Good morning all, The image I was working on was created by Nikon's ViewNX2 editor, the original image format was Nikon's raw image .NEF extension, I exported this as a TIFF and then imported it to GIMP.
In ViewNX2 the images are stored with a preview thumbnail, so I think you have hit the nail on the head, I got myself confused at first because I didn't notice the thumbnail in the image before I used the channel mixer. The image is an infrared photo, it's mostly sky and the thumbnail didn't stand enough for me to notice it. It's also so tiny that it can't be seen in the image layer page 1. After swapping The red and blue channels (not green, another mistake) the colours changed enough for the thumbnail to be obvious. I wrongly assumed that the channel mixer had created the thumbnail, in fact it was there all the time. Now I understand the problem I think I'll be OK, for a while anyway. I bought Klaus Goelker's book "GIMP 2.8 for photographers" last week, I'm working my way through it and thought I was doing OK, but I got myself too confused to sort this one. Before installing GIMP I read a review which said that GIMP was a very good program, but the learning curve was steep. I think they were right on both points. Thankyou for your assistance, I know what I'm going to be doing during the long winter nights. -- Oxonian (via www.gimpusers.com/forums) _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
