Snímek 5141


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    : 2006:02:24 20:29:43
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5141.pgm)
# Focal length : 13.6mm  (35mm equivalent: 92mm)
# 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   -51   -44   -44   -57        -0.0191  -0.00955  -0.0194  -0.0129
 10    -6     0     0   -17        -0.00225   0.00    -0.00579  -7.88E-4
 50    51    62    63    29         0.0191   0.0136   0.00988   0.0155
 90   136   164   165    95         0.0510   0.0357   0.0324   0.0411
 99  1163  1102  1101   348         0.436    0.239    0.119    0.308 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.115*0.93 sr ( 1.51E-7 sr/4px) is  0.00305 lx ( 0.00361 lx tilewise);
# tilewise luminance  0.0296 cd/m2 with rel. SD  117 % (summing pixels below 15850 and with non-zero green: there is 93.5 % of them)
# Fuji Devignetting: 2 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 103.9  minimum= -143  maximum=15869   over 15850: 813 zero:  8.3 %
# GrUp average= 115.1  minimum= -131  maximum=15866   over 15850: 750 zero:  6.8 %
# GrDw average= 115.1  minimum= -138  maximum=15866   over 15850: 753 zero:  6.3 %
# Blue average=  57.6  minimum= -160  maximum=15867   over 15850: 301 zero: 15.1 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5140.pgm -nh -nt -i 5141.txt -t 118 -s71:76 pgm/5141.pgm

Just points with luminances over 0.30 and below 1.0 cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:24 20:29:43
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5141.pgm)
# Focal length : 13.6mm  (35mm equivalent: 92mm)
# 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   -51   -44   -44   -57        -0.0191  -0.00955  -0.0194  -0.0129
 10    -6     0     0   -17        -0.00225   0.00    -0.00579  -7.88E-4
 50    51    62    63    29         0.0191   0.0136   0.00988   0.0155
 90   136   164   165    95         0.0510   0.0357   0.0324   0.0411
 99  1163  1102  1101   348         0.436    0.239    0.119    0.308 
100 15869 15866 15866 15869         5.96     3.44     5.41     4.32  
# flux from 7.83E-4 sr ( 1.51E-7 sr/4px) is  4.16E-4 lx (points with luminances over  0.30   and below  1.0   )
# Fuji Devignetting: 2 # dark frame dark/5140.pgm subtracted from all values
# Red  average=2365.7  minimum= -120  maximum=15869   over 15850: 760557
# GrUp average=2418.1  minimum= -118  maximum=15866   over 15850: 760494
# GrDw average=2399.8  minimum= -138  maximum=15866   over 15850: 760497
# Blue average=1274.6  minimum= -137  maximum=15867   over 15850: 760045

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -L0.3 -U1 -i 5141.txt -e 5141.eps -n 5141.ppm -t 118 -s71:76 pgm/5141.pgm

Just points with luminances below 0.30 and with non-zero green: there is 93.4 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:24 20:29:43
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5141.pgm)
# Focal length : 13.6mm  (35mm equivalent: 92mm)
# 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   -51   -44   -44   -57        -0.0191  -0.00955  -0.0194  -0.0129
 10    -6     0     0   -17        -0.00225   0.00    -0.00579  -7.88E-4
 50    51    62    63    29         0.0191   0.0136   0.00988   0.0155
 90   136   164   165    95         0.0510   0.0357   0.0324   0.0411
 99  1163  1102  1101   348         0.436    0.239    0.119    0.308 
100 15869 15866 15866 15867         5.96     3.44     5.40     4.32  
# flux from 0.114*0.93 sr ( 1.51E-7 sr/4px) is  0.00221 lx ( 0.00274 lx tilewise);
# tilewise luminance  0.0236 cd/m2 with rel. SD 75.2 % (points with luminances below  0.30   and with non-zero green: there is 93.4 % of them)
# Fuji Devignetting: 2 # dark frame dark/5140.pgm subtracted from all values
# Red  average=  74.2  minimum= -143  maximum=15869   out of range: 7677 zero:  8.4 %
# GrUp average=  88.1  minimum= -131  maximum=15866   out of range: 7614 zero:  6.8 %
# GrDw average=  88.0  minimum= -138  maximum=15866   out of range: 7617 zero:  6.4 %
# Blue average=  47.0  minimum= -160  maximum=15867   out of range: 7165 zero: 15.3 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -U0.3 -i 5141.txt -e 5141.eps -n 5141.ppm -t 118 -s71:76 pgm/5141.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.