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Old 05-09-2017, 01:39 PM
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sil (Steve)
Not even a speck of dust

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Join Date: Jun 2012
Location: Canberra
Posts: 1,474
Something I observed recently. I havent done anything much with APP recently, been working on projects with PI. I shoot nikon DSLR with an in body filter I reviewed elsewhere here. So my colours are out of whack in my subs as a result. Running a batch through PI's BPP script to produce a single integrated frame and stretching the colour cast is ugly and obvious. Can of course been removed and I do.

Same batch ran through APP to produce an integrated frame i chuck that into PI along side PI's and the APP one is clearly a good colour, no cast and stars etc look about right.

NOW, fire up PI's new Phometric Colour Calibration and hit the PI integrated frame and rest/autostretch it and now both integration frames are VERY VERY close. Damn this new PCC rocks!

More importantly APP is doing a more accurate colour calibration process by default without the plate solving etc. So again simplisticly I guess its 98+% colour accurate without any fuss while there are tons of options in PCC which may be better for certain data and targets (I left its default ). In PI I would say its slightly more saturated than APP, that might give APP the edge to be artistic with stretching and saturation but seriously it seems to be almost nothing between them. Again this is observational, not true testing. I just tried to make the best integration file from both programs before deciding which to use for the next part of the project. So I won't say any more but its great to see the integrated data has such accurate colour without the cast (light gradients are still present) I'll have to see if the result is the same with light polluted data, I'll try to keep it in mind.
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