When we watch a video, in which human hands manipulate objects, these hands may obscure some parts of those objects. We are willing to make clear how the objects are manipulated by making the image of hands semi-transparent, and showing the complete images of the hands and the object. By carefully choosing a Half-Diminished Reality method, this paper proposes a method that can process the video in real time and verifies that the proposed method works well.
He and Zhang @cite_3 use the difference between the current image and the previous image but not the fixed background images. For a certain time, if there is no significant difference, the part of the image is regarded as stable. If the image is changing during a certain period, the corresponding part of the image is treated as a foreground region. The key concept of this approach is that the foreground image is unstable. Please note that an unstable region may not be a foreground region, but that a stable region is always a background region. In this approach, the background region, which is uncovered by a foreground object, is also treated the same way as the moving foreground region. In this sense, this approach does not correctly detect a particular foreground region, but successfully detects the region that contains all of foreground regions.
@cite_3
2100286961
This paper describes our recently developed system which captures pen strokes on physical whiteboards in real time using an off-the-shelf video camera. Unlike many existing tools, our system does not instrument the pens or the whiteboard. It analyzes the sequence of captured video images in real time, classifies the pixels into whiteboard background, pen strokes and foreground objects (e.g., people in front of the whiteboard), extracts newly written pen strokes, and corrects the color to make the whiteboard completely white. This allows us to transmit whiteboard contents using very low bandwidth to remote meeting participants. Combined with other teleconferencing tools such as voice conference and application sharing, our system becomes a powerful tool to share ideas during online meetings