Image sensing apparatus having automatic iris function of automatically adjusting exposure in response to video signal
CA 1309166 C · Owner: Takuma, Masao · Inventors: Haruki, Toshinobu; Kikuchi, Kenichi; Takuma, Masao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a video camera having an automatic iris function and a gamma correcting function, an object evaluating value is calculated based on an exposure evaluating value in a sampling area designated as a priority area a target, luminance level for exposure control is changed according to the relation between this object evaluating value and exposure evaluating values in sampling areas other than the sampling area selected as the priority area a ratio, with which the priority area is weighted in calculating the object evaluating value is changed and a correction, value for gamma correction is further changed. As a result, overexposure and underexposure in a picture are decreased. Furthermore, if …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 20, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 20, 2009.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.