Snímek 5139


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 20:24:38
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5139.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   -35   -20   -19   -35        -0.0101  -0.00324  -0.00913  -0.00563
 10    12    35    37    10         0.00345   0.00598   0.00261   0.00509
 50    99   153   153    99         0.0284   0.0254   0.0258   0.0265
 90   610   897   900   508         0.175    0.149    0.132    0.158 
 99 15841 15862 15860 14810         4.55     2.63     3.86     3.31  
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.642*0.98 sr ( 8.59E-7 sr/4px) is  0.0516 lx ( 0.0605 lx tilewise);
# tilewise luminance  0.0963 cd/m2 with rel. SD  226 % (summing pixels below 15850 and with non-zero green: there is 98.5 % of them)
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 394.5  minimum= -128  maximum=15869   over 15850: 10080 zero:  3.0 %
# GrUp average= 485.7  minimum= -118  maximum=15866   over 15850: 13813 zero:  1.6 %
# GrDw average= 485.1  minimum= -105  maximum=15866   over 15850: 13855 zero:  1.5 %
# Blue average= 363.8  minimum= -143  maximum=15867   over 15850: 7167 zero:  3.5 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -fa -d dark/5140.pgm -nh -nt -i 5139.txt -t 118 -s71:76 pgm/5139.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 20:24:38
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5139.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   -35   -20   -19   -35        -0.0101  -0.00324  -0.00913  -0.00563
 10    12    35    37    10         0.00345   0.00598   0.00261   0.00509
 50    99   153   153    99         0.0284   0.0254   0.0258   0.0265
 90   610   897   900   508         0.175    0.149    0.132    0.158 
 99 15841 15862 15860 14810         4.55     2.63     3.86     3.31  
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.0203 sr ( 8.59E-7 sr/4px) is  0.0111 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=3715.1  minimum= -128  maximum=15869   over 15850: 737945
# GrUp average=3459.1  minimum= -115  maximum=15866   over 15850: 741678
# GrDw average=3439.1  minimum=  -96  maximum=15866   over 15850: 741720
# Blue average=3676.5  minimum= -143  maximum=15867   over 15850: 735032

End of results of "raw2lum" (version 1.21) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -L0.3 -U1 -i 5139.txt -e 5139.eps -n 5139.ppm -t 118 -s71:76 pgm/5139.pgm

Just points with luminances below 0.30 and with non-zero green: there is 98.4 % of them cd/m². In grid tiles, flux densities from these points and tiles are given.

# Date/Time    : 2006:02:24 20:24:38
# Resolution   : 1280 x 960 in jpeg (1424x1076 in pgm/5139.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   -35   -20   -19   -35        -0.0101  -0.00324  -0.00913  -0.00563
 10    12    35    37    10         0.00345   0.00598   0.00261   0.00509
 50    99   153   153    99         0.0284   0.0254   0.0258   0.0265
 90   610   897   900   508         0.175    0.149    0.132    0.158 
 99 15841 15862 15860 14810         4.55     2.63     3.86     3.31  
100 15869 15866 15866 15867         4.56     2.64     4.14     3.31  
# flux from 0.610*0.98 sr ( 8.59E-7 sr/4px) is  0.0226 lx ( 0.0306 lx tilewise);
# tilewise luminance  0.0774 cd/m2 with rel. SD  251 % (points with luminances below  0.30   and with non-zero green: there is 98.4 % of them)
# Fuji Devignetting: 1 # dark frame dark/5140.pgm subtracted from all values
# Red  average= 222.1  minimum= -128  maximum=15869   out of range: 46635 zero:  3.1 %
# GrUp average= 237.5  minimum= -118  maximum=15866   out of range: 50368 zero:  1.7 %
# GrDw average= 237.0  minimum= -105  maximum=15866   out of range: 50410 zero:  1.6 %
# Blue average= 245.0  minimum= -143  maximum=15867   out of range: 43722 zero:  3.7 %

End of results of "raw2lum" (version 1.22) with parameters:
  -c fuji -ft -d dark/5140.pgm -sm100 -nh -U0.3 -i 5139.txt -e 5139.eps -n 5139.ppm -t 118 -s71:76 pgm/5139.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.