Image processing apparatus and method
US6665446B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/124
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A color-space conversion processor converts input digital image data into YUV color space, and a wavelet conversion processor performs wavelet conversion processing on the data. A face-area recognition processor extracts a face area in the image based on the obtained conversion coefficients. A quantization processor performs quantization processing on the input conversion coefficients while changing quantization coefficients used in the quantization processing in and out of the extracted face area. A variable-length coding processor encodes the quantized coefficients. A code synthesizing processor synthesizes the obtained respective color component code data with information indicating the face area extracted by the face-area recognition processor, and outputs the synthesized data as a code string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.