Snímek 5237
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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 18:15:44
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5237.pgm)
# Focal length : 10.7mm (35mm equivalent: 72mm)
# 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 68 88 89 46 0.0195 0.0147 0.0120 0.0164
10 259 312 311 197 0.0744 0.0517 0.0514 0.0597
50 1312 1950 1950 1599 0.377 0.324 0.417 0.342
90 5410 6586 6587 3278 1.55 1.09 0.855 1.26
99 15869 15866 15866 15843 4.56 2.64 4.13 3.31
100 15869 15866 15866 15867 4.56 2.64 4.14 3.31
# flux from 0.179 sr ( 2.44E-7 sr/4px) is 0.0811 lx ( 0.0851 lx tilewise);
# tilewise luminance 0.477 cd/m2 with rel. SD 106 % (summing pixels below 15850)
# Fuji Devignetting: 2 # dark frame dark/5255.pgm subtracted from all values
# Red average=1973.7 minimum= -73 maximum=15869 over 15850: 26960
# GrUp average=2510.5 minimum= -66 maximum=15866 over 15850: 31052
# GrDw average=2509.2 minimum= -95 maximum=15866 over 15850: 31093
# Blue average=1766.9 minimum= -117 maximum=15867 over 15850: 10526
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5255.pgm -nh -nt -i 5237.txt -t 118 -s71:76 pgm/5237.pgm
Just points with luminances over 0.30 and below 2.5 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 18:15:44
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5237.pgm)
# Focal length : 10.7mm (35mm equivalent: 72mm)
# 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 68 88 89 46 0.0195 0.0147 0.0120 0.0164
10 259 312 311 197 0.0744 0.0517 0.0514 0.0597
50 1312 1950 1950 1599 0.377 0.324 0.417 0.342
90 5410 6586 6587 3278 1.55 1.09 0.855 1.26
99 15869 15866 15866 15843 4.56 2.64 4.13 3.31
100 15869 15866 15866 15867 4.56 2.64 4.14 3.31
# flux from 0.0969 sr ( 2.44E-7 sr/4px) is 0.0641 lx (points with luminances over 0.30 and below 2.5 )
# Fuji Devignetting: 2 # dark frame dark/5255.pgm subtracted from all values
# Red average=2924.5 minimum= -73 maximum=15869 over 15850: 362748
# GrUp average=3625.9 minimum= -63 maximum=15866 over 15850: 366840
# GrDw average=3624.9 minimum= -41 maximum=15866 over 15850: 366881
# Blue average=2497.9 minimum= -117 maximum=15867 over 15850: 346314
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5255.pgm -sm100 -nh -L0.3 -U2.5 -i 5237.txt -e 5237.eps -n 5237.ppm -t 118 -s71:76 pgm/5237.pgm
Just points with luminances below 0.30 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:26 18:15:44
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5237.pgm)
# Focal length : 10.7mm (35mm equivalent: 72mm)
# 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 68 88 89 46 0.0195 0.0147 0.0120 0.0164
10 259 312 311 197 0.0744 0.0517 0.0514 0.0597
50 1312 1950 1950 1599 0.377 0.324 0.417 0.342
90 5410 6586 6587 3278 1.55 1.09 0.855 1.26
99 15869 15866 15866 15843 4.56 2.64 4.13 3.31
100 15869 15866 15866 15867 4.56 2.64 4.14 3.31
# flux from 0.0804 sr ( 2.44E-7 sr/4px) is 0.0134 lx ( 0.0142 lx tilewise);
# tilewise luminance 0.168 cd/m2 with rel. SD 166 % (points with luminances below 0.30 )
# Fuji Devignetting: 2 # dark frame dark/5255.pgm subtracted from all values
# Red average= 858.7 minimum= -73 maximum=15869 out of range: 430345
# GrUp average=1023.8 minimum= -66 maximum=15866 out of range: 434437
# GrDw average=1022.0 minimum= -95 maximum=15866 out of range: 434478
# Blue average=1332.4 minimum= -117 maximum=15867 out of range: 413911
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -ft -d dark/5255.pgm -sm100 -nh -U0.3 -i 5237.txt -e 5237.eps -n 5237.ppm -t 118 -s71:76 pgm/5237.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.
