Title:
赤外線フィルタを逐次制御するための方法、及び該方法を実行するアセンブリ
Document Type and Number:
Japanese Patent JP6467028
Kind Code:
B2
Abstract:
A method for sequential control of a diaphragm arrangement of a camera having an image sensor and comprising a diaphragm arranged as an aperture stop and an integrated IR cut filter. The method comprises
- initiating closing or opening of the diaphragm having an initial aperture opening,
- detecting an amount of incident radiation when the diaphragm has the initial aperture opening,
- shifting the aperture opening of the diaphragm to an intermediate aperture opening in order to alter the ratio between visible light and infrared radiation passing the diaphragm, by means of:
- if closing of the diaphragm is initiated, performing a predetermined partial closing of an aperture of the diaphragm, or
- if opening of the diaphragm is initiated, performing a predetermined partial opening of the aperture of the diaphragm. The method further comprises detecting an amount of incident radiation following the shift of the aperture opening and
- calculating a composition of visual light and infrared radiation in the scene from the detected amounts of incident radiation and a calculated ratio between visible light and infrared radiation when having the initial aperture opening and the intermediate aperture opening, respectively, and
- shifting the aperture opening of the diaphragm to a new position if appropriate.
Inventors:
Lundberg, Stefan
Chelmström, Jonas
Chelmström, Jonas
Application Number:
JP2017245543A
Publication Date:
February 06, 2019
Filing Date:
December 21, 2017
Export Citation:
Assignee:
Axis Arb
International Classes:
G03B9/06; G03B7/08; G03B11/00; H04N5/225; H04N5/232; H04N5/238
Domestic Patent References:
| JP200678666A | ||||
| JP2002189238A | ||||
| JP5033932B2 |
Foreign References:
| US20020044212 |
Attorney, Agent or Firm:
Sonoda/Kobayashi Patent Business Corporation