Closed CameronBodine closed 1 year ago
Made an attempt with commit referenced above. Output does not look right (see below). It may be an issue with the water column removal procedure. Another thing is that PyHum does the corrections with memory mapping. I'm guessing this allows the calculations to be performed across the entire scan at once. In my implementation, I am processing the corrections for each chunk separately. This may be why there are large differences in corrected intensities across each chunk. I'm moving on to other tasks and may return to this later, time dependent.
Variation in each chunk's intensity in above image is likely due to not rescaling pixel intensity based on global min and max.
Not sure why nadir is so dark.
Added new Empiracle Gain Normalization (EGN) technique to normalize sonar intensities by range and incidence angle. I found a description of the workflow in this abstract which is a functionality available in SonarWiz. I used these references to develop EGN workflow in PING-Mapper.
First commit: aab79ac Latest commit: 4e4806b
Results are extremely promising:
Functionality will be available in v2.0, coming soon. Closing as complete.
It would be good to get the sonar intensity corrections used by PyHum. This issue will be used to track progress.