Object-background segmentation from video
MetadataShow full item record
Fast and accurate algorithms for background-foreground separation are an essential part of <p/>any video surveillance system. GMM (Gaussian Mixture Models) based object segmentation <p/>methods give accurate results for background-foreground separation problems but are <p/>computationally expensive. In contrast, modeling with only single Gaussian improves the <p/>time complexity with the reduction in the accuracy due to variations in illumination and <p/>dynamic nature of the background. It is observed that these variations affect only a few <p/>pixels in an image. Most of the background pixels are unimodal. We propose a method <p/>to account for the dynamic nature of the background and low lighting conditions. It is an <p/>adaptive approach where each pixel is modeled as either unimodal Gaussian or multimodal <p/>Gaussians. The flexibility in terms of number of Gaussians used to model each pixel, along <p/>with learning when it is required approach reduces the time complexity of the algorithm <p/>significantly. To resolve problems related to false negative due to the homogeneity of color <p/>and texture in foreground and background, a spatial smoothing is carried out by K-means, <p/>which improves the overall accuracy of proposed algorithm. The shadow causes the problem <p/>in many applications which rely on segmentation results. Shadow cause variation in <p/>RGB values of pixels, RGB value dependent GMM based method can’t remove shadow <p/>from detection results. The preprocessing stage involving illumination invariant representation <p/>takes care of the object shadow as well.
- M Tech Dissertations 
Showing items related by title, author, creator and subject.
Temporal Consistent Video Manipulation : Facial Expression Transfer video to video Rajyaguru, Keval Atulkumar (2021)Facial expression transfer is an important problem in computer vision community due to its applicability in human computer interaction, facial animation, etc. Most of the existing approaches mainly deal with images. However, ...
Video documentation of success story of watershed development project, Gujarat Abhay Kumar; Prasad, Manoj Kumar (Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Watershed development programme is a flagship programme started by Government of India to increase the crop production by arresting soil erosion and ensure irrigation facility to farmers. In Gujarat, Ministry of Rural ...
Development of difference detection algorithm for surveillance video compression Marvaniya, Hitul D. (Dhirubhai Ambani Institute of Information and Communication Technology, 2011)Video surveillance is widely used tool in today’s era for improving public and residential safety. Here the size of the video data is much higher due to large number of surveillance cameras scattered over large area and ...