Ah, ok - would you mind linking us to the Infragram image, or uploading the original so we can try and compare ourselves? But for one, it looks like your python data may be rounded -- integer only! Could you try saving those as floats or decimals to see if you get more detail?
Public Lab contributor mrodriguezorejuela just asked a question entitled ' Infagram - Legacy sandbox formula':
Help them by posting an answer here: https://publiclab.org/questions/mrodriguezorejuela/09-11-2018/infagram-legacy-sandbox-formula
I am trying to reproduce in Python the processing capabilities of the legacy (webGl) version of the sandbox, as they give the desired output. The processing pipeline is composed of a red channel normalisation (R/G) + NDVI preset (in color mode).
I managed to get a 100% identical picture after the R/G step, but the NDVI one is extremely bizarre. I tried applying the general formula and other variants for color/mono but to no avail. I also tried to follow all the steps detailed in the infragram.js from the same site but nothing.
When the site gives me a more detailed, softer output.
Could someone enlighten me about the maths behind that specific version of the sandbox? Thanks.
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