Snímek 5278


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 20:22:28
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5278.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   -59   -54   -54   -58        -0.0221  -0.0117  -0.0198  -0.0154
 10   -16   -11   -11   -15        -0.00601  -0.00239  -0.00511  -0.00365
 50    49    76    78    52         0.0184   0.0167   0.0177   0.0173
 90   173   281   282   194         0.0649   0.0611   0.0661   0.0624
 99  1466  2289  2287  1146         0.550    0.496    0.390    0.515 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0578*0.84 sr ( 7.57E-8 sr/4px) is  0.00197 lx ( 0.00222 lx tilewise);
# tilewise luminance  0.0359 cd/m2 with rel. SD  175 % (summing pixels below 15850 and with non-zero green: there is 84.0 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average= 121.0  minimum= -140  maximum=15869   over 15850: 1689 zero: 15.9 %
# GrUp average= 186.7  minimum= -134  maximum=15866   over 15850: 2137 zero: 16.2 %
# GrDw average= 187.2  minimum= -137  maximum=15866   over 15850: 2119 zero: 15.8 %
# Blue average= 123.8  minimum= -147  maximum=15867   over 15850: 1499 zero: 16.8 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5277.pgm -nh -nt -i 5278.txt -t 118 -s71:76 pgm/5278.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 20:22:28
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5278.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   -59   -54   -54   -58        -0.0221  -0.0117  -0.0198  -0.0154
 10   -16   -11   -11   -15        -0.00601  -0.00239  -0.00511  -0.00365
 50    49    76    78    52         0.0184   0.0167   0.0177   0.0173
 90   173   281   282   194         0.0649   0.0611   0.0661   0.0624
 99  1468  2291  2290  1146         0.551    0.497    0.390    0.516 
100 15869 15869 15869 15869         5.96     3.44     5.41     4.32  
# flux from 0.00102 sr ( 7.57E-8 sr/4px) is  5.83E-4 lx (points with luminances over  0.20   and below  2.5   )
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average=2010.5  minimum= -125  maximum=15869   over 15850: 752089
# GrUp average=2654.5  minimum= -112  maximum=15866   over 15850: 752537
# GrDw average=2676.7  minimum= -112  maximum=15866   over 15850: 752519
# Blue average=1748.0  minimum= -120  maximum=15867   over 15850: 751899

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -L0.2 -U2.5 -i 5278.txt -e 5278.eps -n 5278.ppm -t 118 -s71:76 pgm/5278.pgm

Just points with luminances below 0.20 and with non-zero green: there is 83.7 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 20:22:28
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5278.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   -59   -54   -54   -58        -0.0221  -0.0117  -0.0198  -0.0154
 10   -16   -11   -11   -15        -0.00601  -0.00239  -0.00511  -0.00365
 50    49    76    78    52         0.0184   0.0167   0.0177   0.0173
 90   173   281   282   194         0.0649   0.0611   0.0661   0.0624
 99  1466  2289  2287  1146         0.550    0.496    0.390    0.515 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0568*0.84 sr ( 7.57E-8 sr/4px) is  0.00133 lx ( 0.00156 lx tilewise);
# tilewise luminance  0.0276 cd/m2 with rel. SD  111 % (points with luminances below  0.20   and with non-zero green: there is 83.7 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average=  85.1  minimum= -140  maximum=15869   out of range: 15415 zero: 16.2 %
# GrUp average= 130.2  minimum= -134  maximum=15866   out of range: 15863 zero: 16.5 %
# GrDw average= 130.9  minimum= -137  maximum=15866   out of range: 15845 zero: 16.1 %
# Blue average=  94.8  minimum= -147  maximum=15867   out of range: 15225 zero: 17.1 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -U0.2 -i 5278.txt -e 5278.eps -n 5278.ppm -t 118 -s71:76 pgm/5278.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.