Experimental Techniques

Experimental Techniques for Observing Dislocations

Experimental problems in the application of the BergBarrett Method to the observation of dislocations in metal single c r ystals a re dis c u ssed . The problem of background nois~ caused by fluorescense from the s pecimen and inelastic scattering is considered. A c r i t e rion for selecLing an appropria t e f ilte r to discriminate against the background CALT 4 7 322 noise is presented. The p...

Photographic Techniques in Experimental Hydraulics

Digital Techniques in Experimental Medicine

Color Doppler and intravenous angiography (digital technique) can widely be used in experimental medicine. Their wide clinical application, availability, simplicity and small cost impose their importance. Color Doppler analysis of the vascular activity of certain region is more precise than the classic intravenous angiography, but requires contact of highly sophisticated equipment with the expe...

Experimental Comparison of Correlation Techniques

This paper presents an experimental comparisons of different forms of SSD and normalised cross correlation of image neighborhoods. Signal detection theory is used as a framework for analysis of correlation techniques. A sum of squared difference (SSD) of two image neighborhoods is shown to provide an optimal matching measure for tracking and registration. Correlation of the image, its gradient ...

Optical imaging in medicine: I. Experimental techniques.

The overwhelming scatter which occurs when optical radiation propagates through tissue severely limits the ability to image internal structure using measurements of transmitted intensity. A broad range of methods has been proposed during the past decade or so in order to improve imaging performance. Direct methods involve isolating an unscattered or least-scattered component of transmitted scat...