This di ec o y con ains 10 sp eadshee s wi h he calib a ion da a o 10 AS7343 13-channel
colo senso s om AMS-Os am. Each shee uses wo calib a ion me hods, e e ed o as:
Mul i- a iable Linea Reg ession (MLR) and Selec i e Channel Elimina ion (SCE). Bo h
me hods a e applied o ob ain he coe icien s ha would allow he measu emen o he m-
EDI pa ame e h ough he weigh ed sum o he eadings om each senso ’s channels.
The esul s ob ained ha e been used as supplemen a y ma e ial o he expe imen al
alida ion o he me hodology p oposed in he a icle i led:
“m-EDI Measu emen Using Low-Cos Spec ome ic Senso s Based on Pho odiode A ays
wi h Na owband Colo Fil e s: An Explo a ion o Al e na i e Calib a ion Me hods.”
The inpu da a used in each sp eadshee include he spec al dis ibu ion o 21 ligh sou ces
along wi h he eadings ob ained by he senso s o be calib a ed o each o hese sou ces.
O he 21 illuminan s used, 14 we e used o senso calib a ion and 7 o e i ying he
esul ing fi .
The es bench used o ob ain he inpu da a allowed simul aneous applica ion o he same
ligh le el and spec um o bo h he senso being calib a ed and an Ocean Op ics HR2000
spec ome e used as a e e ence de ice.
All sp eadshee s sha e he same s uc u e and unc ionali y. Below is a desc ip ion o he
con en s and pu pose o each ab in he sp eadshee s:
Senso _ eadings
A he op o his ab, di ec eadings om each senso channel (COUNTS) o he 21
illuminan s a e included. A he bo om, he spec al dis ibu ion o each ligh sou ce is
p o ided, measu ed in mW/nm/m², anging om 380 o 900 nm in 1 nm inc emen s.
Based on he di ec senso eadings (COUNTS), no malized eadings (BASIC COUNTS) a e
calcula ed acco ding o he senso manu ac u e 's ins uc ions o minimize he influence
o in eg a ion ime and gain se ings.
To balance he e o weigh o each illuminan when applying he MLR o SCE algo i hms,
and hus educe he impac o le el di e ences be ween illuminan s, a scaling ac o is
applied o bo h he BASIC COUNTS and he spec al powe dis ibu ion. This scaling ac o
ensu es ha he eadings o all illuminan s ha e he same oo sum o squa es alue ac oss
channels.
SPD_illuminan s
This ab displays he illuminan spec a a e applying he scaling ac o men ioned abo e.
Linea _ eg ession
A he op o his ab, he da a o which he MLR calib a ion me hod is applied a e shown.
The coe icien s ob ained using his me hod a e displayed a he bo om, along wi h he
es ima ion e o o he m-EDI o bo h he calib a ion and es illuminan s.
SSR_quasi_no maliza ion
This ab shows he p ocedu e o calcula ing he coe icien s o be applied o each
channel’s spec al esponse (QN-coe ) o ensu e ha he maximum alue o he esponse
is simila ac oss all channels. This p ocedu e is e e ed o as Senso -spec al- esponse
quasi-no maliza ion.
Selec i e_channel_elimina ion
This ab con ains he calcula ions ela ed o he applica ion o he SCE me hod. On he le
side, he esul s o each i e a ion a e shown as new channels a e added o he coe icien
calcula ion. Below each i e a ion’s esul s, a cell indica es “Accep ” i he newly added
channel did no esul in anomalous coe icien alues, and “Disca d” o he wise.
On he igh side o he ab, di e en combina ions o channel addi ion o de a e included,
along wi h a able compa ing he coe icien s ob ained using he MLR and SCE me hods,
and a compa ison o esul s o he 21 illuminan s used in he es s.
