Snímek 5132


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 20:13:45
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5132.pgm)
# Focal length :  5.7mm  (35mm equivalent: 39mm)
# 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   -60   -53   -53   -60        -0.0172  -0.00880  -0.0156  -0.0118
 10   -18   -10   -10   -19        -0.00517  -0.00166  -0.00495  -0.00289
 50    34    47    48    29         0.00977   0.00789   0.00756   0.00855
 90   132   191   191   121         0.0379   0.0317   0.0316   0.0339
 99  1411  2071  2067  1083         0.405    0.344    0.282    0.365 
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.653*0.87 sr ( 8.59E-7 sr/4px) is  0.0134 lx ( 0.0161 lx tilewise);
# tilewise luminance  0.0262 cd/m2 with rel. SD  224 % (summing pixels below 15850 and with non-zero green: there is 87.2 % of them)
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 107.7  minimum= -136  maximum=15869   over 15850: 1211 zero: 14.6 %
# GrUp average= 143.4  minimum= -141  maximum=15866   over 15850: 1759 zero: 13.2 %
# GrDw average= 143.0  minimum= -149  maximum=15866   over 15850: 1748 zero: 12.4 %
# Blue average=  97.2  minimum= -152  maximum=15867   over 15850: 883 zero: 16.9 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5140.pgm -nh -nt -i 5132.txt -t 118 -s71:76 pgm/5132.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 20:13:45
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5132.pgm)
# Focal length :  5.7mm  (35mm equivalent: 39mm)
# 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   -60   -53   -53   -60        -0.0172  -0.00880  -0.0156  -0.0118
 10   -18   -10   -10   -19        -0.00517  -0.00166  -0.00495  -0.00289
 50    34    47    48    29         0.00977   0.00789   0.00756   0.00855
 90   132   191   191   121         0.0379   0.0317   0.0316   0.0339
 99  1412  2072  2069  1084         0.406    0.344    0.283    0.366 
100 15869 15869 15869 15869         4.56     2.64     4.14     3.31  
# flux from 0.00411 sr ( 8.59E-7 sr/4px) is  0.00212 lx (points with luminances over  0.30   and below  1.0   )
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red  average=3287.7  minimum= -132  maximum=15869   over 15850: 760483
# GrUp average=3454.2  minimum= -119  maximum=15866   over 15850: 761031
# GrDw average=3489.1  minimum= -126  maximum=15866   over 15850: 761020
# Blue average=3014.0  minimum= -122  maximum=15867   over 15850: 760155

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -L0.3 -U1 -i 5132.txt -e 5132.eps -n 5132.ppm -t 118 -s71:76 pgm/5132.pgm

Just points with luminances below 0.30 and with non-zero green: there is 87.1 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:24 20:13:45
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5132.pgm)
# Focal length :  5.7mm  (35mm equivalent: 39mm)
# 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   -60   -53   -53   -60        -0.0172  -0.00880  -0.0156  -0.0118
 10   -18   -10   -10   -19        -0.00517  -0.00166  -0.00495  -0.00289
 50    34    47    48    29         0.00977   0.00789   0.00756   0.00855
 90   132   191   191   121         0.0379   0.0317   0.0316   0.0339
 99  1411  2071  2067  1083         0.405    0.344    0.282    0.365 
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.647*0.87 sr ( 8.59E-7 sr/4px) is  0.00862 lx ( 0.0111 lx tilewise);
# tilewise luminance  0.0199 cd/m2 with rel. SD  153 % (points with luminances below  0.30   and with non-zero green: there is 87.1 % of them)
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red  average=  73.6  minimum= -136  maximum=15869   out of range: 8042 zero: 14.7 %
# GrUp average=  95.6  minimum= -141  maximum=15866   out of range: 8590 zero: 13.3 %
# GrDw average=  95.9  minimum= -149  maximum=15866   out of range: 8579 zero: 12.5 %
# Blue average=  71.5  minimum= -152  maximum=15867   out of range: 7714 zero: 17.0 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -U0.3 -i 5132.txt -e 5132.eps -n 5132.ppm -t 118 -s71:76 pgm/5132.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.