Snímek 5127
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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 19:47:07
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5127.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 -67 -61 -62 -66 -0.0193 -0.0102 -0.0172 -0.0134
10 -29 -23 -24 -29 -0.00833 -0.00390 -0.00756 -0.00545
50 9 14 14 6 0.00259 0.00233 0.00156 0.00242
90 57 62 62 53 0.0164 0.0103 0.0138 0.0124
99 94 102 101 90 0.0270 0.0169 0.0235 0.0204
100 7963 10629 15827 13260 2.29 2.20 3.46 2.23
# flux from 0.654*0.77 sr ( 8.59E-7 sr/4px) is 0.00200 lx ( 0.00290 lx tilewise);
# tilewise luminance 0.00506 cd/m2 with rel. SD 40.5 % (summing pixels below 15850 and with non-zero green: there is 76.6 % of them)
# Fuji Devignetting: 1 # dark frame dark/5128.pgm subtracted from all values
# Red average= 16.8 minimum= -164 maximum= 7963 over 15850: 0 zero: 25.5 %
# GrUp average= 23.1 minimum= -163 maximum=10629 over 15850: 0 zero: 23.8 %
# GrDw average= 22.8 minimum= -146 maximum=15827 over 15850: 1 zero: 23.1 %
# Blue average= 15.1 minimum= -150 maximum=13260 over 15850: 0 zero: 29.2 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5128.pgm -nh -nt -i 5127.txt -t 118 -s71:76 pgm/5127.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 19:47:07
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5127.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 -67 -61 -62 -66 -0.019 -0.010 -0.017 -0.0134
10 -29 -23 -24 -29 -0.0083 -0.0039 -0.0076 -0.00545
50 9 14 14 6 0.0026 0.0023 0.0016 0.00242
90 57 62 62 53 0.016 0.010 0.014 0.0124
99 94 102 101 90 0.027 0.017 0.023 0.0204
100 3496 4779 15827 1226 1.0 1.7 0.32 1.46
# flux from 3.06E-4 sr ( 8.59E-7 sr/4px) is 1.12E-5 lx (points with luminances over 0.020 )
# Fuji Devignetting: 1 # dark frame dark/5128.pgm subtracted from all values
# Red average= 151.8 minimum= -164 maximum= 7963 over 15850: 765752
# GrUp average= 193.6 minimum= -163 maximum=10629 over 15850: 765752 zero: 1.4 %
# GrDw average= 212.4 minimum= -135 maximum=15827 over 15850: 765752 zero: 1.7 %
# Blue average= 178.3 minimum= -150 maximum=13260 over 15850: 765752 zero: 18.5 %
End of results of "raw2lum" (version 1.19) with parameters:
-c fuji -ft -d dark/5128.pgm -sm100 -nh -L0.02 -i 5127.txt -e 5127.eps -n 5127.ppm -t 118 -s71:76 pgm/5127.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 19:47:07
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5127.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 -67 -61 -62 -66 -0.019 -0.010 -0.017 -0.0134
10 -29 -23 -24 -29 -0.0083 -0.0039 -0.0076 -0.00545
50 9 14 14 6 0.0026 0.0023 0.0016 0.00242
90 57 62 62 53 0.016 0.010 0.014 0.0124
99 94 102 101 90 0.027 0.017 0.023 0.0204
100 7963 10629 15827 13260 2.3 2.2 3.5 2.23
# flux from 0.0459 sr ( 8.59E-7 sr/4px) is 5.30E-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= 67.0 minimum= -164 maximum= 7963 over 15850: 712371
# GrUp average= 51.2 minimum= -163 maximum=10629 over 15850: 712371 zero: 8.2 %
# GrDw average= 53.0 minimum= -146 maximum=15827 over 15850: 712371 zero: 6.2 %
# Blue average= 15.5 minimum= -150 maximum=13260 over 15850: 712371 zero: 29.2 %
End of results of "raw2lum" (version 1.19) with parameters:
-c fuji -ft -d dark/5128.pgm -sm100 -nh -L0.01 -U1000 -i 5127.txt -e 5127.eps -n 5127.ppm -t 118 -s71:76 pgm/5127.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.
