نتایج جستجو برای: digital image

تعداد نتایج: 646919  

Journal: :desert 0
h.r. keshtkar msc. graduate, university of tehran, karaj, iran h. azarnivand professor, faculty of natural resources, university of tehran, karaj, iran h. arzani professor, faculty of natural resources, university of tehran, karaj, iran s.k. alavipanah professor, faculty of geography, university of tehran, tehran, iran f. mellati instructor, faculty of environment and natural resources, ferdowsi university, mashhad, iran

land cover is one of basic data layers in geographic information system for physical planning and environmentalmonitoring. digital image classification is generally performed to produce land cover maps from remote sensing data,particularly for large areas. in the present study the multispectral image from irs liss-iii image along with ancillary datasuch as vegetation indices, principal componen...

Journal: :journal of electrical and computer engineering innovations 0
vafa maihami department of electrical and computer engineering, semnan university, semnan, iran farzin yaghmaee department of electrical and computer engineering, semnan university, semnan, iran

with quick development of digital images and the availability of imaging tools, massive amounts of images are created. therefore, efficient management and suitable retrieval, especially by computers, is one of themost challenging fields in image processing. automatic image annotation (aia) or refers to attaching words, keywords or comments to an image or to a selected part of it. in this paper,...

Journal: :journal of dentomaxillofacil radiology, pathology and surgery 0
maryam paknahad oral radiology department, dental school, shiraz university of medical sciences, shiraz, iran. mahvash hasani oral radiology department, dental school, shiraz university of medical sciences, shiraz, iran. mahsa hasani medical school, shiraz university of medical sciences, shiraz, iran. alireza evazpour dental school, shiraz university of medical sciences, shiraz, iran.

introdouction: the aim of the present study was to investigate image magnification in digital panoramic radiography and assess the effect of anatomical sites on the magnification in both males and females. materials and methods: in this retrospective study, digital panoramic radiographs of 48 patients with 202 implants were investigated. implant diameter and length were measured on panoramic ra...

Journal: :International Journal for Numerical Methods in Engineering 2015

Journal: :iranian journal of fuzzy systems 2014
p. moallem n. razmjooy b. s. mousavi

potato image segmentation is an important part of image-based potato defect detection. this paper presents a robust potato color image segmentation through a combination of a fuzzy rule based system, an image thresholding based on genetic algorithm (ga) optimization and morphological operators. the proposed potato color image segmentation is robust against variation of background, distance and ...

Digital Breast Tomosynthesis (DBT) is a technology that creates three dimensional (3D) images of breast tissue. Tomosynthesis mammography detects lesions that are not detectable with other imaging systems. If image reconstruction time is in the order of seconds, we can use Tomosynthesis systems to perform Tomosynthesis-guided Interventional procedures. This research has been designed to study u...

Journal: :journal of computer and robotics 0
farzad zargari multimedia systems research group, it research institute, iran telecom research center, tehran, iran ali mosleh department of computer engineering, science & research branch, islamic azad university, tehran, iran

one of the challenging issues in managing the existing large digital image libraries and databases is content based image retrieval (cbir). the accuracy of image retrieval methods in cbir is subject to effective extraction of image features such as color, texture, and shape. in this paper, we propose a new image retrieval method using contourlet transform coefficients to index texture of the im...

2000
Hyuncheol Park Kwangjo Kim

--Many watermarking methods for protecting the intellectual property right and authenticating multimedia data have been proposed in recent years. It is possible to guarantee the authenticity of data using readable and fragile watermarking. In this paper, we propose a visible watermarking technique using verifiable digital seal image that is based on the concept of fragile watermarking. Seal ima...

Journal: :desert 2013
h.r. keshtkar h. azarnivand h. arzani s.k. alavipanah f. mellati

land cover is one of basic data layers in geographic information system for physical planning and environmentalmonitoring. digital image classification is generally performed to produce land cover maps from remote sensing data,particularly for large areas. in the present study the multispectral image from irs liss-iii image along with ancillary datasuch as vegetation indices, principal componen...

Journal: :Advanced Information Systems 2021

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