发明名称 |
Auto-iris method and apparatus for imaging device |
摘要 |
An auto-iris method for an imaging device includes the steps of obtaining a first signal indicating brightness of an object from a signal output from an imaging element; comparing a level of the first signal with a level of a reference signal; and enhancing a level of the reference signal more as the object becomes brighter and controlling an iris to path more quantity of light to the imaging element, based on the compared result.
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申请公布号 |
US5315394(A) |
申请公布日期 |
1994.05.24 |
申请号 |
US19910754398 |
申请日期 |
1991.09.03 |
申请人 |
HITACHI, LTD.;HITACHI VIDEO & INFORMATION SYSTEM, INC. |
发明人 |
KURASHIGE, TOMOYUKI;IMAIDE, TAKUYA;TARUMIZU, HIROYUKI |
分类号 |
H04N5/235;H04N5/238;(IPC1-7):H04N5/225 |
主分类号 |
H04N5/235 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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