Title:
リセット及び平均信号値による適応的ＸＤＲ
Document Type and Number:
Japanese Patent JP6966798
Kind Code:
B2
Abstract:
Dynamic range of a photosensor is controlled dynamically improving image detail especially in dark and bright areas of the image. At least one reset threshold and one reset value are set. At the end of the frame integration the value of the average pixel and the value of the brightest pixel that was not reset are determined and, based on that, at least one of the reset threshold and the reset value are changed. The change may reduce/increase the reset threshold such that more/less pixels are being reset, may reduce/increase the reset value thereby causing the pixels to be reset to a lower/higher value, or change the timing of the reset. In some embodiments, a calculated value for the reset threshold and the reset value are averaged with calculated values of prior N frames, and the result is applied to the next frame.
Inventors:
Chieu, Simeon Su-min
Wilk, Emil Abraham
Wilk, Emil Abraham
Application Number:
JP2019504748A
Publication Date:
November 17, 2021
Filing Date:
July 28, 2017
Export Citation:
Assignee:
Intevac Inc.
International Classes:
H04N5/355; H04N5/374
Domestic Patent References:
| JP2007180811A | ||||
| JP2006014277A | ||||
| JP2005110236A | ||||
| JP2003259234A |
Foreign References:
| WO2006103880A1 |
Attorney, Agent or Firm:
Iseki Katsumori
Shuhei Kaneko
Wataru Onishi
Shuhei Kaneko
Wataru Onishi
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