Variogram-based method for contrast measurement.
We present a technique for determining the contrast of an intensity distribution in the presence of additive noise and other effects, such as undesired local amplitude or offset variations. The method is based on the variogram function. It just requires the measurement of the variogram at only four points and, as a consequence, it is very fast. The proposed technique is compared with other standard techniques, showing a reduction in the error of the contrast measurement.
Sanchez-Brea
Luis Miguel
LM
Department of Optics, Applied Optics Complutense Group, Universidad Complutense de Madrid, Facultad de Ciencias Físicas, Ciudad Universitaria s.n., 28040 Madrid, Spain. sanchezbrea@fis.ucm.es
Torcal-Milla
Francisco Jose
FJ
Bernabeu
Eusebio
E