Snímek 5148


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 20:36:15
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5148.pgm)
# Focal length : 12.0mm  (35mm equivalent: 81mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# Aperture     : f/2.8
# ISO equiv.   : 200

# Selected image percentils         L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 1.66E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -36   -23   -23   -35        -0.0103  -0.00382  -0.00913  -0.00610
 10    15    33    34    16         0.00431   0.00556   0.00417   0.00513
 50   126   205   206   129         0.0362   0.0341   0.0336   0.0349
 90  1038  1586  1582   825         0.298    0.263    0.215    0.275 
 99 15853 15866 15866 15813         4.56     2.64     4.12     3.31  
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.145*0.98 sr ( 1.94E-7 sr/4px) is  0.0155 lx ( 0.0189 lx tilewise);
# tilewise luminance  0.128 cd/m2 with rel. SD  222 % (summing pixels below 15850 and with non-zero green: there is 98.3 % of them)
# Fuji Devignetting: 2 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 545.6  minimum= -133  maximum=15869   over 15850: 11625 zero:  2.8 %
# GrUp average= 644.6  minimum= -130  maximum=15866   over 15850: 18786 zero:  1.8 %
# GrDw average= 644.9  minimum= -117  maximum=15866   over 15850: 18781 zero:  1.7 %
# Blue average= 487.9  minimum= -127  maximum=15867   over 15850: 8088 zero:  2.8 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5140.pgm -nh -nt -i 5148.txt -t 118 -s71:76 pgm/5148.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 20:36:15
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5148.pgm)
# Focal length : 12.0mm  (35mm equivalent: 81mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# Aperture     : f/2.8
# ISO equiv.   : 200


# Selected image percentils         L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 1.66E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -36   -23   -23   -35        -0.0103  -0.00382  -0.00913  -0.00610
 10    15    33    34    16         0.00431   0.00556   0.00417   0.00513
 50   126   205   206   129         0.0362   0.0341   0.0336   0.0349
 90  1038  1586  1582   825         0.298    0.263    0.215    0.275 
 99 15853 15866 15866 15813         4.56     2.64     4.12     3.31  
100 15869 15869 15866 15869         4.56     2.64     4.14     3.31  
# flux from 0.00657 sr ( 1.94E-7 sr/4px) is  0.00351 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=3955.3  minimum= -117  maximum=15869   over 15850: 724334
# GrUp average=3283.7  minimum= -118  maximum=15866   over 15850: 731495
# GrDw average=3294.2  minimum=  -92  maximum=15866   over 15850: 731490
# Blue average=3683.0  minimum= -110  maximum=15867   over 15850: 720797

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -L0.3 -U1 -i 5148.txt -e 5148.eps -n 5148.ppm -t 118 -s71:76 pgm/5148.pgm

Just points with luminances below 0.30 and with non-zero green: there is 98.1 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:24 20:36:15
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5148.pgm)
# Focal length : 12.0mm  (35mm equivalent: 81mm)
# CCD width    : 5.32mm
# Exposure time: 2.000 s 
# Aperture     : f/2.8
# ISO equiv.   : 200

# Selected image percentils         L=(1.730*0.35*R+1.000*0.65*G+1.570*0.00*B)* 1.66E-4
# %    R     G1    G2    B readings  R        G        B        L / cd/m2
  1   -36   -23   -23   -35        -0.0103  -0.00382  -0.00913  -0.00610
 10    15    33    34    16         0.00431   0.00556   0.00417   0.00513
 50   126   205   206   129         0.0362   0.0341   0.0336   0.0349
 90  1038  1586  1582   825         0.298    0.263    0.215    0.275 
 99 15853 15866 15866 15813         4.56     2.64     4.12     3.31  
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.134*0.98 sr ( 1.94E-7 sr/4px) is  0.00573 lx ( 0.00832 lx tilewise);
# tilewise luminance  0.0935 cd/m2 with rel. SD  232 % (points with luminances below  0.30   and with non-zero green: there is 98.1 % of them)
# Fuji Devignetting: 2 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 300.0  minimum= -133  maximum=15869   out of range: 65671 zero:  3.0 %
# GrUp average= 271.2  minimum= -130  maximum=15866   out of range: 72832 zero:  1.9 %
# GrDw average= 272.1  minimum= -117  maximum=15866   out of range: 72827 zero:  1.8 %
# Blue average= 323.9  minimum= -127  maximum=15867   out of range: 62134 zero:  3.0 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -U0.3 -i 5148.txt -e 5148.eps -n 5148.ppm -t 118 -s71:76 pgm/5148.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.