Snímek 5269


původní	zesvětlený	barevně kódovaný

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 20:01:55
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5269.pgm)
# Focal length : 19.2mm  (35mm equivalent: 130mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# 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)* 2.17E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -61   -55   -55   -60        -0.0229  -0.0119  -0.0204  -0.0158
 10   -20   -13   -14   -19        -0.00751  -0.00293  -0.00647  -0.00453
 50    31    45    46    31         0.0116   0.00987   0.0106   0.0105
 90   127   200   200   131         0.0477   0.0434   0.0446   0.0449
 99   565   866   857   422         0.212    0.187    0.144    0.196 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0579*0.83 sr ( 7.57E-8 sr/4px) is  0.00122 lx ( 0.00142 lx tilewise);
# tilewise luminance  0.0241 cd/m2 with rel. SD  153 % (summing pixels below 15850 and with non-zero green: there is 82.8 % of them)
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=  75.2  minimum= -141  maximum=15869   over 15850: 496 zero: 18.0 %
# GrUp average= 116.5  minimum= -137  maximum=15866   over 15850: 656 zero: 17.4 %
# GrDw average= 117.0  minimum= -130  maximum=15866   over 15850: 640 zero: 17.0 %
# Blue average=  72.5  minimum= -138  maximum=15867   over 15850: 376 zero: 19.0 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5264.pgm -nh -nt -i 5269.txt -t 118 -s71:76 pgm/5269.pgm

Just points with luminances over 0.20 and below 2.5 cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 20:01:55
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5269.pgm)
# Focal length : 19.2mm  (35mm equivalent: 130mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# 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)* 2.17E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -61   -55   -55   -60        -0.0229  -0.0119  -0.0204  -0.0158
 10   -20   -13   -14   -19        -0.00751  -0.00293  -0.00647  -0.00453
 50    31    45    46    31         0.0116   0.00987   0.0106   0.0105
 90   127   200   200   131         0.0477   0.0434   0.0446   0.0449
 99   565   866   857   423         0.212    0.187    0.144    0.196 
100 15869 15869 15869 15869         5.96     3.44     5.41     4.32  
# flux from 5.00E-4 sr ( 7.57E-8 sr/4px) is  2.63E-4 lx (points with luminances over  0.20   and below  2.5   )
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=1822.6  minimum= -129  maximum=15869   over 15850: 759282
# GrUp average=2421.5  minimum= -105  maximum=15866   over 15850: 759442
# GrDw average=2460.4  minimum= -119  maximum=15866   over 15850: 759426
# Blue average=1499.7  minimum= -117  maximum=15867   over 15850: 759162

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5264.pgm -sm100 -nh -L0.2 -U2.5 -i 5269.txt -e 5269.eps -n 5269.ppm -t 118 -s71:76 pgm/5269.pgm

Just points with luminances below 0.20 and with non-zero green: there is 82.7 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 20:01:55
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5269.pgm)
# Focal length : 19.2mm  (35mm equivalent: 130mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# 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)* 2.17E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -61   -55   -55   -60        -0.0229  -0.0119  -0.0204  -0.0158
 10   -20   -13   -14   -19        -0.00751  -0.00293  -0.00647  -0.00453
 50    31    45    46    31         0.0116   0.00987   0.0106   0.0105
 90   127   200   200   131         0.0477   0.0434   0.0446   0.0449
 99   565   866   857   422         0.212    0.187    0.144    0.196 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0574*0.83 sr ( 7.57E-8 sr/4px) is  9.35E-4 lx ( 0.00112 lx tilewise);
# tilewise luminance  0.0200 cd/m2 with rel. SD  109 % (points with luminances below  0.20   and with non-zero green: there is 82.7 % of them)
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=  58.2  minimum= -141  maximum=15869   out of range: 7210 zero: 18.2 %
# GrUp average=  90.9  minimum= -137  maximum=15866   out of range: 7370 zero: 17.5 %
# GrDw average=  91.6  minimum= -130  maximum=15866   out of range: 7354 zero: 17.2 %
# Blue average=  59.8  minimum= -138  maximum=15867   out of range: 7090 zero: 19.2 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5264.pgm -sm100 -nh -U0.2 -i 5269.txt -e 5269.eps -n 5269.ppm -t 118 -s71:76 pgm/5269.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.