Snímek 5272


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 20:19:11
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5272.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   -17   -11   -11   -16        -0.00638  -0.00239  -0.00545  -0.00378
 50    42    67    67    45         0.0158   0.0145   0.0153   0.0150
 90   153   246   246   169         0.0574   0.0534   0.0576   0.0548
 99  1057  1641  1644   863         0.397    0.356    0.294    0.370 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0579*0.84 sr ( 7.57E-8 sr/4px) is  0.00166 lx ( 0.00190 lx tilewise);
# tilewise luminance  0.0307 cd/m2 with rel. SD  174 % (summing pixels below 15850 and with non-zero green: there is 83.5 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average= 102.2  minimum= -140  maximum=15869   over 15850: 1096 zero: 16.1 %
# GrUp average= 159.5  minimum= -135  maximum=15866   over 15850: 1431 zero: 16.4 %
# GrDw average= 159.0  minimum= -144  maximum=15866   over 15850: 1467 zero: 16.5 %
# Blue average= 105.9  minimum= -147  maximum=15867   over 15850: 1112 zero: 16.9 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5277.pgm -nh -nt -i 5272.txt -t 118 -s71:76 pgm/5272.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 20:19:11
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5272.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   -17   -11   -11   -16        -0.00638  -0.00239  -0.00545  -0.00378
 50    42    67    67    45         0.0158   0.0145   0.0153   0.0150
 90   153   246   246   169         0.0574   0.0534   0.0576   0.0548
 99  1058  1643  1646   864         0.397    0.357    0.294    0.371 
100 15869 15869 15869 15869         5.96     3.44     5.41     4.32  
# flux from 8.45E-4 sr ( 7.57E-8 sr/4px) is  4.50E-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=1921.1  minimum= -110  maximum=15869   over 15850: 754407
# GrUp average=2537.1  minimum= -125  maximum=15866   over 15850: 754742
# GrDw average=2510.3  minimum= -126  maximum=15866   over 15850: 754778
# Blue average=1722.7  minimum= -122  maximum=15867   over 15850: 754423

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -L0.2 -U2.5 -i 5272.txt -e 5272.eps -n 5272.ppm -t 118 -s71:76 pgm/5272.pgm

Just points with luminances below 0.20 and with non-zero green: there is 83.3 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:26 20:19:11
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5272.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   -17   -11   -11   -16        -0.00638  -0.00239  -0.00545  -0.00378
 50    42    67    67    45         0.0158   0.0145   0.0153   0.0150
 90   153   246   246   169         0.0574   0.0534   0.0576   0.0548
 99  1057  1641  1644   863         0.397    0.356    0.294    0.370 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.0570*0.83 sr ( 7.57E-8 sr/4px) is  0.00117 lx ( 0.00140 lx tilewise);
# tilewise luminance  0.0246 cd/m2 with rel. SD  117 % (points with luminances below  0.20   and with non-zero green: there is 83.3 % of them)
# Fuji Devignetting: 2 # dark frame dark/5277.pgm subtracted from all values
# Red  average=  74.6  minimum= -140  maximum=15869   out of range: 12425 zero: 16.3 %
# GrUp average= 116.6  minimum= -135  maximum=15866   out of range: 12760 zero: 16.7 %
# GrDw average= 116.3  minimum= -144  maximum=15866   out of range: 12796 zero: 16.8 %
# Blue average=  81.4  minimum= -147  maximum=15867   out of range: 12441 zero: 17.2 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5277.pgm -sm100 -nh -U0.2 -i 5272.txt -e 5272.eps -n 5272.ppm -t 118 -s71:76 pgm/5272.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.