Post-process "cloning"?
Posted: Sat May 31, 2008 4:53 pm
Greetings from BobV! New poster -- but longtime APOD fan -- here. (The APOD Archive URL "lives" in my favorite bookmarks bar...)
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I agree that this full Carina photo is one of the most spectacular and beautiful HST images -- ever! However, this one has a couple of places that make me wonder if the post-processing includes "image repair" using something like the Photoshop "clone" or "rubber-stamp" tool.
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In the full image, about 25% up from the bottom, and barely to the left of the centerline, there is a "stack" of parallelogram-shaped regions that look much like the results of "cloning" to me:
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<img src="http://www.microlith.com/APOD/CarinaCloning%3f.jpg">
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...possibly to "fix" a data-dropout or non-imaged section.
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There appears to be at least one other example in this image. Is this my imagination?
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I would not expect image data modification in HST data released for scientific purposes. OTOH, does anyone know if the HST Team might "repair" a gap in the data -- for public display images only?
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Administrator/Moderators: I am (as "BobV") a long-time "netizen" (since the "EIES" network at NJIT, ca 1980). As you can see, I am reasonably facile and disciplined in the in-forum use of HTML. Please enable my use of HTML in this forum, if you will... Thank you.
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BobV
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~~~~~~~~~~~~
<P>
I agree that this full Carina photo is one of the most spectacular and beautiful HST images -- ever! However, this one has a couple of places that make me wonder if the post-processing includes "image repair" using something like the Photoshop "clone" or "rubber-stamp" tool.
<P>
In the full image, about 25% up from the bottom, and barely to the left of the centerline, there is a "stack" of parallelogram-shaped regions that look much like the results of "cloning" to me:
<P>
<img src="http://www.microlith.com/APOD/CarinaCloning%3f.jpg">
<P>
...possibly to "fix" a data-dropout or non-imaged section.
<P>
There appears to be at least one other example in this image. Is this my imagination?
<P>
I would not expect image data modification in HST data released for scientific purposes. OTOH, does anyone know if the HST Team might "repair" a gap in the data -- for public display images only?
<P>
~~~~~~~~~~
<P>
Administrator/Moderators: I am (as "BobV") a long-time "netizen" (since the "EIES" network at NJIT, ca 1980). As you can see, I am reasonably facile and disciplined in the in-forum use of HTML. Please enable my use of HTML in this forum, if you will... Thank you.
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BobV