Dear Support Team,
I am currently using Paraview 5.6.0 to reconstruct the pressure field from a screenshot of a Slice filter. The screenshot is exported with SaveScreenshot().
The screenshots have been exported with the X Ray colormap, which has the same linear behaviour for all three RGB channels, so it should’t be difficult to read the exported .png pictures and reverse engineer the pressure at that pixel depending on the RGB value interpolation
However, I noticed the following problem: exporting a picture from paraview with the SaveScreenshot() function does not preserve the RGB channels that are set up in the ColorMap. I have also tried with a different Color Map (e.g. jet), and the value that is set for the red channel in the default colormap [0.5, 1, 1] gets somehow converted to another level of red ( I am double checking this by reading the image in different softwares). My guess is that it might be connected to the light rendering.
My questions are 1) if you know why this might be happening, and 2) if there is an alternative way to export the RGB Values on every pixel according to the actual ColorMap??
Thank you in advance for your support, please let me know if there is some missing information,