09-23-2017, 05:34 AM
The method will depend on the actual image. Can you post the image (or a representative crop if the image is large)?
Some info on posting images here:
https://www.gimp-forum.net/misc.php?action=help&hid=11
Some info on posting images here:
https://www.gimp-forum.net/misc.php?action=help&hid=11