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An introduction to digital image processing
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The article was published on 1986-01-01 and is currently open access. It has received 1745 citations till now. The article focuses on the topics: Digital image processing & Image processing.read more
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Journal ArticleDOI
Vector directional filters-a new class of multichannel image processing filters
TL;DR: It is shown that VDF can achieve very good filtering results for various noise source models, and provides a link between single-channel image processing and multichannel image processing where both the direction and the magnitude of the image vectors play an important role in the resulting image.
Book
Character Recognition Systems: A Guide for Students and Practitioners
TL;DR: This chapter discusses the development of Character Recognition, Evolution and Development, and some of the techniques used to achieve this goal, including Bayes Decision Theory, as well as some new methods based onributed graph matching.
Proceedings ArticleDOI
Image parsing: unifying segmentation, detection, and recognition
TL;DR: A general framework for parsing images into regions and objects, which makes use of bottom-up proposals combined with top-down generative models using the data driven Markov chain Monte Carlo algorithm, which is guaranteed to converge to the optimal estimate asymptotically.
Guidelines for radioelement mapping using gamma ray spectrometry data
J. P. Nicolet,G. Erdi Krausz +1 more
Abstract: FOREWORD Gamma rays are the most penetrating radiation from natural and man-made sources, and gamma ray spectrometry is a powerful tool for the monitoring and assessment of the radiation environment. Gamma ray surveys are carried out from aircraft, field vehicles, on foot, in boreholes, on the sea bottom and in laboratories. Ground and airborne gamma ray measurements cover large areas of the earth's surface, and many national and regional radiometric maps have been compiled and published. Standardized maps of terrestrial radiation and radioelement concentrations can be compared and regionally unified, showing general regional trends in radionuclide distribution and making the radiological assessment of the environment possible. Radiometric surveys and maps are applicable in several fields of science. They retain their geological and geophysical information for mineral prospecting, geochemical mapping and structural geology, and enable the comparison of geological features over large regions. Although the gamma ray method was originally developed for geoscience, it has also been successfully applied in emergency situations for mapping the contamination from nuclear fallout and for the location of lost radioactive sources. The use of modern computer data processing has enabled the introduction of new interpretation methods and the achievement of greater reliability in solving geological and environmental problems. The purpose and scope of this report is to introduce the theoretical background of gamma ray spectrometry in its application to the radiation environment, and to emphasize and illustrate new procedures in this field based on current knowledge. The report introduces the principles of radioactivity, contemporary radiation units, and the fundamentals of gamma ray spectrometry and its application to airborne, ground, car-borne, borehole and laboratory measurements. Examples of the use of gamma ray spectrometry in environmental studies and geological mapping illustrate the conditions, requirements and procedures for data acquisition, processing and reporting using this method. For many years the International Atomic Energy Agency (IAEA) has been involved in the treatment of exploration data and their multiple applications related to mineral exploration, agricultural, and environmental assessment. Recognizing that techniques and methods are rapidly progressing in this field, the IAEA invited a group of specialists to write a comprehensive report on radioelement mapping using gamma ray spectrometry. The authors of this publication are known and recognized specialists from four countries involved in mapping and data treatment using spectrometry. They all have extensive experience in the application and use of gamma ray spectrometry for radioelement mapping. This TECDOC is one …
Journal ArticleDOI
Hyperspectral imaging of hemoglobin saturation in tumor microvasculature and tumor hypoxia development
TL;DR: Hyperspectral imaging is used to create image maps of hemoglobin saturation, and classify image pixels where RFP alone is present (tumor cells), or both RFP and GFP are present (hypoxic tumor cells), and in vivo results are shown.
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Survey over image thresholding techniques and quantitative performance evaluation
Mehmet Sezgin,Bulent Sankur +1 more