![]() TCC logarithmic enhancement | ![]() FCC logarithmic enhancement | ![]() TCC deglinted same logarithmic enhancement "Glint" actually is caused by variable atmospheric path | ![]() FCC deglinted same logarithmic enhancement "Deglinting" efficiently removes variable atmospheric path, thanks to excellent correlations between NIR band and all other HICO bands: see glint regressions text file |
![]() Special effect mask This is prepared automatically. Note that threshold on deglinting leaves some critical area not-deglinted; therefore, threshold should be upped a bit. Lands and Clouds are mapped automatically by the AutoCalibration process, with some manual editing through shapefiles. | Image preparation and AutoCalibration is comprised of the following steps:
![]() The AutoCalibration diagram The proposed AutoCalibration command line now needs attention: changes are to be fine-tuned to suit the real life image calibration case. |
![]() Calibration for bands blue=7, green=13, red=22 and NIR=28 | ![]() Calibration for bands blue=7, 12, 21 and PAN |
All combinations of bands must be investigated, in order to fine tune the simplified radiance transfer model In 4SM, other than Jerlov's table of diffuse attenuation coefficients for irradiance 400-700 nm for marine waters, no "field" data is used in the process of calibrating any shallow scene |
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lsihico_20101123_m0.sig textfile![]() Deglinting along Profile Red |
No smoothing applied: this shows the real amount of noise See Profile Red locator
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