Apparatus and method for generating thumbnail images

Details Apparatus and method for generating thumbnail images Apparatus and method for generating thumbnail images

2007-08-14

2007-08-14

Dang, Duy M. (Department: 2624)

Image analysis

Image compression or coding

Interframe coding

C382S168000

Reexamination Certificate

active

10331671

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.

REFERENCES:
patent: 6154771 (2000-11-01), Rangan et al.
patent: 6628830 (2003-09-01), Yamazoe et al.

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