发明名称 |
METHOD AND DEVICE FOR AUTOMATIC FOCUSING IN IMAGE CLAMPING SYSTEM USING SYMMETRICAL FINITE IMPULSE RESPONSE FILTERS |
摘要 |
FIELD: digital image shaping; automatic focusing in image clamping systems. SUBSTANCE: image area of interest and color plane of interest are chosen; area of interest is filtered off to shape filtered-off section; absolute mean value for filtered-off section and maximal absolute mean value are evaluated; absolute mean value for filtered-off section is checked for exceeding value in percent of maximal absolute mean value; optimal focal length equal to image clamping focal length is set in case absolute mean value for filtered-off section is higher than maximal absolute mean value; optimal focal length is yielded in case absolute mean value for filtered-off section is not over value in percent of maximal absolute mean value. EFFECT: enhanced speed and precision of automatic focusing for image clamping. 17 cl, 11 dwg |
申请公布号 |
RU2222113(C2) |
申请公布日期 |
2004.01.20 |
申请号 |
RU20020107312 |
申请日期 |
2000.08.11 |
申请人 |
|
发明人 |
TAN JAP-PENG;TOMAS BRENT;AKKHARIA TINKU |
分类号 |
G03B13/36;G02B7/28;H04N1/56;H04N5/232 |
主分类号 |
G03B13/36 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|