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In this paper, a modified algorithm for the detection of nasal and temporal eye corners is presented. The algorithm is a modification of the Santos and Proenka Method. In the first step, we detect the face and the eyes using classifiers based on Haar-like features. We then segment out the sclera, from the detected eye region. From the segmented sclera, we segment out an approximate eyelid contour...
In this paper, we consider Generalized Gaussian (GG) distribution to model the additive noise source in underwater acoustic (UWA) communication. Since communication in oceanic medium is dominated by both prevailing and spontaneous noise sources, we model the resultant noise distribution as mixture of GG distribution. Owing to the complexity in optimal detector design with GG noise model, we apply...
Synthetic aperture radar (SAR) images are inherently affected by a multiplicative noise known as speckle. In this paper, we propose a despeckling filter based on G0-distribution and formulate maximum a posteriori (MAP) estimator for texture amplitude. Here, the texture is modeled using inverse Gamma distribution which portrays areas with varying degree of heterogeneity. We estimate the roughness parameter...
This paper presents a novel two-pass dynamic time warping (DTW) approach to build Query-by-Example Spoken Term Detection (QbE-STD) system for Zero Resource Languages. An unconstrained-endpoint dynamic time warping (UE-DTW) algorithm is used to locate the query term occurrences in a long conversational audio. The proposed approach uses a segmental DTW, wherein search is carried out only at syllable...
A 6-pole pre select filter based on quarter cut dielectric resonators has been designed and developed at C-band. This PSF is intended for the use in a satellite application where it will provide better than 120dBc rejection to the satellite transmit band. The PSF has a bandwidth of 60 MHz and synthesis of filtering function is done using chebyshev polynomials. The loading of hollow waveguide cavity...
Shouted speech signals have been studied mostly for utterances or word segments. In the production features derived over these segments, the differences between normal and shouted speech may sometimes be masked by variations due to pauses and unvoiced regions. Also, our recent study of electroglottograph signals has highlighted the usefulness of examining changes in the glottal excitation source characteristics...
This paper focuses on the Routing and Spectrum Allocation (RSA) problem in Coherent Optical Orthogonal Frequency Division Multiplexing (CO-OFDM) Elastic Optical Networks (EON) with consideration of transmission impairments. A majority of the literature in EON is based on improving the spectral efficiency and efficient utilization of available spectral resources. However, transmission impairments such...
This paper explores the viability of Hartley Transforms as an alternative to Fourier Transforms for Face Recognition. The paper provides a brief introduction to Hartley Transform, which is a reasonable alternate to Fourier Transform due to its similarities in the choice of basis function. Correlation filter is a pattern recognition tool that is efficient and robust. This includes extraction of features...
We present a no-reference (NR) image quality assessment (IQA) algorithm that is inspired by the representation of visual scenes in the primary visual cortex of the human visual system. Specifically, we use the sparse coding model of the area V1 to construct an overcomplete dictionary for sparsely representing pristine (undistorted) natural images. First, we empirically demonstrate that the distribution...
In this work, a new feature, residual sinusoidal peak amplitude (RSPA), is proposed for emotion classification. The RSPA feature is evaluated from the LP residual of the speech signal using sinusoidal model. Residual signal is a major source of the excitation and it is expected that emotional information can be well manifested in the residual signal. The effectiveness of the proposed feature is explored...
Respiration Rate (RR) is one of the important parameters used for monitoring of neonates in a Neonatal Intensive Care Unit (NICU). In this paper, we propose a contactless method of measuring RR using a camera. Our algorithm exploits the motion of the chest and abdomen during the breathing cycle of a neonate. The chest and abdomen regions will typically expand and contract during inspiration and expiration...
Network applications in highly mobile systems need to employ online algorithms that do not rely on precise predictions about future events. In order to meet hard performance guarantees in the presence of unknown future events, common practice is to add redundancy to the systems. In this paper, we define a new competitive ratio that reflects the amount of redundancy needed to ensure some given performance...
Content based image retrieval for remote sensing images is challenging research area in recent years. In this paper, the weighted image fusion algorithm of morphological feature circular covariance histogram (CCH) and local binary and tetra patterns (LBP and LTrP) is presented. These features are effective for defining the image texture content and the content of the image but has limitations in defining...
In this paper we present a novel framework for compressing images using saliency maps and KAZE features. The method involves adapting the quality factor in JPEG compression scheme for each block instead of using the same quality factor for the entire image. This is achieved by adapting JPEG quality parameter based on visual saliency and KAZE keypoints. Subsequently, a piecewise function is used to...
In this paper, we modeled the precoder feedback for interference channel as a combinatorial optimization problem. Conventionally, in limited feedback, chordal distance has been used to find the best precoder index from the codebook. But, the brute force approach on the problem shows that higher sumrates can be achieved with the same sized codebook, i.e, the same feedback bits. Thus, in this paper,...
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