Snímek 5134
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| původní | zesvětlený | barevně kódovaný
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a ještě s vloženou mřížkou s údaji:
(údaj uprostřed políček mřížky je medián surových hodnot
zelených pixelů, údaj dole je jas políčka
dělený jednou kandelou na metr čtvereční).
# Date/Time : 2006:02:24 20:14:18
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5134.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 0.002 s (1/400)
# Aperture : f/2.8
# ISO equiv. : 200
# Selected image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 0.133
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -69 -70 -16.3 -9.10 -14.6 -11.6
10 -36 -33 -34 -35 -8.28 -4.45 -7.30 -5.79
50 0 0 0 0 0.00 0.00 0.00 0.00
90 36 33 34 34 8.28 4.45 7.09 5.79
99 72 68 69 70 16.6 9.10 14.6 11.7
100 16241 16269 16276 16277 3.73E3 2.16E3 3.40E3 2.71E3
# flux from 0.654*0.49 sr ( 8.59E-7 sr/4px) is 0.0143 lx ( 0.0416 lx tilewise);
# tilewise luminance 0.0150 cd/m2 with rel. SD 4.49E3 % (summing pixels below 15850 and with non-zero green: there is 48.8 % of them)
# Fuji Devignetting: 1 # dark frame dark/5119.pgm subtracted from all values
# Red average= 0.4 minimum= -147 maximum=16241 over 15850: 3 zero: 46.3 %
# GrUp average= 0.1 minimum= -156 maximum=16269 over 15850: 8 zero: 52.1 %
# GrDw average= 0.5 minimum= -149 maximum=16276 over 15850: 7 zero: 50.3 %
# Blue average= 0.3 minimum= -148 maximum=16277 over 15850: 4 zero: 48.7 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5119.pgm -nh -nt -i 5134.txt -t 118 -s71:76 pgm/5134.pgm
Just points with luminances over 25 and below 1.0E3 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 20:14:18
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5134.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 0.002 s (1/400)
# Aperture : f/2.8
# ISO equiv. : 200
# Selected image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 0.133
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -69 -70 -16.3 -9.10 -14.6 -11.6
10 -36 -33 -34 -35 -8.28 -4.45 -7.30 -5.79
50 0 0 0 0 0.00 0.00 0.00 0.00
90 36 33 34 34 8.28 4.45 7.09 5.79
99 72 68 69 70 16.6 9.10 14.6 11.7
100 16277 16277 16277 16277 3.74E3 2.16E3 3.40E3 2.71E3
# flux from 8.30E-5 sr ( 8.59E-7 sr/4px) is 0.00947 lx (points with luminances over 25 and below 1.0E3 )
# Fuji Devignetting: 1 # dark frame dark/5119.pgm subtracted from all values
# Red average=1150.0 minimum= -118 maximum=16241 over 15850: 766008
# GrUp average= 825.8 minimum= -125 maximum=16269 over 15850: 766013
# GrDw average=1014.2 minimum= -112 maximum=16276 over 15850: 766012
# Blue average=1277.9 minimum= -133 maximum=16277 over 15850: 766009 zero: 1.9 %
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5119.pgm -sm100 -nh -L25 -U1000 -i 5134.txt -e 5134.eps -n 5134.ppm -t 118 -s71:76 pgm/5134.pgm
Logaritmická škála jasů (jednotkou je kandela na metr čtvereční,
nazývaná též nit) – intenzity osvětlení sněhu v luxech dostanete
vynásobením jasu v nitech koeficientem 3,6. U intenzit osvětlení
lesní stěny je takový koeficient 20 až 40.