نتایج جستجو برای: tooth segmentation

تعداد نتایج: 155381  

Journal: :journal of artificial intelligence in electrical engineering 2014
roya abdollahi

we first describe how to “fuzzify” the estimated binary columns to create a [0,1]-valued column. werefer to this [0,1] -valued column as the soft segmentation column of the noisy spectrogram column.similarly to the collection of soft segmentation columns as the soft segmentation image, or simply asthe soft segmentation. the band-dependent posterior probability that the hard segmentation columnv...

Journal: :iranian journal of medical physics 0
fereshteh yousefi rizi master of science in biomedical engineering, department of biomedical systems & medical physics, tehran university of medical sciences alireza ahmadian associate professor in biomedical engineering, biomedical systems & medical physics dept., tehran university of medical sciences & research center for science and technology in medicine, tehran, iran. emad fatemizadeh assistant professor in biomedical engineering, electrical engineering dept., sharif university of technology, tehran, iran. javad alirezaie associate professor in biomedical engineering, electrical engineering dept., ryerson university, toronto, canada. nader rezaie assistant professor, pneumologist consultant, iran university of medical sciences, internal medicine group, tehran, iran.

introduction: virtual bronchoscopy is a reliable and efficient diagnostic method for primary symptoms of lung cancer. the segmentation of airways from ct images is a critical step for numerous virtual bronchoscopy applications. materials and methods: to overcome the limitations of the fuzzy connectedness method, the proposed technique, called fuzzy connectivity - fuzzy c-mean (fc-fcm), utilized...

Journal: :Multimedia Tools and Applications 2022

Individual tooth segmentation and identification from cone-beam computed tomography images are preoperative prerequisites for orthodontic treatments. Instance methods using convolutional neural networks have demonstrated ground-breaking results on individual tasks, used in various medical imaging applications. While point-based detection achieve superior dental images, it is still a challenging...

The reconstruction of the information contaminated by cloud and cloud shadow is an important step in pre-processing of high-resolution satellite images. The cloud and cloud shadow automatic segmentation could be the first step in the process of reconstructing the information contaminated by cloud and cloud shadow. This stage is a remarkable challenge due to the relatively inefficient performanc...

Journal: :journal of advances in computer research 2013
marzieh azarian reza javidan mashallah abbasi dezfuli

texture image analysis is one of the most important working realms of imageprocessing in medical sciences and industry. up to present, different approacheshave been proposed for segmentation of texture images. in this paper, we offeredunsupervised texture image segmentation based on markov random field (mrf)model. first, we used gabor filter with different parameters’ (frequency,orientation) va...

Ali Broumandnia, Jamshid Shanbehzadeh

This paper presents, a hybrid method, low-resolution and high-resolution, for Persian page segmentation. In the low-resolution page segmentation, a pyramidal image structure is constructed for multiscale analysis and segments document image to a set of regions. By high-resolution page segmentation, by connected components analysis, each region is segmented to homogeneous regions and identifyi...

Journal: :پژوهش های جغرافیای طبیعی 0
سیدمهدی پورباقر کردی مربی دانشگاه پیام نور و دانشجوی دکتری تخصصی ژئومورفولوژی، دانشگاه خوارزمی عزت الله قنواتی دانشیار گروه ژئومورفولوژی، دانشکدة علوم جغرافیا، دانشگاه خوارزمی امیر کرم دانشیار گروه ژئومورفولوژی، دانشکدة علوم جغرافیا، دانشگاه خوارزمی امیر صفاری دانشیار گروه ژئومورفولوژی، دانشکدة علوم جغرافیا، دانشگاه خوارزمی

introduction this research addresses the automatic extraction of alluvial fans using four methods of segmentation from satellite data. this segmentation method divides images into partitions. it is typically used to recognize objects or other relevant purposes in digital images (fu, 2013:3260). alluvial fans have always been a landform that attracts human because they are suitable areas for liv...

Journal: :World Journal Of Advanced Research and Reviews 2023

Tooth loss is one of the most common oral health problems, and may affect mastication, phonetics, aesthetics, quality life. Dental implant placement an effective procedure to replace tooth loss. techniques using freehand surgery procedures increase potential failure related position, angle, depth insertion with 6.42% prevalence. The accuracy installing dental implants through protocol depends o...

Marzieh Azarian, Mashallah Abbasi Dezfuli Reza Javidan,

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...

Alireza Ahmadian, Emad FatemiZadeh Fereshteh Yousefi Rizi Javad Alirezaie Nader Rezaie

Introduction: Virtual bronchoscopy is a reliable and efficient diagnostic method for primary symptoms of lung cancer. The segmentation of airways from CT images is a critical step for numerous virtual bronchoscopy applications. Materials and Methods: To overcome the limitations of the fuzzy connectedness method, the proposed technique, called fuzzy connectivity - fuzzy C-mean (FC-FCM), utilized...

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