Snímek 5285


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 20:25:08
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5285.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   -56   -51   -51   -56        -0.0210  -0.0111  -0.0191  -0.0145
 10   -14    -8    -7   -14        -0.00525  -0.00163  -0.00477  -0.00290
 50    45    68    69    43         0.0169   0.0149   0.0146   0.0156
 90   183   273   275   175         0.0687   0.0594   0.0596   0.0627
 99  3381  5282  5289  2874         1.27     1.15     0.979    1.19  
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0578*0.86 sr ( 7.57E-8 sr/4px) is  0.00261 lx ( 0.00298 lx tilewise);
# tilewise luminance  0.0468 cd/m2 with rel. SD  258 % (summing pixels below 15850 and with non-zero green: there is 86.1 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average= 171.2  minimum= -144  maximum=15869   over 15850: 1600 zero: 14.2 %
# GrUp average= 236.3  minimum= -134  maximum=15866   over 15850: 2594 zero: 14.1 %
# GrDw average= 236.7  minimum= -148  maximum=15866   over 15850: 2571 zero: 13.6 %
# Blue average= 159.0  minimum= -163  maximum=15867   over 15850: 1327 zero: 15.5 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5277.pgm -nh -nt -i 5285.txt -t 118 -s71:76 pgm/5285.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 20:25:08
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5285.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   -56   -51   -51   -56        -0.0210  -0.0111  -0.0191  -0.0145
 10   -14    -8    -7   -14        -0.00525  -0.00163  -0.00477  -0.00290
 50    45    68    69    43         0.0169   0.0149   0.0146   0.0156
 90   183   274   275   175         0.0687   0.0596   0.0596   0.0627
 99  3396  5306  5317  2883         1.27     1.15     0.982    1.20  
100 15869 15869 15869 15869         5.96     3.44     5.41     4.32  
# flux from 0.00127 sr ( 7.57E-8 sr/4px) is  0.00109 lx (points with luminances over  0.30   and below  2.5   )
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average=3073.3  minimum=  -97  maximum=15869   over 15850: 748200
# GrUp average=3949.8  minimum= -112  maximum=15866   over 15850: 749194
# GrDw average=3971.0  minimum=  -97  maximum=15866   over 15850: 749171
# Blue average=2738.3  minimum= -112  maximum=15867   over 15850: 747927

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -L0.3 -U2.5 -i 5285.txt -e 5285.eps -n 5285.ppm -t 118 -s71:76 pgm/5285.pgm

Just points with luminances below 0.30 and with non-zero green: there is 85.8 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 20:25:08
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5285.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   -56   -51   -51   -56        -0.0210  -0.0111  -0.0191  -0.0145
 10   -14    -8    -7   -14        -0.00525  -0.00163  -0.00477  -0.00290
 50    45    68    69    43         0.0169   0.0149   0.0146   0.0156
 90   183   273   275   175         0.0687   0.0594   0.0596   0.0627
 99  3381  5282  5289  2874         1.27     1.15     0.979    1.19  
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0564*0.86 sr ( 7.57E-8 sr/4px) is  0.00131 lx ( 0.00166 lx tilewise);
# tilewise luminance  0.0316 cd/m2 with rel. SD  193 % (points with luminances below  0.30   and with non-zero green: there is 85.8 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average=  98.7  minimum= -144  maximum=15869   out of range: 19234 zero: 14.5 %
# GrUp average= 123.6  minimum= -134  maximum=15866   out of range: 20228 zero: 14.5 %
# GrDw average= 124.7  minimum= -148  maximum=15866   out of range: 20205 zero: 13.9 %
# Blue average=  97.6  minimum= -163  maximum=15867   out of range: 18961 zero: 15.9 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -U0.3 -i 5285.txt -e 5285.eps -n 5285.ppm -t 118 -s71:76 pgm/5285.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.