Watermarking techniques are mainly used for protecting intellectual property right. This paper proposes a new hybrid nonblind video watermarking technique using wavelet contourlet transform and nonnegative matrix factorization Wavelet transform processed images are losing edge information. The Contourlet transform has good approximation properties for smooth 2D functions and finds a direct disc...

In this paper, we examine the case of occlusion removal from a class-room video in a remote class application. Written text on writing-board in sequence of video frames is occluded by a human subject. Our goal is to remove the occlusion, in our case it is human subject. As the human subject moves across the writing-board, he or she will occlude different parts or regions of the writing-board. T...

In this paper we propose a novel approach to the pixel level fusion of spatially registered image sequences. This fusion method incorporates a shift invariant extension of the discrete Wavelet Transform, based on the concept of Wavelet Frames which yields an overcomplete signal representation. The advantage of the proposed fusion method is the improved temporal stability and consistency of the ...

We survey the construction of the continuous wavelet transform (CWT) on the two-sphere. Then we discuss the discretization of the spherical CWT, obtaining various types of discrete frames. Finally we give some indications on the construction of a CWT on other conic sections.

In spatio-temporal wavelet video coding with motion compensation (MC), motion-compensated temporal filtering (MCTF) using wavelet filters is combined with spatial wavelet decomposition, allowing for efficient spatio-temporal decorrelation and full scalability. As an extension to conventional MCTF, we introduce spatial lowpass transition filtering (SLTF) leading to an improved lower frame rate q...

This paper proposes wavelet-based moving object segmentation using change detection and background registration technique. The inter-frame difference for detecting change was calculated by using high frequency coefficients in wavelet subbands. The background was constructed with low frequency wavelet coefficients which were the approximated version of the original image. Combining detected chan...

The response analysis of reinforced concrete (RC) structures subjected to strong earthquake motions requires material models that are able to simulate cyclic deformation and damage realistically. This paper presents the results of a study of pinching and softening behaviour in an RC frame subjected to cyclic loading. The experiment was conducted on a full-scale RC frame at Indian Institute of T...

A useful technique in various applications of remote sensing involves the fusion of panchromatic and multispectral images. Wavelet-based approaches to image fusion generally produce high-quality spectral content in fused images. However, the spatial resolution obtained by most wavelet-based methods is less than that obtained by the intensity-hue-saturation (IHS) method. Recent studies show that...