Specifying resampling in sat_sim

[Daniel Evans]

Hi all,

Is it possible to specify the resampling algorithm used in sat_sim? The documentation notes it uses bicubic interpolation, and I haven't spotted a setting that allows this to be altered. The inverse tool, mapproject, has a --nearest-neighbor option.

My use case is that I'm wanting to transform a pixel mask from "world space" to "sensor space". Bicubic interpolation has problems with under/overshooting with integer data, creating ringing artefacts around the masked areas. I'm therefore interested in trying nearest neighbour sampling instead.

(I think I could also do it by building an RPC model, then passing that into GDAL to do the inverse transform with whatever resampling I request, but I'd prefer to use the true camera model as I've got it available)

Cheers,

Daniel

[Alexandrov, Oleg (ARC-TI)[KBR Wyle Services, LLC]]

I looked a the sat_sim code. What you are asking is technically possible but would require extra interface code and other logic. I am rather reluctant to implement this as it appears to be a rather niche application. 

A workaround may be to perhaps resample the orthoimage mask with higher resolution (or the image from where the mask came), blur it to make it smooth, transform it to sensor domain, and threshold it back to 0 - 1 values. 

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Subject: [EXTERNAL] [BULK] Specifying resampling in sat_sim

 

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