نتایج جستجو برای: image dewarping

تعداد نتایج: 376780  

Journal: :journal of advances in computer research 0

one of the most fundamental features of digital image and the basic steps in image processing, analysis, pattern recognition and computer vision is the edge of an image where the preciseness and reliability of its results will affect directly on the comprehension machine system made objective world. several edge detectors have been developed in the past decades, although no single edge detector...

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...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تهران 1378

عملیات تناظریابی عکسی (image matching) در تولید مدل رقومی زمین (dtm) همواره با مشکلات و تنگناهایی مواجه بوده است . برای حل مسئله تناظریابی، الگوریتمها و روشهای متنوعی پیشنهاد گردیده است اما عواملی از قبیل شیب سطوح شیء، اختلاف در موقعیت و حالات دوربین در دو لحظه عکسبرداری، شرایط روشنایی، انعکاس و ... تا حد قابل توجهی شباهت دو عکس را مخدوش می نماید بطوریکه دستیابی به نقاط متناظر را دچار اشکال می ...

2005
S. Krueger T. Schaeffter S. Weiss K. Nehrke T. Rozijn P. Boernert

S. Krueger, T. Schaeffter, S. Weiss, K. Nehrke, T. Rozijn, P. Boernert Philips Research, Hamburg, Germany, Philips Medical Systems, Best, Netherlands Objective: Motion is one of the most prominent problems for many time-consuming MR imaging procedures. For instance, head motion during 3D scans or functional studies can cause image artifacts or deteriorate the spatial resolution of activation pa...

Image fusion is a method for obtaining a highly informative image by merging the relative information of an object obtained from two or more image sources of the same scene. The satellite cameras give a single band panchromatic (PAN) image with high spatial information and multispectral (MS) image with more spectral information. The problem exists today is either PAN or MS image is available fr...

ژورنال: محاسبات نرم 2017

Image zooming is one of the existing issues discussed in image processing in which the person is interested in enlarging a certain picture and fitting it into the visible area of the display devices. In zooming activities it is necessary that extra pixels be inserted in the information image. The addition of the image data should be suitable with the texture of the image without producing artif...

Journal: :emergency journal 0
cover image

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Image segmentation is an essential and critical process in image processing and pattern recognition. In this paper we proposed a textured-based method to segment an input image into regions. In our method an entropy-based textured map of image is extracted, followed by an histogram equalization step to discriminate different regions. Then with the aim of eliminating unnecessary details and achi...

پایان نامه :دانشگاه تربیت معلم - تهران - دانشکده فنی 1393

a problem of computer vision applications is to detect regions of interest under dif- ferent imaging conditions. the state-of-the-art maximally stable extremal regions (mser) detects affine covariant regions by applying all possible thresholds on the input image, and through three main steps including: 1) making a component tree of extremal regions’ evolution (enumeration), 2) obtaining region ...

Purpose: This paper presents various  image indexing techniques and discusses their advantages and limitations.             Methodology: conducting a review of the literature review, it identifies three main image indexing techniques, namely concept-based image indexing, content-based image indexing and folksonomy. It then describes each technique. Findings: Concept-based image indexing is te...

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