accounted for when evaluating individual textures. This masking comes from both geometric mapping of textures onto models and the effects of combining different textures on the same model such as diffuse, gloss and bump maps. We evaluate final rendered images using rigorous perceptual error metrics. Our method samples the space of viewpoints in a scene, renders the scene from each viewpoint using variations of compressed textures, and then compares each to a ground truth using uncompressed textures from the same viewpoint. We show that masking has a significant effect on final rendered image quality, that graphics hardware compression algorithms are too conservative, and reduced bit rates are possible while maintaining quality.
Starting Page	119
Ending Page	126
Page Count	8
File Format	PDF
ISBN	9781450327176
DOI	10.1145/2556700.2556711
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2014-03-14
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Image quality assessment Mip mapping Bump maps Texture compression
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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