FOCUSING CRITERION

被引:18
作者
CHARFI, M
NYECK, A
TOSSER, A
机构
[1] ENIM Laboratorie de Mecatronique Industrielle, Metz
关键词
TRANSFORMS; MATHEMATICAL TECHNIQUES; IMAGE PROCESSING;
D O I
10.1049/el:19910774
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
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.
引用
收藏
页码:1233 / 1235
页数:3
相关论文
共 9 条
[1]   DISCRETE COSINE TRANSFORM [J].
AHMED, N ;
NATARAJAN, T ;
RAO, KR .
IEEE TRANSACTIONS ON COMPUTERS, 1974, C 23 (01) :90-93
[2]  
Ahmed N., 1975, ORTHOGONAL TRANSFORM, P86
[3]  
CHEN WH, 1977, IEEE T COMMUN, V25, P1004, DOI 10.1109/TCOM.1977.1093941
[4]   PERCEPTUAL CODING IN THE COSINE TRANSFORM DOMAIN [J].
GRISWOLD, NC .
OPTICAL ENGINEERING, 1980, 19 (03) :306-311
[5]   IMAGE DATA-COMPRESSION - A REVIEW [J].
JAIN, AK .
PROCEEDINGS OF THE IEEE, 1981, 69 (03) :349-389
[6]  
LEE BG, 1984, IEEE T ACOUST SPEECH, V32, P1243
[7]  
Pratt W. K., 1978, DIGITAL IMAGE PROCES
[8]   SIMPLE FFT AND DCT ALGORITHMS WITH REDUCED NUMBER OF OPERATIONS [J].
VETTERLI, M ;
NUSSBAUMER, HJ .
SIGNAL PROCESSING, 1984, 6 (04) :267-278