Please download the following | So that you can produce your own seatruth comparisons and illustrations. You get my 4SM-deglinted version of Ron's deglinted spectral image: -
U16, NO smoothing at all -
Using my new deglinted version of Ron's deglinted image yields distinctly better results -
Can you further "clean" your own version, or my new version, by some math gimmick? -
What's the commercial potential? Now I need to finalize the use of Stumpf's method. |
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 Final computed depth ZC |  SHOALS Lidar DTM |
 ZC-ZR using bands 1, 2, 3, 4 and 5 with strong thresholds on bands 4 and 5 Tide correction applied: 1.00 m all wavelengths at mid-waveband -cWL/0.500/0.500/0.500/0.500/0.500/0.500/0.500/0.500 -M/@001/@002/0003/004/005/@006/@007/008 -Lm/0001.0/001.0/001.0/010.0/010.0/010.0/255.0/255.0 -KK2_3_0.3500/Knir8.0/Bm400_BG510_GR628_RN700/mask_3 -Z/LAT1.00/N_2/land_2.0001/YXgreen025_022/z21/cZ1.00 -Smooth/5/D/smart+ 83.5% of computed depths are within +-2.0 m of DTM depth |  ZC vs ZR regression |
 Depths computed based on -
red band 5, 4, 3, 2, 1 -
yellow bands 4, 3, 2, 1 -
green bands 3, 2, 1 | ZZRegressor: Statistics of seatruth ZC-ZR on image waimanalowv2m_deg at Oahu, Hawaii N=5.609 millions pixels by Morel's 4SM method stepDTM=1 Smooth=1_5 Using_bands_1_2_3_4_5 cZ=1.00 1.79% pixels with depth underestimated by more than 5.0 m 4.17% pixels with depth underestimated by more than 3.0 m 6.78% pixels with depth underestimated by more than 2.0 m 13.71% pixels with depth underestimated by more than 1.0 m 35.68% pixels with depth underestimated by more than 0.0 m 25.91% pixels with depth overestimated by less than 1.0 m 8.15% pixels with depth overestimated by less than 2.0 m 2.27% pixels with depth overestimated by less than 3.0 m 1.16% pixels with depth overestimated by less than 5.0 m 0.37% pixels with depth overestimated by more than 5.0 m 61.60% of computed depths are within +-1.0 m of DTM depth 83.46% of computed depths are within +-2.0 m of DTM depth 92.51% of computed depths are within +-3.0 m of DTM depth 97.83% of computed depths are within +-5.0 m of DTM depth over a total of 100.00% of computed depths |
 Ron's deglinted image further Deglinted Color composite bands 2, 3 and 4 |  Water column corrected CC bands 2, 3 and 4 |
 Profile Yellow from South to North -
section D runs through polluted waters at 1.2 km and also from 2.1 to 3 km -
section C runs through polluted waters from 1.8 to 2.6 km -
section B is entirely in clear waters -
section A runs in polluted waters from 2.7 to 3.6 km |  Profile Blue from East to West -
section E is in polluted waters from 1.1 to 2.4 km -
section D crosses polluted waters from 1.5 to 1.8 km -
section C is in polluted waters from 0 to 1.7 km -
section B is entirely in clear waters -
section A is entirely in clear waters |