Title:
画像列中のフリッカの検出および抑制
Document Type and Number:
Japanese Patent JP5750100
Kind Code:
B2
Abstract:
The invention relates to a method, device and computer-program product for detection of undesired temporal variations (flicker) in a sequence of video frames. In one embodiment, frame-wise luminance means are compared with a reference level and the crossing frequency is compared with expected variation frequencies, such as frequencies associated with an illumination frequency through aliasing. The crossings count can be refined by introducing a latency zone around the reference level. In case of a positive detection of an undesired temporal variation, there is further provided a correction method, device and computer-program product using cumulated distribution functions. The visual detriment of flicker-induced saturation of pixels is alleviated either by brightening non-saturated pixels or by replacing the saturated pixels by randomly sampled values in accordance with a reference cumulated distribution function. The invention provides embodiments suitable for real-time processing of streamed video sequences.
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Inventors:
Volker, Bjorn
Craigin, Willem, Baschurn
Craigin, Willem, Baschurn
Application Number:
JP2012514425A
Publication Date:
July 15, 2015
Filing Date:
June 02, 2010
Export Citation:
Assignee:
GOOGLE INC.
International Classes:
H04N7/01; H04N5/21
Domestic Patent References:
| JP2004260574A | ||||
| JP2004222228A | ||||
| JP2007067736A |
Foreign References:
| WO2006051914A1 |
Attorney, Agent or Firm:
Tetsuya Mori
Megumi Konishi
Hide Tanaka Tetsu
Ichi Hirose
Megumi Konishi
Hide Tanaka Tetsu
Ichi Hirose