نتایج جستجو برای: photographic
تعداد نتایج: 7218 فیلتر نتایج به سال:
Photographic systems created on the basis of “core-shell” microcrystals are successfully used in scientific and practical purposes, since advantages, which such systems have allow to vary their properties over a wide range. However in the majority of cases “core-shell” systems are used as surface photosensitive microcrystals. Researches of an internal photosensitivity is connected to a number o...
(Extended photo media series ; 2) On cover: The history and practice of photographic printing, 1840-1895. Preface Silverprinting has been often doomed, but it still survives. The Albumen and Salted Paper Book is a book about the major photographic printing processes in use during the years 1840-1895, approximately the first half-century of photographic history. These first 50 years of photograp...
Purpose The aim of this paper is to demonstrate fundamental photographic techniques and standardized views in oculoplastic disease and surgery outside of a photographic studio. Methods A Canon EOS 60D digital single lens reflex (DSLR) camera, which was fitted with a Canon EF-S 60 mm USM macro lens, was used to photograph the subject. A Canon MR-14EX Macro Ringlite was used to illuminate the sub...
The purpose of our study is to introduce a new method for depth of field blur simulation used for compositing real and synthetic images in a realistic way. Existing methods do not simulate accurately the depth of field blur produced by photographic equipment. The problem is twofold: photometric and geometric. Existing methods based on convolution do not produce a realistic photometric rendering...
We presume that the reader understands conventional radiography in which photographic methods capture radiographic images. Typically, a patient is positioned between an x-ray source and a film/screen cassette. The cassette contains an intensifying screen which, when exposed to radiation, emits light which exposes a photographic emulsion. The photographic film can be developed to provide an imag...
We present a semi-parametric approach to photographic image synthesis from semantic layouts. The approach combines the complementary strengths of parametric and nonparametric techniques. The nonparametric component is a memory bank of image segments constructed from a training set of images. Given a novel semantic layout at test time, the memory bank is used to retrieve photographic references ...
Tone reproduction algorithms attempt to compress a large range of pixel values into a smaller range that is suitable for display on devices with limited dynamic range. A recently proposed tone reproduction operator achieved this goal by emulating photographic practice. Like in photography, the manual tuning of a small set of intuitive parameters was required. In this paper we extend this photog...
Standardization of photography in plastic surgery is fundamental for pre-operative surgical planning, comparative post-operative assessment, and demonstration of surgical results.1 In rhinoplasty, slight changes in patient or camera position can lessen nasal hump, vary nose size, and alter skin tension.2 In order to prevent these common errors, photographic standardization with high-quality equ...
With the development of computer graphic techniques and smaller visual difference between photographic images (PG) and computer graphics (CG), splicing of computer graphics and photographic is becoming more common, which causes the need for automatically distinguishing computer generated images from real photographs. Based on several visual features that derived from color, texture and shape fe...
BACKGROUND To assess the ability of fluorescence imaging to detect a dose response relationship between fluorosis severity and different levels of fluoride in water supplies compared to remote photographic scoring in selected populations participating in an observational, epidemiological survey in Chiang Mai, Thailand. METHODS Subjects were male and female lifetime residents aged 8-13 years. ...
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