4SM Ikonos Heron Island

This image was copied to me already-deglinted by USF:
very bad deglinting ==>still very much needs deglinting.
I wish I had access to the original raw 4-bands image instead of this radiometric tuttifruti.
I lack seatruth depths in order to ascertain operational wavelengths
for Ikonos wavebands in 4SM.
Therefore, although the optical calibration seems quite straightforward,
depth results might very well need to be multiplied by a significant CoefZ correction factor.

Raw image BGR TCC histeq enhancement	Deglinted image BGR TCC histeq enhancement
As it reached us, this image was already "deglinted" by some unknown process which only removed the swell fabric of the glint this is why(?) the NIR band is not available but a lot of glint remains in the form of very high level of noise in all three bands	This noise is still fairly well correlated among all 3 bands therefore, it can be removed to a certain extent by 4SM this proved to be quite challenging, but efficient it involved quite some in-depth improvements of the deglinting process
image Z stepped	image Z
image B	image LBS normalized
image LBS: RGB true color composite	image LBS chequered




image WZ RED where 3-bands modeling was possible GREEN where onl Green/Blue modeling was possible	image WR illustrates the diameter, from 3 to 11, of the circular smart-smoothing window
	PROFILE ACROSS THE CHANNEL: Z and spectral LBS across the reef rim, through the channel, then across the next reef rim
SEAWEED_1: Z and spectral LBS green bottoms around pixel 1265 and pixel 1450 in a blue bottom dominated area of the lagoon topography is ~level at ~2 m	SEAWEED_2: Z and spectral LBS green bottoms from pixel 1300 to pixel 1540 in a blue bottom dominated area of the lagoon topography is ~level at ~2.5 m
PINNACLES 1: Z and spectral LBS left half is blue bottoms dominated right half is green bottoms dominated	PINNACLES 2: Z and spectral LBS right half is blue bottoms dominated left half is green bottoms dominated
	Optical calibration Oceanic IB water type of Jerlov: very clear waters fairly good calibration in spite of poor radiometric quality NIR band is not available mind bogging "deglinting"quasi-absence of bare land pixels
	Operational wavelengths for Ikonos visible wavebands at Heron Island are tentatively set to WLblue= 495.2 nm WLgreen=575.9 nm WLred= 667.4 nm WLnir= 780.0 nm