Layer Extraction, Removal and Completion of Indoor Videos: A Tracking Based Approach
Vardhman Jain (homepage)
Image segmentation and layer extraction in video refer to the process of segmenting the image or video frames into various constituent objects. Automatic techniques for these are not always suitable, as the objective is often difficult to describe. With the advent of interactive techniques in the field, these algorithms are now usable for selecting an object of interest in an image or video precisely with less efforts. Object segmentation brings up various other possibilities like cut and paste of objects from one image or video to another. Object removal in image and videos is another application of interest. As the name suggest the task is to eliminate an object from the image or video. This involves recovering the information of the background previously occluded by the object. Object removal in both image and videos have found interesting applications especially in the entertainment industry. The concept of filling-in of information from the surrounding region for images and surrounding frames for videos has been applied for recovering damaged images or clips. This thesis presents two new approaches. The first is for object segmentation or layer extraction from a video. This method allows segmenting complex objects in videos, which can have difficult motion model. The algorithm integrates a robust points tracking algorithm to a 3D graph cuts formulation. Tracking is used for propagating the user given seeds in key frames to the intermediate frames which helps to provide better initialization to the graph cuts optimization. The second is an approach for video completion in indoor scenes. We propose a novel method for video completion using multiview information without applying a full frame or complete motion segmentation. The heart of the algorithm is a method to partition the scenes into regions supporting multiple homographies based on a geometric formulation and thereby providing precise segmentation even at the points where the actual scene information is missing due to the removal of the object. We demonstrate our algorithms on a number of representative videos. We also present a few directions for future work that extends the work presented here.
|Year of completion:||2006|
Vardhman Jain and P.J. Narayanan - Layer Extraction Using Graph Cuts and Feature Tracking, The 3rd International Conference on Visual Information Engineering 26-28 September 2006 in Bangalore, India. [PDF]