Apparatus and method for generating thumbnail images
US7257261B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 2002 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Apr 12, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/45
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses an apparatus for automatically generating thumbnail images for a video browser and a video recording and reproducing device, and a method therefor. A difference between histograms of two DC images of a current frame I picture and a previous frame I picture is calculated and compared with a predetermined reference value for deciding a stabilization section. When the difference between the histograms of the current I picture DC image and the previous I picture DC image does not exceed the reference value, the corresponding I picture DC image is outputted as the thumbnail image. Here, a blank test is executed to exclude a dark original image whose contents are indistinguishable. Only the DC image of the I picture passing through the blank test is outputted as the thumbnail image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.