Snímek 5150
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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 21:34:34
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5150.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 93 137 137 74 0.0267 0.0228 0.0193 0.0241
10 308 426 427 220 0.0885 0.0708 0.0574 0.0770
50 647 929 929 558 0.186 0.154 0.146 0.165
90 8158 12183 12202 6912 2.34 2.03 1.80 2.14
99 15869 15866 15866 15867 4.56 2.64 4.14 3.31
100 15869 15866 15866 15867 4.56 2.64 4.14 3.31
# flux from 0.599 sr ( 8.59E-7 sr/4px) is 0.192 lx ( 0.234 lx tilewise);
# tilewise luminance 0.400 cd/m2 with rel. SD 126 % (summing pixels below 15850)
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red average=1626.0 minimum= -76 maximum=15869 over 15850: 41207
# GrUp average=1886.0 minimum= -39 maximum=15866 over 15850: 61883
# GrDw average=1886.8 minimum= -62 maximum=15866 over 15850: 61911
# Blue average=1617.5 minimum= -69 maximum=15867 over 15850: 26493
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5140.pgm -nh -nt -i 5150.txt -t 118 -s71:76 pgm/5150.pgm
Just points with luminances over 0.30 and below 1.0 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 21:34:34
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5150.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 93 137 137 74 0.0267 0.0228 0.0193 0.0241
10 308 426 427 220 0.0885 0.0708 0.0574 0.0770
50 647 929 929 558 0.186 0.154 0.146 0.165
90 8158 12183 12202 6912 2.34 2.03 1.80 2.14
99 15869 15866 15866 15867 4.56 2.64 4.14 3.31
100 15869 15866 15866 15869 4.56 2.64 4.14 3.31
# flux from 0.101 sr ( 8.59E-7 sr/4px) is 0.0515 lx (points with luminances over 0.30 and below 1.0 )
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red average=3696.2 minimum= -63 maximum=15869 over 15850: 624804
# GrUp average=3176.3 minimum= -31 maximum=15866 over 15850: 645480
# GrDw average=3179.0 minimum= -61 maximum=15866 over 15850: 645508
# Blue average=4162.8 minimum= -52 maximum=15867 over 15850: 610090
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5140.pgm -sm100 -nh -L0.3 -U1 -i 5150.txt -e 5150.eps -n 5150.ppm -t 118 -s71:76 pgm/5150.pgm
Just points with luminances below 0.30 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 21:34:34
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5150.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 93 137 137 74 0.0267 0.0228 0.0193 0.0241
10 308 426 427 220 0.0885 0.0708 0.0574 0.0770
50 647 929 929 558 0.186 0.154 0.146 0.165
90 8158 12183 12202 6912 2.34 2.03 1.80 2.14
99 15869 15866 15866 15867 4.56 2.64 4.14 3.31
100 15869 15866 15866 15867 4.56 2.64 4.14 3.31
# flux from 0.450 sr ( 8.59E-7 sr/4px) is 0.0600 lx ( 0.0893 lx tilewise);
# tilewise luminance 0.267 cd/m2 with rel. SD 172 % (points with luminances below 0.30 )
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red average=1036.3 minimum= -76 maximum=15869 out of range: 215680
# GrUp average= 826.6 minimum= -39 maximum=15866 out of range: 236356
# GrDw average= 827.0 minimum= -62 maximum=15866 out of range: 236384
# Blue average=1185.4 minimum= -69 maximum=15867 out of range: 200966
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -ft -d dark/5140.pgm -sm100 -nh -U0.3 -i 5150.txt -e 5150.eps -n 5150.ppm -t 118 -s71:76 pgm/5150.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.
