6949*5174 CASI image of Heron Island 
17 bands, UTM zone 56, ground resolution 1 m, collected July 1, 2 and 3rd 2002
Heron Reef data provided courtesy of the Center for Spatial Environmental Research at the University of Queensland.

Dataset provided by HyPhoon.com.

next to using a CASI Panchromatic band (march 2014)
4SM Demonstration using this study case (april 2014)
 
 
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Profiles
Modeling



     
Profiles

"SEATRUTH" is retrieved depth by University of Queensland

-ProfileAB/ZrvWb/profile_purple/DTM/chAB_3_7_13
All profiling and modeling was done through an edge-preserving smoothing scheme.

Profile RED

Location of Profiles
  • In the plot to the left:
    • Black is our retrieved Z4SM (smart-smoothing applied)
    • Red is U. of Queensland's retrieved ZDTM
  • The colored line at the bottom indicates the highest ranking band used:

Profile Green
  • Our retrievals appear to be ~20 cm shallower than the DTM: this sort of discrepancy stems from the very way depths are computed in 4SM.

Profile_Blue
  • This also shows the water column corrected profiles for Blue, Green and Red bands: some variations of the spectral signature may be noticed.
  • these hyperspectral signatures shall then be used forbottom typing.

Profile Yellow
  • Note that the DTM exhibits depths of 40 cm over the beach

Profile Purple
  • Agreement is excellent over spectrally neutral bottom substrates, along the boat channel






Modeling
Modeling of  the whole image runs for two hours.
All profiling and modeling was done through an edge-preserving smoothing scheme.

Modeling writes retrieved depth in centimeters
in a 16S channel_71

DTM subset from U. of Queensland
in a 16S channel_72

TCC 644, 547 and 479 nm
water column corrected
BOA, identical linear enhancement
Modeling writes a spectral water column corrected image:
in 17 U8 channels 54 to 70
TCC 644, 547 and 479 nm
raw, for a reference
BOA, identical linear enhancement



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