A Global Sampling Based Image Matting Using Non-Negative Matrix Factorization
Journal Title: Mehran University Research Journal of Engineering and Technology - Year 2017, Vol 36, Issue 4
Abstract
Image matting is a technique in which a foreground is separated from the background of a given image along with the pixel wise opacity. This foreground can then be seamlessly composited in a different background to obtain a novel scene. This paper presents a global non-parametric sampling algorithm over image patches and utilizes a dimension reduction technique known as NMF (Non-Negative Matrix Factorization). Although some existing non-parametric approaches use large nearby foreground and background regions to sample patches but these approaches fail to take the whole image to sample patches. It is because of the high memory and computational requirements. The use of NMF in the proposed algorithm allows the dimension reduction which reduces the computational cost and memory requirement. The use of NMF also allow the proposed approach to use the whole foreground and background region in the image and reduces the patch complexity and help in efficient patch sampling. The use of patches not only allows the incorporation of the pixel colour but also the local image structure. The use of local structures in the image is important to estimate a high-quality alpha matte especially in the images which have regions containing high texture. The proposed algorithm is evaluated on the standard data set and obtained results are comparable to the state-of-the-art matting techniques
Authors and Affiliations
N. Alam, M. Sarim, A. B. Shaikh
Power Flow and Transient Stability Enhancement using Thyristor Controlled Series Compensation
TL (Transmission Line) congestion is a key factor that affects the power system operational cost. In addition of renewable generation in National Grid of Pakistan, transmission line congestion are frequent. Consequently,...
Impact of TQM and Technology Management on Organizational Performance
In the growing business competitiveness TQM (Total Quality Management) and TM (Technology Management) practices have become important for organizational success. TQM fosters business excellence while TM helps to deal wit...
Impact of Auxiliary Equipment Consumption on Electricity Generation Cost in Selected Power Plants of Pakistan
This study focuses on higher generation cost of electricity in selected TPPs (Thermal Power Plants) in Sindh, Pakistan. It also investigates the energy consumed by the auxiliary equipment of the selected TPPs in Sindh, P...
Governance of Clean Energy in Rural Northwest Pakistan
Effective institutional arrangements at local and national levels are important for promotion of renewable energy in a country. The present study attempts to examine the institutional arrangements for development of dome...
An Evaluation Model for Measuring the Usability of Mobile Office Applications through User Interface Design Metrics
Usage of mobile devices and particularly smart phones has seen an enormous hike due to the advancement of mobile phone technology in recent times. People of different age groups, one way or the other, are now connected t...