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We propose a method for estimating depth from images captured with a real aperture camera by fusing defocus and stereo cues. The idea is to use stereo-based constraints in conjunction with defocusing to obtain improved estimates of depth over those of stereo or defocus alone. The depth map as well as the original image of the scene are modeled as Markov(More)
We address the problem of super-resolution-obtaining high-resolution images and videos from multiple low-resolution inputs. The increased resolution can be in spatial or temporal dimensions, or even in both. We present a unified framework which uses a generative model of the imaging process and can address spatial super-resolution, space-time(More)
We address the problem of super resolved generation of novel views of a 3D scene with the reference images obtained from cameras in general positions; a problem which has not been tackled before in the context of super resolution and is also of importance to the field of image based rendering. We formulate the problem as one of estimation of the color at(More)
In this paper, we propose a joint problem of routing and interface assignment for Multi-Radio Wireless Mesh Networks (WMNs) to improve the performance of the network. WMNs have recently gained a lot of popularity due to their rapid deployment, low cost, instant communication capabilities and support for many types of application. But, the real-time(More)
This paper addresses the problem of super resolution-obtaining a single high-resolution image given a set of low resolution images which are related by small displacements. We employ reconstruction based approach using MRF-MAP formalism, and use approximate optimization using graph cuts to carry out the reconstruction. We also use the same formalism to(More)
In this paper we carry out a survey on key frame extraction methods for Video Summary. We also discuss the summary evaluation criteria and compare the approaches based on the method, data set and the results. Video Summary is a process of presenting an abstract of entire video within a short period of time. It aims to provide a compact video representation,(More)
We address the problem of video super resolution - obtaining a single high-resolution video whose spatial and temporal resolutions are higher than any of the input low-resolution videos. We employ a reconstruction based approach using MRF -MAP formalism, and use approximate optimization using graph cuts to carry out the reconstruction. We show that in our(More)
In this paper we propose to address the problem of 3D object categorization. We model the 3D object as a 2D Riemannian manifold and propose metric tensor and Christoffel symbols as a novel set of features. The proposed set of features capture the local and global geometry of 3D objects by exploiting the positional dependence of the features. The(More)
We address the problem of detection of image doctoring using correlations of Point Spread Function (PSF) and iterative blind deconvolution. Doctoring is a process of tampering or hampering or changing the content of an image in order to deceive people or rewrite history or exaggerate the situations or customize ground-breaking advances in research,(More)