Snímek 5115
|
|
| 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 19:14:40
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5115.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 0.003 s (1/320)
# 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)* 0.106
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -68 -69 -13.1 -7.23 -11.5 -9.27
10 -36 -32 -33 -34 -6.62 -3.45 -5.67 -4.56
50 0 0 0 0 0.00 0.00 0.00 0.00
90 36 34 34 35 6.62 3.61 5.84 4.67
99 74 71 72 72 13.6 7.60 12.0 9.70
100 9677 15935 15904 9352 1.78E3 1.69E3 1.56E3 1.72E3
# flux from 0.654*0.50 sr ( 8.59E-7 sr/4px) is 0.125 lx ( 0.262 lx tilewise);
# tilewise luminance 0.346 cd/m2 with rel. SD 538 % (summing pixels below 15850 and with non-zero green: there is 49.7 % of them)
# Fuji Devignetting: 1 # dark frame dark/5119.pgm subtracted from all values
# Red average= 2.3 minimum= -151 maximum= 9677 over 15850: 0 zero: 45.7 %
# GrUp average= 3.7 minimum= -137 maximum=15935 over 15850: 7 zero: 50.7 %
# GrDw average= 3.4 minimum= -146 maximum=15904 over 15850: 4 zero: 49.8 %
# Blue average= 2.0 minimum= -150 maximum= 9352 over 15850: 0 zero: 47.9 %
End of results of "raw2lum" (version 1.22) with parameters:
-c fuji -fa -d dark/5119.pgm -nh -nt -i 5115.txt -t 118 -s71:76 pgm/5115.pgm
Just points with luminances over 25 and below 1.0E3 cd/m2.
In grid tiles, flux densities from these points and tiles are given.
# Date/Time : 2006:02:24 19:14:40
# Resolution : 1280 x 960 in jpeg (1424x1076 in pgm/5115.pgm)
# Focal length : 5.7mm (35mm equivalent: 39mm)
# CCD width : 5.32mm
# Exposure time: 0.003 s (1/320)
# 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)* 0.106
# % R G1 G2 B readings R G B L / cd/m2
1 -71 -68 -68 -69 -13.1 -7.23 -11.5 -9.27
10 -36 -32 -33 -34 -6.62 -3.45 -5.67 -4.56
50 0 0 0 0 0.00 0.00 0.00 0.00
90 36 34 34 35 6.62 3.61 5.84 4.67
99 74 71 72 72 13.6 7.60 12.0 9.70
100 15935 15935 15935 15935 2.93E3 1.69E3 2.66E3 2.13E3
# flux from 3.83E-4 sr ( 8.59E-7 sr/4px) is 0.0673 lx (points with luminances over 25 and below 1.0E3 )
# Fuji Devignetting: 1 # dark frame dark/5119.pgm subtracted from all values
# Red average=1171.5 minimum= -127 maximum= 9677 over 15850: 765657
# GrUp average=1647.6 minimum= -114 maximum=15935 over 15850: 765664
# GrDw average=1690.1 minimum= -123 maximum=15904 over 15850: 765661
# Blue average= 988.8 minimum= -135 maximum= 9352 over 15850: 765657 zero: 1.8 %
End of results of "raw2lum" (version 1.21) with parameters:
-c fuji -ft -d dark/5119.pgm -sm100 -nh -L25 -U1000 -i 5115.txt -e 5115.eps -n 5115.ppm -t 118 -s71:76 pgm/5115.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.