نتایج جستجو برای: down approaches are approximately implemented by three algorithms 1 chessboard segmentation
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introduction: nowadays virtual colonoscopy has become a reliable and efficient method of detecting primary stages of colon cancer such as polyp detection. one of the most important and crucial stages of virtual colonoscopy is colon segmentation because an incorrect segmentation may lead to a misdiagnosis. materials and methods: in this work, a hybrid method based on geometric deformable models...
Rectified images are needed for proper depth map estimation. In our solution, we used chessboard calibration pattern and corners extraction algorithms. First step was to capture independent sequences for each camera and find chessboard corners coordinates. Coordinates obtained from every sequence was averaged to eliminate noise influence. Then intrinsic matrices (I) and distortion parameters (D...
This paper describes theoretical and practical aspects of an alternative efficient chessboard representation based on 4-bit piece coding technique. There are two main approaches used by the majority of computer chess programs: arrays and bitboards. However, after the years of researching and experimenting in chess engine Axon and its parallel version Achilles, we would like to introduce an alte...
the purpose of this thesis was to investigate how differently metacognitive, cognitive, and social/affective strategies affect l2 learners’ reading comprehension. to this end, the study employed a quasi-experimental design with a placement test as a proficiency test to find the homogeneity of groups. three classes were randomly selected as the experimental groups (n =90), and each class was tau...
This paper presents simple and novel feature extraction approaches for segmenting continuous Bangla speech sentences into words/sub-words. These methods are based on two simple speech features, namely the time-domain features and the frequency-domain features. The time-domain features, such as short-time signal energy, short-time average zero crossing rate and the frequency-domain features, suc...
This paper details a method to take an image of a chess board and output a reconstructed computer representation of the board through board and piece recognition. Though techniques for board recognition have been thoroughly explored in the past, especially in relation to chessboard calibration, previous works on piece recognition often focus on non-robust segmentation procedures that rely heavi...
Melancholic depression is a biologically homogeneous clinical entity in which structural brain alterations have been described. Interestingly, reports of structural alterations in melancholia include volume increases in Cerebro-Spinal Fluid (CSF) spaces. However, there are no previous reports of CSF volume alterations using automated whole-brain voxel-wise approaches, as tissue classification a...
0167-8191/$ see front matter 2008 Elsevier B.V doi:10.1016/j.parco.2008.10.003 * Tel.: +886 2 28013131x6774; fax: +886 2 2801 E-mail address: [email protected] The block-based medial axis transform (BB_MAT, for short) of a 3D (2D) binary image, denoted 3D_BB_MAT (2D_BB_MAT), is defined as the problem to find a minimal set of upright 1-cubes (1-squares) whose union corresponds exactly to th...
Texture image analysis is one of the most important working realms of image processing in medical sciences and industry. Up to present, different approaches have been proposed for segmentation of texture images. In this paper, we offered unsupervised texture image segmentation based on Markov Random Field (MRF) model. First, we used Gabor filter with different parameters’ (frequency, orientatio...
The VESSEL12 (VESsel SEgmentation in the Lung) challenge objectively compares the performance of different algorithms to identify vessels in thoracic computed tomography (CT) scans. Vessel segmentation is fundamental in computer aided processing of data generated by 3D imaging modalities. As manual vessel segmentation is prohibitively time consuming, any real world application requires some for...
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