Title:
LINE SENSOR SENSITIVITY CORRECTION DEVICE, LINE SENSOR SENSITIVITY CORRECTION METHOD, AND LINE SENSOR SENSITIVITY CORRECTION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/234954
Kind Code:
A1
Abstract:
According to the present invention, a difference in sensitivity characteristics of a line sensor for each pixel is estimated from an image captured by the line sensor, and the difference in sensitivity characteristics is corrected. A line sensor sensitivity correction device 10 comprises: a line image accumulating/connecting unit 101 which accumulates a plurality of line images continuously captured under the same image-capturing condition while moving a line image capturing unit 18 relatively, and creates a plurality of connected images in which the plurality of accumulated line images are connected in a moving direction; a sensitivity characteristic analysis unit 102 which calculates, on the basis of the pixel values of each of the plurality of connected images created, an average pixel value, that is a distribution of the average value of the pixel values of each line image, corresponding to each pixel of the line image capturing unit 18, and which calculates correction sensitivity characteristic data including a noise level function and a low-frequency component and a high-frequency component of the average pixel value obtained from the calculated average pixel value; and a pixel value correction unit 103 which corrects the pixel value of each pixel of the connected image to be corrected, by using the calculated correction sensitivity characteristic data.
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Inventors:
KATAOKA KAORI (JP)
SAGATA ATSUSHI (JP)
ANDO SHINGO (JP)
UMEDA TAKAYUKI (JP)
SAGATA ATSUSHI (JP)
ANDO SHINGO (JP)
UMEDA TAKAYUKI (JP)
Application Number:
PCT/JP2019/019864
Publication Date:
November 26, 2020
Filing Date:
May 20, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04N1/191; G06T1/00; H04N1/409
Foreign References:
| JP2009285329A | 2009-12-10 | |||
| JP2009034413A | 2009-02-19 | |||
| JP2003150954A | 2003-05-23 | |||
| JP2009100302A | 2009-05-07 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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