Prathap M. Nair

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We present an accurate and robust framework for detecting and segmenting faces, localizing landmarks and achieving fine registration of face meshes based on the fitting of a facial model. This model is based on a 3D Point Distribution Model (PDM) that is fitted without relying on texture, pose or orientation information. Fitting is initialized using(More)
We present a novel approach to 3D face recognition using compact face signatures based on automatically detected 3D landmarks. We represent the face geometry with inter-landmark distances within selected regions of interest to achieve robustness to expression variations. The inter-landmark distances are compressed through Principal Component Analysis and(More)
We present a novel approach to matching 3D faces with expressions, deformations and outliers. The matching is performed through an accurate and robust algorithm for registering face meshes. The registration algorithm incorporates prior anthropometric knowledge through the use of suitable landmarks and regions of the face to be used with the Iterative(More)
We present a novel approach to accurately detect landmarks and segment regions on face meshes without the use of texture, pose or orientation information. The proposed approach is based on a 3D point distribution model (PDM) that is fitted to the region of interest using candidate vertices extracted from low-level feature maps. The robustness of the(More)
We present a method for quantifying and localising changes in two facial scans of the same person taken at two different time instants. The method is based on rigid registration and semantic feature extraction, followed by discrepancy computation. The proposed method combines the Landmark Transform (LT) method, which is applied on semantic feature points,(More)
One hundred consecutive cases of 'first attack' of acute rheumatic fever were studied. There were 52 males and 48 females, constituting 1.12% of total hospital admissions. Nearly 10% of children were below the age of 5 years, stressing the early onset of rheumatic fever in tropics. Only 47% gave a definite history of overcrowding at home. Sore throat was(More)