Title:
撮像装置
Document Type and Number:
Japanese Patent JP6995510
Kind Code:
B2
Abstract:
To provide an imaging device that can reduce time required for luminance convergence, and, even when illuminance of a subject changes, quickly follow a change.SOLUTION: An imaging device comprises a video signal control unit 10 that acquires current brightness information from a picked-up image output from an image sensor 1 and adjusts exposure through feedback control, and the video signal control unit 10 includes: a PGA control unit 2 that amplifies RGB signals of an image frame output from the image sensor 1; a luminance statistic acquisition unit 3 that acquires the brightness information from the output signals; a ratio calculation unit 4a that calculates a ratio between the acquired brightness information and a preset luminance target value; a correction amount calculation unit 4b that predicts an amount of displacement to the luminance target value from the calculated ratio, and derives correction amounts of a shutter speed of imaging means and the gain value of amplification means; and an exposure control unit 4c that adjusts exposure through feedback control with the derived shutter speed and gain value.SELECTED DRAWING: Figure 1
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Inventors:
Chatani Tsuyoshi
Application Number:
JP2017128766A
Publication Date:
January 14, 2022
Filing Date:
June 30, 2017
Export Citation:
Assignee:
Aiphone Co., Ltd.
International Classes:
H04N5/235; G03B7/091; H04N5/243
Domestic Patent References:
| JP2005148309A | ||||
| JP2017112462A |
Foreign References:
| US6836288 |
Attorney, Agent or Firm:
Kyoichi Ueda