Snímek 5143
|
|
| 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 20:30:23
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5143.pgm)
# Focal length : 13.6mm (35mm equivalent: 92mm)
# CCD width : 5.32mm
# Exposure time: 0.008 s (1/125)
# 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)* 0.0542
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -69 -70 -6.66 -3.72 -5.96 -4.75
10 -36 -33 -33 -35 -3.38 -1.79 -2.98 -2.35
50 0 0 0 0 0.00 0.00 0.00 0.00
90 35 32 33 34 3.28 1.76 2.90 2.30
99 71 67 68 69 6.66 3.66 5.88 4.71
100 15869 15866 15866 7310 1.49E3 861 622 1.08E3
# flux from 0.116*0.49 sr ( 1.51E-7 sr/4px) is 0.00129 lx ( 0.00281 lx tilewise);
# tilewise luminance -2.04E-4 cd/m2 with rel. SD-1.14E5 % (summing pixels below 15850 and with non-zero green: there is 49.0 % of them)
# Fuji Devignetting: 2 # dark frame dark/5119.pgm subtracted from all values
# Red average= 0.3 minimum= -151 maximum=15869 over 15850: 3 zero: 46.3 %
# GrUp average= 0.4 minimum= -156 maximum=15866 over 15850: 4 zero: 51.8 %
# GrDw average= 0.5 minimum= -149 maximum=15866 over 15850: 3 zero: 50.1 %
# Blue average= -0.1 minimum= -150 maximum= 7310 over 15850: 0 zero: 48.5 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5119.pgm -nh -nt -i 5143.txt -t 118 -s71:76 pgm/5143.pgm
Just points with luminances over 25 and below 5.0E2 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 20:30:23
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5143.pgm)
# Focal length : 13.6mm (35mm equivalent: 92mm)
# CCD width : 5.32mm
# Exposure time: 0.008 s (1/125)
# 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)* 0.0542
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -69 -70 -6.66 -3.72 -5.96 -4.75
10 -36 -33 -33 -35 -3.38 -1.79 -2.98 -2.35
50 0 0 0 0 0.00 0.00 0.00 0.00
90 35 32 33 34 3.28 1.76 2.90 2.30
99 71 67 68 69 6.66 3.66 5.88 4.71
100 15869 15869 15869 15869 1.49E3 861 1.35E3 1.08E3
# flux from 2.16E-5 sr ( 1.51E-7 sr/4px) is 0.00150 lx (points with luminances over 25 and below 5.0E2 )
# Fuji Devignetting: 2 # dark frame dark/5119.pgm subtracted from all values
# Red average=1088.0 minimum= -137 maximum=15869 over 15850: 765968 zero: 1.4 %
# GrUp average=1041.1 minimum= -133 maximum=15866 over 15850: 765969
# GrDw average=1140.9 minimum= -140 maximum=15866 over 15850: 765968 zero: 4.9 %
# Blue average= 330.0 minimum= -128 maximum= 7310 over 15850: 765965 zero: 3.4 %
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5119.pgm -sm100 -nh -L25 -U500 -i 5143.txt -e 5143.eps -n 5143.ppm -t 118 -s71:76 pgm/5143.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.