Video compression by matching human perceptual channels
| Autor: | Carl F. R. Weiman |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Visual perception
business.industry Computer science media_common.quotation_subject ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Image processing Contrast (vision) Computer vision Spatial frequency Artificial intelligence business Image resolution Digital signal processing Image compression media_common Data compression |
| Zdroj: | Visual Information Processing |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.179283 |
| Popis: | A three-stage color video compression system capable of 1,000-to-i compression has been implemented in real time on aVME based prototype system. Stage 1 digitizes the image at CCD camera resolution, and splits the data into color andcontrast channels, in conformance with human perceptual channels. Stage 2 maps coordinates of color imagery to mimicthe geometzy of the human retinotopic mapping from retina to brain. In parallel, stage 2 also applies spatial frequencymasks to the contrast channel, extracting texture patches resembling the patterns found in so-called simple cells of thevisual cortex. Stage 2 therefore corresponds to a geometric "impedance match" to human visual perceptual channels,achieving compression by discarding information which cannot be perceived. Stage 3 consists of conventional numeric data compression. The system is particularly suited to remote driving because it provides wide field of view, color and motion cues at low latencies (less than 100 ms) broadcast at low data rates which do not require lineof-sight transmission. Other applications |
| Databáze: | OpenAIRE |
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