نتایج جستجو برای: photographic process
تعداد نتایج: 1318675 فیلتر نتایج به سال:
................................................................................................................................. III ACKNOWLEDGMENTS .............................................................................................................. V TABLE OF CONTENTS ............................................................................................................... VI L...
Automatic segmentation of cortical vessels in pre- and post- tumor resection laser range scan images
Measurement of intra-operative cortical brain movement is necessary to drive mechanical models developed to predict sub-cortical shift. At our institution, this is done with a tracked laser range scanner. This device acquires both 3D range data and 2D photographic images. 3D cortical brain movement can be estimated if 2D photographic images acquired over time can be registered. Previously, we h...
Abs t rac t . In this paper, a new approach for retrieval from semistructured photographic collections is described. We have developed a retrieval model based on the Dempster-Shafer theory of evidence combination. Basic concepts of the Dempster-Shafer theory are explained and the suitability of this theory for information retrieval is explored. A retrieval model for a semi-structured photograph...
Digital photography is a relatively new topic for scholarly study in the area of computer mediated communication. Photographic technologies were only first computerized in the 1990s, but have rapidly supplanted older film technologies for a majority of professional uses. Digital photography has not simply substituted silicon chips for film, however, but has brought about rapid changes throughou...
OBJECTIVE The process of making slides for presentation of nuclear medicine data has historically used methods that require some photographic expertise. This paper describes the use of readily available software and hardware to achieve the same result. Surface images generated for SPECT images of a normal patient and a patient with Alzheimer's dementia were used to develop the technique describ...
By applying the principle that all stellar image profiles should be identical apart from a scale change, we can derive a relative calibration for a photographic plate without use of calibration spots or other indirect means.
In this demonstration, we present the Automatic Linguistic Indexing of Pictures (ALIP) system. The system annotates images with linguistic terms, chosen among hundreds of such terms. The system uses a wavelet-based approach for feature extraction, a statistical modeling process for training, and a statistical significance processor to annotate images. We implemented and tested our ALIP system o...
We look at how a seemingly small change in the photographic process—capturing a focal stack at the press of a button, instead of a single photo—can boost significantly the optical performance of a conventional camera. By generalizing the familiar photographic concepts of “depth of field” and “exposure time” to the case of focal stacks, we show that focal stack photography has two performance ad...
Mainly task of optimizing design of Industrial Photogrammetric Network with Variant Interior Elements (IPNVIE) is to provide a schema for a set of interior relatively problems in a photographic task. It includes: how to choose cameras, design measure marks, choose obtaining data schema, choose measurement method of image coordinates and schema of analytic process of photographic measurement, an...
A simple dark-field photographic technique was developed which enables laboratory personnel with minimal photographic training to easily record antigen-antibody patterns on immunodiffusion plates.
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