NDLI: Extracting fluid from a video for efficient post-production

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Extracting fluid from a video for efficient post-production

Content Provider	ACM Digital Library
Author	Okabe, Makoto Anjyo, Ken Onai, Rikio
Abstract	We propose a method to extract fluids from a video that is captured outside a special studio. Since such a video usually has a complex background and the fluids overlap with much transparency, it is a difficult, time-consuming task for a designer to extract them. Our goal is to develop an efficient method to solve the problem: we estimate the background of an input video, and then compute the foreground and alpha matte at each frame. Our method estimates the background by observing only pixels that have little motion at each frame. Given the estimated background, we estimate an initial alpha matte based on the color difference at every pixel between each frame and the estimated background. Since the initial alpha matte usually includes many artifacts, we employ the gradient-domain image processing approach to refine it: our method attenuates unrequired gradients adequately, and then integrate them to recover the refined alpha matte. The foreground, which explains about the color and texture pattern of the fluid itself, is also estimated in a similar manner. We demonstrate that our method enables to extract the fluids from a video, which were difficult to achieve using the previous methods.
Starting Page	53
Ending Page	58
Page Count	6
File Format	PDF
ISBN	9781450316491
DOI	10.1145/2370919.2370928
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2012-08-04
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Post-production Alpha matte Video processing Fluid
Content Type	Text
Resource Type	Article

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