نتایج جستجو برای: digital image storage

تعداد نتایج: 815722  

2012
Suresh Kumar H. Mangalam Howard Cheng William Stallings M. V. K. Satti Ibrahim Sogukpinar Rafael Gonzalez Richard Woods Albertus Joko Santoso Gede Bayu Suparta

As data is exchanged quickly in electronic way, information security plays a vital role in transmission and storage. Digital images are widely used in industrial purpose, so it is necessary to protect image from unauthorized access. Quasi group encryption is used to encrypt the grayscale image to provide security during transmission. Computer images are extremely data intensive and hence requir...

2013
VASCAN OREST WEINGART MIRCEA

The bandwidth reduction or storage lowering in digital image transmission confers to the image compression a key role. In this paper, we propose a new approach for lossy image compression: the source image is vector quantized by applying Self-Organizing Map (SOM) with several dictionaries. Each dictionary is originally designed based on the feature vectors resulted after applying the Walsh-Hada...

2003
Vitaliy Fadeyev Carl Haber

Audio information stored in the undulations of grooves in a medium such as a phonograph record may be reconstructed, with no or minimal contact, by measuring the groove shape using precision metrology methods and digital image processing. The effects of damage, wear, and contamination may be compensated, in many cases, through image processing and analysis methods. The speed and data handling c...

Journal: :CoRR 2010
J. Anitha S. Immanuel Alex Pandian

Digital watermarking technique has been presented and widely researched to solve some important issues in the digital world, such as copyright protection, copy protection and content authentication. Several robust watermarking schemes based on vector quantization (VQ) have been presented. In this paper, we present a new digital image watermarking method based on SOFM vector quantizer for color ...

2000
N. H. MAERZ

Aggregate size and shape measurements are increasingly becoming important issues in the mining, comminution, materials handling, and construction industries. Screening or sieving methods, today’s standard method of sizing stone materials, are simply too inefficient for some applications, excessively time consuming and costly for others, and do not provide enough data for yet other applications....

2000
Jon Y. Hardeberg

To achieve high image quality throughout a digital imaging system, the first requirement is to ensure the quality of the device that captures real-world physical images to digital images, for example a desktop scanner. Several factors have influence on this quality: optical resolution, bit depth, spectral sensitivities, and acquisition noise, to mention a few. In this study we focus on the colo...

ژورنال: مجله دندانپزشکی 2005
, سلطانی محمدآبادی, مهدی , عزالدینی اردکانی, فاطمه , گودرزی‌پور, داریوش ,

Background and Aim: Proper shaping and cleaning of the root canal system is one of the most important aspects of endodontic treatment. To estimate the canal length before instrumentation in endodontic treatment, traditionally, conventional radiographic techniques and recently Direct Digital Radiography (DDR) are applied. The application of computer technology to radiography has allowed less exp...

Journal: :international journal of civil engineering 0
jui-chao kuo national cheng-kung university, tainan 701, taiwan teng-yi kuo national cheng-kung university, tainan 701, taiwan cheng-han wu national cheng-kung university, tainan 701, taiwan shih-heng tung national university of kaohsiung, kaohsiung 811, taiwan ming-hsiang shih national chi nan university, nan-tou 545, taiwan wen-pei sung national chin-yi university of technology, taichung 411, taiwan

in this study digital image correlation (dic) technique combined with a high speed video system was used to predict movement of particles in a water model. comparing with particle-image velocimetry (piv) technique, it provides a low cost alternative approach to visualize flow fields and was successfully employed to predict the movement of particles in a water model at different submergence dept...

Journal: :Journal of the American College of Radiology : JACR 2006
Mark B Williams Martin J Yaffe Andrew D A Maidment Melissa C Martin J Anthony Seibert Etta D Pisano

This paper on digital mammography image acquisition is 1 of 3 papers written as part of an intersociety effort to establish image quality standards for digital mammography. The information included in this paper is intended to support the development of an ACR guideline on image quality for digital mammography. The topics of the other 2 papers are digital mammography image display and digital m...

1994
Gregory W. Cook Edward J. Delp

The problem inherent with any digital image (or digital video) system is the large amount of bandwidth required for transmission or storage. This has driven the research area of image compression to develop more complex algorithms that compress images to lower data rates with better fidelity. One approach that can be used to increase the execution speed of these complex algorithms is through th...

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