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Registration techniques for image subtraction
Conference Proceedings '88., IEEE Southeastcon, 2003Image subtraction can be used to aid in detection of flaws in a manufactured product by subtracting the image of a perfect product from that of the sample under tests. For this technique to be successful, the two images must be precisely registered. Several registration techniques were applied to various images which had been subjected to translation ...
T.G. Cleaver, C.-L. Su
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A subtraction technique in conventional angiography.
Radiology, 1984A subtraction technique is described for conventional angiography by which a superimposed vessel can be removed, allowing exact visualization of the area in question. The method is easy, requires only standard subtraction apparatus, and obviates the need for additional contrast material injections.
S L, Schatz +3 more
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THE SUBTRACTION TECHNIQUE OF THERMOLUMINESCENT DATING
Archaeometry, 1973ABSTRACTSCombination of the routine approaches of thermoluminescence dating, the fine‐grain and inclusion methods, allows an age to be determined that is independent of knowledge of the environmental dose‐rate. This socalled subtraction technique is exampled by several terracottas of museum origin and some pottery collected from archaeological contexts
S. J. FLEMING, D. STONEHAM
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A simple noise subtraction technique
Review of Scientific Instruments, 2004Measuring very low level signals at low frequency is a tedious task, because environmental noise increases in this frequency domain and it is very difficult to filter it efficiently. In order to counteract these major problems, we propose a simple and generic noise subtraction technique, which mixes several features of traditional feedback techniques ...
F. Douarche +3 more
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Improvement of terahertz imaging with a dynamic subtraction technique
Applied Optics, 2000By use of dynamic subtraction it is feasible to adopt phase-sensitive detection with a CCD camera to reduce long-term optical background drift. We report on a two-order improvement of the signal-to-noise ratio. The improved system is used to image terahertz field distribution generated by an optically rectified electro-optic crystal with a modulation ...
Z, Jiang, X G, Xu, X C, Zhang
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Evaluation of background subtraction techniques for video surveillance
CVPR 2011, 2011Background subtraction is one of the key techniques for automatic video analysis, especially in the domain of video surveillance. Although its importance, evaluations of recent background subtraction methods with respect to the challenges of video surveillance suffer from various shortcomings.
Sebastian Brutzer +2 more
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Comparing Registration Techniques For Digital Subtraction Radiography
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992The study described in this paper presents a new imaging geometry based on the correspondence of 3D structures. It can be used to establish correspondence between pairs of clinical images taken at different proj ection angles and to produce reconstructed images comparable with images taken with mechanical devices.
Stanley M. Dunn +4 more
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A digital subtraction technique for dual isotope scintigraphy
Physics in Medicine & Biology, 1971A technique for the subtraction of one random pulse train from another is described. The technique uses digital methods and operates at count-rates up to 5000 per second. It is particularly suited to dual isotope investigations in nuclear medicine where techniques employing analogue methods may introduce errors because of inherent integrating time ...
J R, Kemplay, J A, Aspinall
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MP‐RAGE subtraction venography: A new technique
Journal of Magnetic Resonance Imaging, 1995AbstractPreliminary evaluation of a new magnetic resonance (MR) venography technique was performed with data sets from five patients undergoing BAR imaging of the brain before and after intravenous administration of gadopentetate dimeglumine. Before contrast agent injection, the patients were imaged with MP‐RAGE (magnetization‐prepared rapid gradient ...
J, Stevenson, E A, Knopp, A W, Litt
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Subtractive dithering technique for delta-sigma modulator
2017 IEEE International Symposium on Circuits and Systems (ISCAS), 2017This paper presents a novel subtractive dithering technique used in delta-sigma modulators which improves the spectral integrity of the modulators while minimizing the tradeoffs due to the use of dither. Dithering is commonly used in delta-sigma modulators to eliminate idle tones.
Zhichao Tan +3 more
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