نتایج جستجو برای: color photography

تعداد نتایج: 137782  

ژورنال: مجله دندانپزشکی 2006
سیادت, حکیمه , میرفضائلیان, علی ,

Object photography in dentistry including dental instruments, models, teeth and gross specimens has some special features and needs special onsideration. These objects are usualy very small, highly usually reflective and often with very bright surfaces. They need special lighting and other accessories for acceptable results. On the other hand, in laboratories and dental clinics we haven't enoug...

Journal: :Indonesian Journal of Electrical Engineering and Computer Science 2023

The structure of the retinal blood vessels can be obtained by segmenting fundus images. A image gained through color photography or fluorescein angiography (FA). produced camera cause noise which reduce quality image. To noise, this research uses non-local means filter (NLMF). For texture analysis, study Gabor filters due to frequencies as same human visual system. process vessel is performed u...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده مهندسی شیمی 1393

هدف از این تحقیق بررسی کارایی فرایند الکتروفنتون و بهینه سازی پارامترهای موثر بر فرایند به کمک طراحی آماری به منظور تصفیه پساب شرکت پتروشیمی شازند میباشد.در این تحقیق تاثیر پارامترهای : زمان واکنش ، چگالی جریان، ph پساب ، نسبت (?ml h?_2 o_2)/( lit pw) و نسبت مولی (mol h_2 o_2)/(mol fe^(2+) ) بر حذف cod و color از پساب پتروشیمی تحت فرایند الکتروفنتون( با الکترود های آهن و آلومینیوم به طور جداگان...

Journal: :Computers in biology and medicine 2017
Panagiota Spyridonos Georgios Gaitanis Aristidis Likas Ioannis D. Bassukas

BACKGROUND AND OBJECTIVE Actinic keratoses (AK) are common premalignant skin lesions that can progress to invasive skin squamous cell carcinoma (sSCC). The subtle accumulation of multiple AK in aging individuals increases the risk of sSCC development, and this underscores the need for efficient treatment and patient follow-up. Our objectives were to develop a method based on color texture analy...

Journal: :Applied sciences 2023

Tsavorite’s color is not only affected by its internal components, but also external factors. This paper studies the neutral grey background and cutting on impact color. Under a 6504K fluorescent lamp, changing Munsell gray backgrounds from N9.5 to N3, we discovered that was best for tsavorite grading. In this paper, feasibility of taking photography studied. The regression models R2 between ph...

Journal: :مجله دندانپزشکی 0
علی میرفضائلیان a. mirfazaelian حکیمه سیادت h. siadat

dentistry has always benefited from photography as an adjunct tool in diagnosis treatment planning and presentations. the main reason for taking dental photographs is to provide documents and supplements for treatment. a photograph facilitates communication between dentists and laboratories. quality control will become more important to dental practice in near future and photographs can be used...

2003
Jaume Pujol Francisco Martínez-Verdú Pascual Capilla

Using a spectroradiometric model of capture for a digital camera based on the mathematical description of the empirical opto-electronic conversion spectral functions (OECSF), the capture of MacAdam or optimal spectra with fixed illumination level is simulated. This model of capture allows to change freely the f-number of the zoom-lens and/or the photosite integration time of the electronic shut...

2007
Luiz Velho Jonas Sossai

The use of attribute maps for 3D surfaces is an important issue in Geometric Modeling, Visualization and Simulation. Attribute maps describe various properties of a surface that are necessary in applications. In the case of visual properties, such as color, they are also called texture maps. Usually, the attribute representation exploits a parametrization g : U ⊂ R → R of a surface in order to ...

2006
Jonas Sossai Luiz Velho

The use of attribute maps for 3D surfaces is an important issue in Geometric Modeling, Visualization and Simulation. Attribute maps describe various properties of a surface that are necessary in applications. In the case of visual properties, such as color, they are also called texture maps. Usually, the attribute representation exploits a parametrization g : U ⊂ R → R of a surface in order to ...

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