Snímek 5262


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 19:49:20
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5262.pgm)
# Focal length : 15.4mm  (35mm equivalent: 104mm)
# 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   -60   -54   -54   -58        -0.0225  -0.0117  -0.0198  -0.0155
 10   -18   -11   -11   -17        -0.00676  -0.00239  -0.00579  -0.00392
 50    39    58    59    37         0.0146   0.0127   0.0126   0.0134
 90   148   228   229   144         0.0555   0.0496   0.0490   0.0517
 99   348   543   544   299         0.131    0.118    0.102    0.122 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0900*0.85 sr ( 1.18E-7 sr/4px) is  0.00198 lx ( 0.00226 lx tilewise);
# tilewise luminance  0.0249 cd/m2 with rel. SD  112 % (summing pixels below 15850 and with non-zero green: there is 84.5 % of them)
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=  76.0  minimum= -153  maximum=15869   over 15850: 368 zero: 16.1 %
# GrUp average= 118.8  minimum= -134  maximum=15866   over 15850: 505 zero: 15.7 %
# GrDw average= 118.7  minimum= -134  maximum=15866   over 15850: 508 zero: 15.2 %
# Blue average=  72.3  minimum= -138  maximum=15867   over 15850: 286 zero: 17.4 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5264.pgm -nh -nt -i 5262.txt -t 118 -s71:76 pgm/5262.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 19:49:20
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5262.pgm)
# Focal length : 15.4mm  (35mm equivalent: 104mm)
# 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   -60   -54   -54   -58        -0.0225  -0.0117  -0.0198  -0.0155
 10   -18   -11   -11   -17        -0.00676  -0.00239  -0.00579  -0.00392
 50    39    58    59    37         0.0146   0.0127   0.0126   0.0134
 90   148   228   229   144         0.0555   0.0496   0.0490   0.0517
 99   348   543   544   299         0.131    0.118    0.102    0.122 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 3.81E-4 sr ( 1.18E-7 sr/4px) is  1.99E-4 lx ( 2.50E-4 lx tilewise);
# tilewise luminance  0.0429 cd/m2 with rel. SD  354 % (points with luminances over  0.20   and below  2.5   )
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=2008.2  minimum= -153  maximum=15869   out of range: 762683
# GrUp average=2496.4  minimum= -134  maximum=15866   out of range: 762820
# GrDw average=2488.8  minimum= -134  maximum=15866   out of range: 762823
# Blue average=1701.3  minimum= -138  maximum=15867   out of range: 762601

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5264.pgm -sm100 -nh -L0.2 -U2.5 -i 5262.txt -e 5262.eps -n 5262.ppm -t 118 -s71:76 pgm/5262.pgm

Just points with luminances below 0.20 and with non-zero green: there is 84.4 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 19:49:20
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5262.pgm)
# Focal length : 15.4mm  (35mm equivalent: 104mm)
# 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   -60   -54   -54   -58        -0.0225  -0.0117  -0.0198  -0.0155
 10   -18   -11   -11   -17        -0.00676  -0.00239  -0.00579  -0.00392
 50    39    58    59    37         0.0146   0.0127   0.0126   0.0134
 90   148   228   229   144         0.0555   0.0496   0.0490   0.0517
 99   348   543   544   299         0.131    0.118    0.102    0.122 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0896*0.84 sr ( 1.18E-7 sr/4px) is  0.00175 lx ( 0.00203 lx tilewise);
# tilewise luminance  0.0228 cd/m2 with rel. SD 98.2 % (points with luminances below  0.20   and with non-zero green: there is 84.4 % of them)
# Fuji Devignetting: 2 # dark frame dark/5264.pgm subtracted from all values
# Red  average=  67.6  minimum= -153  maximum=15869   out of range: 3685 zero: 16.1 %
# GrUp average= 106.1  minimum= -134  maximum=15866   out of range: 3822 zero: 15.8 %
# GrDw average= 106.1  minimum= -134  maximum=15866   out of range: 3825 zero: 15.3 %
# Blue average=  66.1  minimum= -138  maximum=15867   out of range: 3603 zero: 17.5 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5264.pgm -sm100 -nh -U0.2 -i 5262.txt -e 5262.eps -n 5262.ppm -t 118 -s71:76 pgm/5262.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.