Experiments in Texture Perception
Abstract
Over the past year, a special graphics display has been constructed to further research in texture perception. This display has the ability to produce 440 x 440 point patterns consisting of complex (computer-generated) sinusoidal modulations of luminance that may be altered every 20 msec. A section of this report describes the 9 subsystems of the display, and elaborates its other capabilities, such as on-line variation of 100 x 100 random-dot (Julesz) patterns. With this display we are now in the process of determining the minimum number of spatial frequencies necessary to 'match' one and two dimensional textures. Because such textures can be described exactly in terms of their Fourier components, the task is to determine just how many of these components are necessary to lead an observer to believe that the partially reconstructed texture is, in fact, the complete physical representation. At present, for linear one and two-dimensional texture patterns, only four spatial frequencies are sufficient to produce 'texture metamers', at least for normal TV viewing conditions. Work is currently in progress to determine the generality of this finding, particularly for texture patterns composed of sinusoidal products.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1976
- Accession Number
- ADA033834
Entities
People
- Whitman A. Richards
Organizations
- Massachusetts Institute of Technology