B. Vijayakumar

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To recognize three-dimensional objects bounded by smooth curved surfaces from monocular image contours, viewpoint-dependent image features must be related to object geometry. Contour bitangents and innections along with associated parallel tangents points are the projection of surface points that lie on the occluding contour for a ve-parameter family of(More)
The silhouette of a smooth 3D object observed by a moving camera changes over time. Past work has shown how surface geometry can be recovered using the deformation of the silhouette when the camera motion is known. This paper addresses the problem of estimating both the full Euclidean surface structure and the camera motion from a dense set of silhouettes(More)
We represent arbitrary smooth curved 3D shapes by a discrete set of HOT curves where a surface admits High Order Tangents. These curves determine the structure of the image contours and its catastrophic changes, and there is a natural correspondence between some of them and monocular contour features such as in-ections and bitangents. We present a method(More)
A b s t r a c t. This paper presents viewpoint-dependent constraints that relate image features such as t-junctions and inflections to the pose of curved 3D objects. These constraints can be used to recognize and locate object instances in the imperfect line-drawing obtained by edge detection from a single image. For objects modelled by implicit algebraic(More)
A good watermarking technique embeds information into a carrier image with virtually imperceptible modification of the image. The present paper found a novel fact that by inserting the watermark using Least Significant Bit (LSB), the grey value of the image pixel either remains same or increases or decreases to one. The present paper is focused on this(More)
Recently, a novel shape r epresentation of general curved objects, which is suitable for object recognition, has been proposedd it is based on a set of surface curves, named HOT curves, deened b y t h e l o cus of points where a line has high order tangency with the surface e 1 6 ]. These curves determine the structure o f a n o b j e ct's image contours(More)
—The information retrieval of multimedia data in a distributed environment remains an active area of research. This paper draws upon the functions relating to allocation, storage and retrieval of multimedia data that is stored at one or more sites in a distributed environment. The multimedia data considered in the current work are texts, images, videos,(More)
Wafer Level Chip Scale Package (WLCSP) assemblies were tested under high temperature and high current conditions. Electromigration damage was observed along with accelerated diffusion and intermetallic compound growth at the solder / Under Bump Metallization (UBM) interface. Final electrical failure typically occurred due to a void created in the(More)
PURPOSE To report the results of screening first degree relatives of persons identified with primary open angle glaucoma in a tertiary eye hospital glaucoma services. DESIGN A cross-sectional study of first degree relatives of persons with primary open angle glaucoma. MATERIALS AND METHODS First degree relatives of patients identified with primary open(More)