Snímek 5126
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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 19:46:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5126.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 2.000 s
# 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)* 1.66E-4
# % R G1 G2 B readings R G B L / cd/m2
1 -69 -64 -66 -68 -0.0198 -0.0108 -0.0177 -0.0140
10 -33 -28 -29 -32 -0.00948 -0.00473 -0.00834 -0.00640
50 1 2 3 0 2.87E-4 4.15E-4 0.00 3.70E-4
90 48 48 49 46 0.0138 0.00806 0.0120 0.0101
99 84 84 85 82 0.0241 0.0140 0.0214 0.0176
100 2145 3966 4859 2982 0.616 0.733 0.778 0.692
# flux from 0.654*0.66 sr ( 8.59E-7 sr/4px) is 9.92E-4 lx ( 0.00161 lx tilewise);
# tilewise luminance 0.00260 cd/m2 with rel. SD 16.4 % (summing pixels below 15850 and with non-zero green: there is 66.3 % of them)
# Fuji Devignetting: 1 # dark frame dark/5128.pgm subtracted from all values
# Red average= 9.6 minimum= -156 maximum= 2145 over 15850: 0 zero: 32.9 %
# GrUp average= 12.9 minimum= -163 maximum= 3966 over 15850: 0 zero: 33.9 %
# GrDw average= 12.8 minimum= -146 maximum= 4859 over 15850: 0 zero: 33.4 %
# Blue average= 9.1 minimum= -149 maximum= 2982 over 15850: 0 zero: 35.7 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5128.pgm -nh -nt -i 5126.txt -t 118 -s71:76 pgm/5126.pgm
Just points with luminances over 0.020 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 19:46:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5126.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 2.000 s
# Aperture : f/2.8
# ISO equiv. : 200
# Image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 1.66E-4
# % R G1 G2 B readings R G B L / cd/m2
1 -69 -64 -66 -68 -0.020 -0.011 -0.018 -0.0140
10 -33 -28 -29 -32 -0.0095 -0.0047 -0.0083 -0.00640
50 1 2 3 0 2.9E-4 4.2E-4 0.0 3.70E-4
90 48 48 49 46 0.014 0.0081 0.012 0.0101
99 84 84 85 82 0.024 0.014 0.021 0.0176
100 4859 4859 4859 2982 1.4 0.81 0.78 1.01
# flux from 9.44E-5 sr ( 8.59E-7 sr/4px) is 4.74E-6 lx (points with luminances over 0.020 )
# Fuji Devignetting: 1 # dark frame dark/5128.pgm subtracted from all values
# Red average= 163.1 minimum= -138 maximum= 2145 over 15850: 766001
# GrUp average= 309.9 minimum= -130 maximum= 3966 over 15850: 766001 zero: 4.5 %
# GrDw average= 325.9 minimum= -137 maximum= 4859 over 15850: 766001 zero: 1.8 %
# Blue average= 235.1 minimum= -137 maximum= 2982 over 15850: 766001 zero: 18.7 %
End of results of "raw2lum" (version 1.19) with parameters:
-c fuji -ft -d dark/5128.pgm -sm100 -nh -L0.02 -i 5126.txt -e 5126.eps -n 5126.ppm -t 118 -s71:76 pgm/5126.pgm
Just points with luminances over 0.010 and below 1.0E3 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 19:46:19
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5126.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 2.000 s
# Aperture : f/2.8
# ISO equiv. : 200
# Image percentils L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 1.66E-4
# % R G1 G2 B readings R G B L / cd/m2
1 -69 -64 -66 -68 -0.020 -0.011 -0.018 -0.0140
10 -33 -28 -29 -32 -0.0095 -0.0047 -0.0083 -0.00640
50 1 2 3 0 2.9E-4 4.2E-4 0.0 3.70E-4
90 48 48 49 46 0.014 0.0081 0.012 0.0101
99 84 84 85 82 0.024 0.014 0.021 0.0176
100 2145 3580 4859 910 0.62 0.70 0.24 0.671
# flux from 0.0142 sr ( 8.59E-7 sr/4px) is 1.58E-4 lx (points with luminances over 0.010 and below 1.0E3 )
# Fuji Devignetting: 1 # dark frame dark/5128.pgm subtracted from all values
# Red average= 71.4 minimum= -156 maximum= 2145 over 15850: 749451
# GrUp average= 42.8 minimum= -163 maximum= 3966 over 15850: 749451 zero: 15.5 %
# GrDw average= 45.7 minimum= -146 maximum= 4859 over 15850: 749451 zero: 11.4 %
# Blue average= 5.9 minimum= -149 maximum= 2982 over 15850: 749451 zero: 38.4 %
End of results of "raw2lum" (version 1.19) with parameters:
-c fuji -ft -d dark/5128.pgm -sm100 -nh -L0.01 -U1000 -i 5126.txt -e 5126.eps -n 5126.ppm -t 118 -s71:76 pgm/5126.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.
