Title :
Movie and video scale-time equalization application to flicker reduction
Author_Institution :
Centre de Math. et de Leurs Applications, Ecole Normale Superieure de Cachan, France
Abstract :
Image flicker is a general film effect, which can be observed in videos as well as in old films, and consists of fast variations of the frame contrast and brightness. Reducing flicker of a sequence improves its visual quality and can be an essential first treatment before ulterior manipulations. This paper presents an axiomatic analysis of the problem, which leads to a global and fast method of "de-flicker," based on the scale-space theory. The stability of this process, called scale-time equalization, is ensured by the scale-time framework. Results on different sequences are given and show great visual improvement.
Keywords :
image sequences; video signal processing; deflicker; film effect; flicker reduction; image flicker; movie scale-time equalization; scale-space theory; video scale-time equalization; visual quality; Brightness; Chemical products; Chemical technology; Degradation; Filtering; Histograms; Motion pictures; Sampling methods; Stability; Video surveillance; Equalization; flicker; histogram; movie; scale-space; scale-time; Algorithms; Artifacts; Image Enhancement; Image Interpretation, Computer-Assisted; Information Storage and Retrieval; Time Factors; Video Recording;
Journal_Title :
Image Processing, IEEE Transactions on
DOI :
10.1109/TIP.2005.860328
