Snímek 5267
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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 : 2006:02:26 20:01:06
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5267.pgm)
# Focal length : 19.2mm (35mm equivalent: 130mm)
# CCD width : 5.32mm
# Exposure time: 0.008 s (1/125)
# Aperture : f/3.2
# ISO equiv. : 200
# Selected image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 0.0542
# % R G1 G2 B readings R G B L / cd/m2
1 -70 -67 -67 -68 -6.57 -3.63 -5.79 -4.66
10 -35 -32 -32 -34 -3.28 -1.74 -2.90 -2.28
50 0 0 0 0 0.00 0.00 0.00 0.00
90 35 32 33 34 3.28 1.76 2.90 2.30
99 71 67 68 70 6.66 3.66 5.96 4.71
100 15869 15856 15866 15867 1.49E3 860 1.35E3 1.08E3
# flux from 0.0580*0.49 sr ( 7.57E-8 sr/4px) is 0.00169 lx ( 0.00398 lx tilewise);
# tilewise luminance 0.0595 cd/m2 with rel. SD 491 % (summing pixels below 15850 and with non-zero green: there is 49.2 % of them)
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average= 0.8 minimum= -154 maximum=15869 over 15850: 8 zero: 45.9 %
# GrUp average= 0.9 minimum= -140 maximum=15856 over 15850: 8 zero: 51.7 %
# GrDw average= 1.4 minimum= -147 maximum=15866 over 15850: 16 zero: 49.9 %
# Blue average= 1.0 minimum= -143 maximum=15867 over 15850: 5 zero: 48.2 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5276.pgm -nh -nt -i 5267.txt -t 118 -s71:76 pgm/5267.pgm
Just points with luminances over 40 and below 60 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 20:01:06
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5267.pgm)
# Focal length : 19.2mm (35mm equivalent: 130mm)
# CCD width : 5.32mm
# Exposure time: 0.008 s (1/125)
# Aperture : f/3.2
# ISO equiv. : 200
# Selected image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 0.0542
# % R G1 G2 B readings R G B L / cd/m2
1 -70 -67 -67 -68 -6.57 -3.63 -5.79 -4.66
10 -35 -32 -32 -34 -3.28 -1.74 -2.90 -2.28
50 0 0 0 0 0.00 0.00 0.00 0.00
90 35 32 33 34 3.28 1.76 2.90 2.30
99 71 67 68 70 6.66 3.66 5.96 4.71
100 15869 15856 15866 15867 1.49E3 860 1.35E3 1.08E3
# flux from 1.14E-6 sr ( 7.57E-8 sr/4px) is 5.58E-5 lx (points with luminances over 40 and below 60 )
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average=2595.7 minimum= -154 maximum=15869 over 15850: 766082
# GrUp average=4512.5 minimum= -121 maximum=15856 over 15850: 766082
# GrDw average=1173.2 minimum= -142 maximum=15866 over 15850: 766090
# Blue average=3105.2 minimum= -119 maximum=15867 over 15850: 766079
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5276.pgm -sm100 -nh -L40 -U60 -i 5267.txt -e 5267.eps -n 5267.ppm -t 118 -s71:76 pgm/5267.pgm
Just points with luminances over 60 and below 5.0E2 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 20:01:06
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5267.pgm)
# Focal length : 19.2mm (35mm equivalent: 130mm)
# CCD width : 5.32mm
# Exposure time: 0.008 s (1/125)
# Aperture : f/3.2
# ISO equiv. : 200
# Selected image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 0.0542
# % R G1 G2 B readings R G B L / cd/m2
1 -70 -67 -67 -68 -6.57 -3.63 -5.79 -4.66
10 -35 -32 -32 -34 -3.28 -1.74 -2.90 -2.28
50 0 0 0 0 0.00 0.00 0.00 0.00
90 35 32 33 34 3.28 1.76 2.90 2.30
99 71 67 68 70 6.66 3.66 5.96 4.71
100 15869 15856 15866 15867 1.49E3 860 1.35E3 1.08E3
# flux from 2.80E-6 sr ( 7.57E-8 sr/4px) is 4.82E-4 lx (points with luminances over 60 and below 5.0E2 )
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average=2666.1 minimum= -154 maximum=15869 over 15850: 766060
# GrUp average=4563.1 minimum= -121 maximum=15856 over 15850: 766060
# GrDw average=2988.4 minimum= -142 maximum=15866 over 15850: 766068
# Blue average=2892.5 minimum= -119 maximum=15867 over 15850: 766057
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5276.pgm -sm100 -nh -L60 -U500 -i 5267.txt -e 5267.eps -n 5267.ppm -t 118 -s71:76 pgm/5267.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.
