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Re: clavius in colour
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neil phillips is Offline
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Posts: 577
Join Date: Nov 2008
Default Re: clavius in colour - 28th November 2009, 02:23 PM

Thanks Brian i do have years of focusing experiance, going back to at least 1999 when i started imaging jupiter with camcorders. but webcaming only a few years.
And yes everything your saying about mono cams is the way to go, My petavius shot, i was shooting at 1/100 secs exposure, impossible with this camera on this night. but your comments about a good scope are the most important, and already after just two days me and this meade are like old friends.

So im not to dissapointed to lose the mono cam, I may try and get another mono spc as a stop gap, between getting another DMK. Setup time for my 12" is very bad, especially with the recent uk weather, so much so, that i hardly do astronomy anymore. Really a bad situation to be in. This meade lets me sneak in between the clouds and out again double time. Something im sure is going to up my imaging rate 5 fold.

Drift of the image is very bad Brian, registax 5 is not working properly on my system, i choose a referance frame and it either jumps to frame 1, or the last frame why i dont know, Any ideas Brian ?

as reg 4 doesnt do this. but reg4 doesnt like 5000 frames.
AVI stack does seem the way to go, but im lost on there presently. John h has given me a tutorial which i will use, and try and learn that software correctly. But ive been told that AVI stack doesnt like excessive drift, something i do have on this footage. But will experiment with johns advice.

So just to get a look at this avi, which i nailed focus on. I did a k3 ccd tools stack with a user defind LARGE BOX ( second shot here ) about 75% covering the intire page ( took ages ) then killed most of the missaligned frames, surprisingly k3 said 1300 was fine, so i went with that, a x2 stack, then histo down on k3, gamma down, then rgb balance and rgb align on reg 4.

A small amount of the top wavelet on reg 4 which produced a little bit of grain. So then to image analyzer and frequency domain filter. which killed all the grain ( but with no bluring ) then a little motion blur deconvolution, tiny amount of circular blur deconvolution. more frequency domain filter ( deconvolution causes noise to come back a little ) Then a very mild sharpen, watching the grain closely at abouut 300% image size,

On a 100% scale i droped the size 35% ( 50% drop being actual image size )
droped saturation a little, on exposure ( colour mapper on analyzer ) i dropped the blacks a touch, raised the brightness a touch. hey presto the recipe. Think its a fair go at it, but reg 5 and AVI stack will certainly be sharper.

Your thoughts please Brian, im always interested what others have to say, I learn a lot from others perspective and knowledge
Cheers Neil
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