JPH01309872A - Method for determining reference brightness level - Google Patents

Method for determining reference brightness level

Info

Publication number
JPH01309872A
JPH01309872A JP13996888A JP13996888A JPH01309872A JP H01309872 A JPH01309872 A JP H01309872A JP 13996888 A JP13996888 A JP 13996888A JP 13996888 A JP13996888 A JP 13996888A JP H01309872 A JPH01309872 A JP H01309872A
Authority
JP
Japan
Prior art keywords
brightness level
grade crossing
rail portions
measuring
illuminance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13996888A
Inventor
Hisashi Kurosaki
Junya Toda
Original Assignee
Nippon Signal Co Ltd:The
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Signal Co Ltd:The filed Critical Nippon Signal Co Ltd:The
Priority to JP13996888A priority Critical patent/JPH01309872A/en
Publication of JPH01309872A publication Critical patent/JPH01309872A/en
Application status is Pending legal-status Critical

Links

Abstract

PURPOSE: To easily determine a proper reference brightness level used at the time of detecting an obstacle on a grade crossing road by measuring the brightness level of the rail portions of the grade crossing road in no shielded condition while correcting dispersion in illuminance as necessary.
CONSTITUTION: A TV camera is installed in a position for overlooking a grade crossing road C to project the rail portions R on the grade crossing C while storing the picture image for each defined time. The brightness levels in a plurality of measuring areas 24 are measured based on the frame picture image after the opening of the grade crossing, while examining the brightness level of a plurality of judging areas 22. After correcting each illuminance dispersion, it is judged whether the differences in mutual brightness levels are above a defined threshold value. When the judged result is negative, judgment is formed that rail portions R are not shielded by a shielding object A while measuring the brightness level of the rail portions R. After that, the illuminance dispersion of this brightness level is corrected to determine a reference brightness level.
COPYRIGHT: (C)1989,JPO&Japio
JP13996888A 1988-06-07 1988-06-07 Method for determining reference brightness level Pending JPH01309872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13996888A JPH01309872A (en) 1988-06-07 1988-06-07 Method for determining reference brightness level

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13996888A JPH01309872A (en) 1988-06-07 1988-06-07 Method for determining reference brightness level

Publications (1)

Publication Number Publication Date
JPH01309872A true JPH01309872A (en) 1989-12-14

Family

ID=15257860

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13996888A Pending JPH01309872A (en) 1988-06-07 1988-06-07 Method for determining reference brightness level

Country Status (1)

Country Link
JP (1) JPH01309872A (en)

Cited By (16)

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JP2007310096A (en) * 2006-05-17 2007-11-29 Sharp Corp Video display apparatus, and display brightness control method therefor
US8523781B2 (en) 2009-10-15 2013-09-03 Masimo Corporation Bidirectional physiological information display
US8690799B2 (en) 2009-10-15 2014-04-08 Masimo Corporation Acoustic respiratory monitoring sensor having multiple sensing elements
US8870792B2 (en) 2009-10-15 2014-10-28 Masimo Corporation Physiological acoustic monitoring system
US9028429B2 (en) 2008-12-30 2015-05-12 Masimo Corporation Acoustic sensor assembly
US9066680B1 (en) 2009-10-15 2015-06-30 Masimo Corporation System for determining confidence in respiratory rate measurements
US9106038B2 (en) 2009-10-15 2015-08-11 Masimo Corporation Pulse oximetry system with low noise cable hub
US9107625B2 (en) 2008-05-05 2015-08-18 Masimo Corporation Pulse oximetry system with electrical decoupling circuitry
US9192351B1 (en) 2011-07-22 2015-11-24 Masimo Corporation Acoustic respiratory monitoring sensor with probe-off detection
US9307928B1 (en) 2010-03-30 2016-04-12 Masimo Corporation Plethysmographic respiration processor
US9386961B2 (en) 2009-10-15 2016-07-12 Masimo Corporation Physiological acoustic monitoring system
US9724016B1 (en) 2009-10-16 2017-08-08 Masimo Corp. Respiration processor
US9782110B2 (en) 2010-06-02 2017-10-10 Masimo Corporation Opticoustic sensor
US9955937B2 (en) 2012-09-20 2018-05-01 Masimo Corporation Acoustic patient sensor coupler
US10357209B2 (en) 2017-06-06 2019-07-23 Masimo Corporation Bidirectional physiological information display

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007532156A (en) * 2004-04-08 2007-11-15 マシモ コーポレーションMasimo Corporation Respiration rate, non-invasive monitoring of heart rate, and apnea
JP2007310096A (en) * 2006-05-17 2007-11-29 Sharp Corp Video display apparatus, and display brightness control method therefor
US9107625B2 (en) 2008-05-05 2015-08-18 Masimo Corporation Pulse oximetry system with electrical decoupling circuitry
US9028429B2 (en) 2008-12-30 2015-05-12 Masimo Corporation Acoustic sensor assembly
US9131917B2 (en) 2008-12-30 2015-09-15 Masimo Corporation Acoustic sensor assembly
US9795358B2 (en) 2008-12-30 2017-10-24 Masimo Corporation Acoustic sensor assembly
US8870792B2 (en) 2009-10-15 2014-10-28 Masimo Corporation Physiological acoustic monitoring system
US9066680B1 (en) 2009-10-15 2015-06-30 Masimo Corporation System for determining confidence in respiratory rate measurements
US9106038B2 (en) 2009-10-15 2015-08-11 Masimo Corporation Pulse oximetry system with low noise cable hub
US8790268B2 (en) 2009-10-15 2014-07-29 Masimo Corporation Bidirectional physiological information display
US8690799B2 (en) 2009-10-15 2014-04-08 Masimo Corporation Acoustic respiratory monitoring sensor having multiple sensing elements
US10349895B2 (en) 2009-10-15 2019-07-16 Masimo Corporation Acoustic respiratory monitoring sensor having multiple sensing elements
US10098610B2 (en) 2009-10-15 2018-10-16 Masimo Corporation Physiological acoustic monitoring system
US9370335B2 (en) 2009-10-15 2016-06-21 Masimo Corporation Physiological acoustic monitoring system
US8523781B2 (en) 2009-10-15 2013-09-03 Masimo Corporation Bidirectional physiological information display
US9538980B2 (en) 2009-10-15 2017-01-10 Masimo Corporation Acoustic respiratory monitoring sensor having multiple sensing elements
US9668703B2 (en) 2009-10-15 2017-06-06 Masimo Corporation Bidirectional physiological information display
US9877686B2 (en) 2009-10-15 2018-01-30 Masimo Corporation System for determining confidence in respiratory rate measurements
US9867578B2 (en) 2009-10-15 2018-01-16 Masimo Corporation Physiological acoustic monitoring system
US9386961B2 (en) 2009-10-15 2016-07-12 Masimo Corporation Physiological acoustic monitoring system
US9848800B1 (en) 2009-10-16 2017-12-26 Masimo Corporation Respiratory pause detector
US9724016B1 (en) 2009-10-16 2017-08-08 Masimo Corp. Respiration processor
US10098550B2 (en) 2010-03-30 2018-10-16 Masimo Corporation Plethysmographic respiration rate detection
US9307928B1 (en) 2010-03-30 2016-04-12 Masimo Corporation Plethysmographic respiration processor
US9782110B2 (en) 2010-06-02 2017-10-10 Masimo Corporation Opticoustic sensor
US9192351B1 (en) 2011-07-22 2015-11-24 Masimo Corporation Acoustic respiratory monitoring sensor with probe-off detection
US9955937B2 (en) 2012-09-20 2018-05-01 Masimo Corporation Acoustic patient sensor coupler
US10357209B2 (en) 2017-06-06 2019-07-23 Masimo Corporation Bidirectional physiological information display

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