Snímek 5300
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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 21:04:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5300.pgm)
# Focal length : 40.5mm (35mm equivalent: 274mm)
# CCD width : 5.32mm
# Exposure time: 0.033 s (1/30)
# 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)* 0.0130
# % R G1 G2 B readings R G B L / cd/m2
1 -68 -64 -63 -66 -1.53 -0.827 -1.35 -1.07
10 -31 -27 -27 -30 -0.698 -0.351 -0.613 -0.473
50 1 2 2 0 0.0225 0.0260 0.00 0.0248
90 72 85 86 70 1.62 1.11 1.43 1.29
99 1035 1657 1657 942 23.3 21.6 19.3 22.2
100 15869 15866 15866 15867 357 207 324 259
# flux from 0.0130*0.63 sr ( 1.70E-8 sr/4px) is 0.0124 lx ( 0.0138 lx tilewise);
# tilewise luminance 0.929 cd/m2 with rel. SD 296 % (summing pixels below 15850 and with non-zero green: there is 63.0 % of them)
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average= 69.5 minimum= -154 maximum=15869 over 15850: 8 zero: 35.3 %
# GrUp average= 113.8 minimum= -153 maximum=15866 over 15850: 22 zero: 37.4 %
# GrDw average= 112.6 minimum= -147 maximum=15866 over 15850: 21 zero: 36.6 %
# Blue average= 65.8 minimum= -143 maximum=15867 over 15850: 2 zero: 37.5 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5276.pgm -nh -nt -i 5300.txt -t 118 -s71:76 pgm/5300.pgm
Just points with luminances over 2.0 and below 60 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 21:04:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5300.pgm)
# Focal length : 40.5mm (35mm equivalent: 274mm)
# CCD width : 5.32mm
# Exposure time: 0.033 s (1/30)
# 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)* 0.0130
# % R G1 G2 B readings R G B L / cd/m2
1 -68 -64 -63 -66 -1.53 -0.827 -1.35 -1.07
10 -31 -27 -27 -30 -0.698 -0.351 -0.613 -0.473
50 1 2 2 0 0.0225 0.0260 0.00 0.0248
90 72 85 86 70 1.62 1.11 1.43 1.29
99 1035 1658 1657 942 23.3 21.6 19.3 22.2
100 15869 15869 15869 15867 357 207 324 259
# flux from 0.00101 sr ( 1.70E-8 sr/4px) is 0.0109 lx (points with luminances over 2.0 and below 60 )
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average= 513.7 minimum= -133 maximum=15869 over 15850: 706800
# GrUp average= 811.4 minimum= -133 maximum=15866 over 15850: 706814
# GrDw average= 811.2 minimum= -139 maximum=15866 over 15850: 706813
# Blue average= 464.9 minimum= -143 maximum=15867 over 15850: 706794
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5276.pgm -sm100 -nh -L2 -U60 -i 5300.txt -e 5300.eps -n 5300.ppm -t 118 -s71:76 pgm/5300.pgm
Just points with luminances below 2.0 and with non-zero green: there is 59.9 % of them cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 21:04:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5300.pgm)
# Focal length : 40.5mm (35mm equivalent: 274mm)
# CCD width : 5.32mm
# Exposure time: 0.033 s (1/30)
# 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)* 0.0130
# % R G1 G2 B readings R G B L / cd/m2
1 -68 -64 -63 -66 -1.53 -0.827 -1.35 -1.07
10 -31 -27 -27 -30 -0.698 -0.351 -0.613 -0.473
50 1 2 2 0 0.0225 0.0260 0.00 0.0248
90 72 85 86 70 1.62 1.11 1.43 1.29
99 1035 1657 1657 942 23.3 21.6 19.3 22.2
100 15869 15866 15866 15867 357 207 324 259
# flux from 0.0120*0.60 sr ( 1.70E-8 sr/4px) is 0.00131 lx ( 0.00201 lx tilewise);
# tilewise luminance 0.209 cd/m2 with rel. SD 160 % (points with luminances below 2.0 and with non-zero green: there is 59.9 % of them)
# Fuji Devignetting: 2 # dark frame dark/5276.pgm subtracted from all values
# Red average= 8.5 minimum= -154 maximum=15869 out of range: 59412 zero: 38.3 %
# GrUp average= 14.0 minimum= -153 maximum=15866 out of range: 59426 zero: 40.6 %
# GrDw average= 14.0 minimum= -147 maximum=15866 out of range: 59425 zero: 39.7 %
# Blue average= 9.0 minimum= -143 maximum=15867 out of range: 59406 zero: 40.7 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -ft -d dark/5276.pgm -sm100 -nh -U2 -i 5300.txt -e 5300.eps -n 5300.ppm -t 118 -s71:76 pgm/5300.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.
