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In this paper, we propose a fast graph cut (GC) algorithm for disparity estimation. Two accelerating techniques are suggested: one is the early termination rule, and the other is prioritizing the α-β swap pair search order. Our simulations show that the proposed fast GC algorithm outperforms the original GC scheme by 210% in the average computation time while its disparity estimation quality is almost...
In this paper, we propose a Mixed Signal Parallel Multi 1Dimensional Block Matching Algorithm (MSPM-1D-BMA) based motion estimation (ME) processor. In contrast to the typical 2Dimensional full search block matching algorithm (2DFSBMA), the MSPM-1D-BMA based ME processor will greatly reduce the number of data movements in between memories. We employ a voting algorithm in the proposed ME processor to...
Spacetime stereo is a promising technique for accurate 3D reconstruction based on randomly varying illumination and temporal integration of the stereo matching cost. In this paper we show that the standard spacetime stereo approach can be improved in terms of accuracy of disparity estimation and convergence speed by adoption of suitable matching algorithms based on adaptive support windows. We also...
Baseline detection is an essential preprocessing step for many OCR systems, it has a direct effect on the efficiency and reliability of characters segmentation and features extraction stages, which contribute strongly to yielding higher recognition accuracy. For Arabic handwritten, the conventional methods which extract baseline as straight line are ill-suited because some Arabic words may be contracted...
Skew detection and correction is an important step in automated content conversion systems, on which overall system performance is dependent. Although there are many working solutions at the present time, the search for an algorithm that can achieve good error rates in a fast running time and on different layout types is still open, so new solutions for skew detection are needed. The paper at hand...
DBC (Differential Box-Counting) has been proved the least complex and the most convenient way to calculate the fractal dimension of images. However, for images with low resolution, the existence of empty boxes will influence the accuracy of fractal dimension. In order to reduce its effect, a new approach ADBC (Actual Differential Box-counting) is proposed in this paper. First, the empty boxes are...
Autonomous landing is an important part of the autonomous control of unmanned aerial vehicles (UAVs). In this article we present the design and implementation of a vision algorithm for autonomous landing. We use an onboard camera to obtain the image of the ground where the landing target (landmark) is laid and a method based on Zernike moments will be responsible for the target detection and recognition...
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