Quote:
Originally Posted by Shiraz
no. however, there is a background in the DSS1 image that has roughly the same structure - attached image shows the DSS1 image and the low spatial frequency background that was extracted. My image has bright and dark bits in pretty much the same places and also shows a gradation in background, increasing towards the lower right corner.
I don't have the depth to get down to the fine structure that Rolf's wonderful image shows, but I tried a bit of enhancement and got generally similar line features and swirls etc. Not worth posting because I did a rough processing job on the stretched image and ended up with a lot of noise.
I guess the main question is whether the low spatial frequency structure is real and if its is, what it could be. I am still not sure, but originally left it in because I have never previously recorded any gradients that distinct (except when my mirrors once got coated in sea mist). Will have a close look at the optics and carefully inspect the subs - and if it turns out that I have a red herring, will reprocess - thanks very much for your help so far  . |
Yep, looks close enough to me too
...nice work Ray, comparing to pro results is often very useful (regardless of what some people think
) for varifying features and details and helping to rule processing artifacts out or real features in
Mike