Title :
Focusing criterion
Author :
Charfi, Malek ; Nyeck, A. ; Tosser, A.
Author_Institution :
ENIM Lab. de Mecatronique Ind., Metz, France
fDate :
7/4/1991 12:00:00 AM
Abstract :
A focusing criterion using the discrete cosine transform is described. This criterion may be used for improving an automatic focusing procedure with the aim of performing faster measurement and more objective collection of data in, for example, quality control and pattern recognition. The principle of this criterion and the set of used parameters are given. A discussion of several laboratory experiments is added to show the extended field of implementation of this criterion.
Keywords :
computerised picture processing; focusing; transforms; DCT; autofocusing criterion; automatic focusing procedure; discrete cosine transform; field of implementation; focusing control; focusing criterion; laboratory experiments; objective collection of data; performing faster measurement;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19910774
