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Image-adapted visually weighted quantization matrices for digital image compression
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1994 |
| Description | A method for performing image compression that eliminates redundant and invisible image components is presented. The image compression uses a Discrete Cosine Transform (DCT) and each DCT coefficient yielded by the transform is quantized by an entry in a quantization matrix which determines the perceived image quality and the bit rate of the image being compressed. The present invention adapts or customizes the quantization matrix to the image being compressed. The quantization matrix comprises visual masking by luminance and contrast techniques and by an error pooling technique all resulting in a minimum perceptual error for any given bit rate, or minimum bit rate for a given perceptual error. |
| File Size | 1185606 |
| Page Count | 28 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19940024872 |
| Archival Resource Key | ark:/13960/t9c58j31w |
| Language | English |
| Publisher Date | 1994-01-25 |
| Access Restriction | Open |
| Subject Keyword | Computer Operations And Hardware Image Resolution Image Processing Digital Techniques Data Compression Perceptual Errors Discrete Cosine Transform Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
