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This paper presents hardware constraints analysis of Gabor filtering operation for its hardware implementation in a real time Facial Expression Recognition System (FERS). Gabor filter is the most common feature extractor employed for the realization of such system. Feature extraction using Gabor filter is efficient and has better discrimination capability. In this work, we have employed software-based...
Image enhancement is one of the most important pre-processing step used in a number of Computer Vision applications. Its importance can be judged by a number of image enhancement algorithms, which have been developed over the time for different applications. All these algorithms differ from one another in terms of processing speed, computational complexity, and quality of image and so on. Therefore,...
In this work, we present a dedicated hardware implementation of exponential function computation unit using CORDIC (Coordinate Rotation Digital Computer) algorithm for extended range of input arguments. Hardware architecture design is done keeping in view its possible integration in the hardware implementation of the Radial Basis Function (RBF) based Support Vector Machine (SVM) classifier. The designed...
In this paper, we present VLSI architecture of Pairwise Linear Support Vector Machine (SVM) classifier for multi-classification on FPGA. The objective of this work is to facilitate real time classification of the facial expressions into three categories: neutral, happy and pain, which could be used in a typical patient monitoring system. Thus, the challenge here is to achieve good performance without...
In today's world of automation, real time face detection with high performance is becoming necessary for a wide number of computer vision and image processing applications. Existing software based system for face detection uses the state of the art Viola and Jones face detection framework. This detector makes use of image scaling approach to detect faces of different dimensions and thus, performance...
An accurate, hardware efficient and fast image rescaling unit is a crucial part of any real-time image processing system. Although there are a number of image scaling algorithms existing in the literature but Bicubic and Bilinear interpolation algorithms are most widely used. In the recent years, numerous algorithms have been proposed that aim to bridge the gap between these two standard algorithms,...
This paper presents the design of a dedicated VLSI architecture for focused region extraction in a video sequence and its implementation on Virtex-5 (ML510) FPGA platform. Edge width based scheme is used for focused region extraction. The proposed architecture is designed to meet the real-time requirements of video surveillance applications. It is capable of robustly extracting the focused regions...
Tracking of objects of interest is of great significance for video based automated surveillance systems. This research presents the design and implementation of Xilinx ML510 (Virtex-5 FXT) FPGA platform based vision system for real-time object tracking in a video sequence. Modified particle filtering and sum of absolute differences (SAD) based scheme is used for object tracking. The proposed complete...
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