This paper presents a novel hardware architecture using FPGA-based reconfigurable computing (RC) for accurate calculation of dense disparity maps in real-time, stereo-vision systems. Recent stereo-vision hardware solutions have proposed local-area approaches. Although parallelism can be easily exploited using local methods by replicating the window-based image elaborations, accuracy is limited ...

In this paper, we present an idea of using stereo matching to develop a travel aid for the blind. In this approach, images are segmented into several nonoverlapping homogeneous regions using a color segmentation algorithm. For each homogeneous region, a rectangular window, which is large enough to cover the region, is found. A local match with the found rectangular window size is then executed ...

daylight in classrooms is a critical factor in school design, in terms of its impact on students’ health, learning and visual performance. providing adequate amount of evenly distributed daylight and glare prevention are important challenges in classroom design. window configuration significantly affects the intensity and uniformity of daylight. this paper aims to investigate the effect of wind...

abstract creating suitable classrooms that can meet the educational needs of mentally-retarded students is vitally important. the present study explores the effect of three physical characteristics of classroom environment on the creativity of educable mentally-retarded children: window view, window size, and classroom size. the participants, one hundred 9-to-11-year-old girl students, took the...

In stereovision, the use of frequency domain methods raises the problems of the choice of a family of filters and a strategy to use it. This paper compares three families : Gabor filters, finite prolate spheroidal sequences and Weng's Windowed Fourier of Gaussian (WFG). Then a comparison between two strategies is done : an image-based choice of filters and the use of a "complete" subset of filt...

Local search algorithms, such as simulated annealing, tabu search, and local hill climbers attempt to optimize a solution to a problem by making locally improving modifications to a candidate solution. They rely on a neighborhood operator to restrict the search to a typically small set of possible successor states. The genetic algorithm mutation operator, likewise, enables the exploration of th...

Background: This work investigated the dosimetry limitations of the random and systematic uncertainties of sliding window (SW) intensity modulated radiation therapy (IMRT). Materials and Methods: A Varian 21EX linear accelerator, Pinnacle3 treatment planning system and radiographic film dosimetry was used. The limitations of the SW were studied using beam modulation ranging from 2 to 10...

We present a new, efJicient stereo algorithm addressing robust disparity estimation in the presence of occlusions. The algorithm is an adaptive, multi-window scheme using left-right consistency to compute disparity and its associated uncertainty. We demonstrate and discuss performances with both synthetic and real stereo pairs, and show how our results improve on those of closely related techni...

1 . Introduction 2 . Iterative restoration algorithms 2. 1 . Adaptive regularized iterative algorithms 2.2. Application to adaptive image restoration 2.3. Combined iterative algorithms 2.4. Comparison based on the computational load 3. Computation o the weight matrices 3. 1 . Masking and noise visibility functions 3.2. Computation of the masking function 3.2. 1 . Weighted window 3.2.2. Fixed wi...

This paper presents a fast center weighted rank order filtering algorithm with logarithmic worst case time complexity with respect to the window size. The method is based on a data structure, called an unbalanced “double heap” which naturally supports partition of the window samples into two different “heaps”, greater and smaller than the rth sample. The algorithm is designed for any window siz...