Format
Polynomial Texture Map
Summary
- Name
- Polynomial Texture Map
- Identifiers
- PUID: fmt/519
- Format type
- Image (Raster)
- Description
- Developed by Hewlett Packard, Polynomial texture maps (PTMs) are an extension to conventional texture maps that allow enhanced image quality. As opposed to storing a color per pixel, these PTM’s store second-order bi-quadratic polynomial coefficients per pixel. These polynomials model the changes that appear to a pixel color based on either light source position or viewing direction.
- File extensions
-
ptm - Submitted by
- Digital Preservation Department / The National Archives
- Developed by
- Hewlett Packard Company
- Supported by
- Hewlett Packard Company
Internal signatures
Polynomial Texture Map
- Description
- BOF: PTM_1.2.PTM_FORMAT_
- Provenance
- Files held internally, http://www.hpl.hp.com/techreports/2001/HPL-2001-104.pdf
Byte sequences
- Min Frag Length
- Absolute from BOF
- Offset
- 0
- Max offset
- 0
- Byte Sequence
50544D5F312E320A50544D5F464F524D41545F- Endianness
- None
Changelog
-
V68
- Release date
- 1 May 2013
-
Added format
Polynomial Texture Map: Outline Entry Added.
-
Added signature
Polynomial Texture Map: Signature developed through PRONOM Research.