Can't see cluster in non-linear saved jpeg or tif image

[CharlesW]

I imaged M71 briefly. Processed it a little in 32 bit floating and then did a Histogram Transformation so it's non-linear. When I save it as a jpeg or tif the cluster disappears and I'm left with an image showing very few stars. Would anyone mind telling me what I'm missed? I should mention that I reopened them in Gimp and Irfanview to see the results of the save as.

[Alejandro Tombolini]

Hi Charles,
The most probable cause is that you apply HistogramTransformation when a STF was applied (may be not a Auto STF).
Then be sure at the moment you save the image that the green line is not visible.
Saludos, Alejandro.