More data to work with in the image allows you to change the format to a lower quality without losing to much of the quality. It all has to do with the Compression of the data in the image BMP less compression=very little loss of data, JPG high compression= greater loss of data.
More data to work with in the image allows you to change the format to a lower quality without losing to much of the quality. It all has to do with the Compression of the data in the image BMP less compression=very little loss of data, JPG high compression= greater loss of data.
Quote:
Originally Posted by ballaratdragons
ummm, right. OK.
Put in astro terms on planets, the bigger image (BMP) you see in the eyepiece the more detail you see, the smaller the image (JPG) the less you see
I just downloaded the vid. There seems to be some motion blur roughly along the 11-oclock direction... but I see no drift as the video plays.. I think anything dimmer than the dimmest of the 6 stars has been lost to compression noise.
My guess from looking at the video that there is no nebula at all in the data, just stars + noise. Any nebula you might bring out is just reprocessed noise. But I am just guessing after inspecting the frames from the video.
C'mon Asi, prove me wrong!
Ok. We have grain, we have noise, we have artifacts & we have NOT round stars!
As far as I know, the 'trap' is the very center of the nebula....The main 6 stars you see on a good night in most scopes, so in that case this image counts for nothing.
These 3 are at different stages of processing in registax.
I have yet to stack & process with the trap in mind.
Can someone verify total exposure time on this AVI....I make it 6.92 seconds.
It's written on the bottom right of the Avi program John. 11 seconds.
I know there is a lot of noise & NOT round stars, that's why I was hopig someone could do something with it, coz I can't. Bert found about 10 stars in the trap area when we looked on his pooter.
The Trap area is the immediate area in & around the 4 main stars at centre.
Wow Asi & Ken! That is impressive! I compared Asi's final version with a low-res Anglo-Aust scope shot I found without looking too hard and there is heaps of real detail in Ken's Toucam vid! I'm going to have to get into imaging!
ummm, right. OK. 
I think anything dimmer than the dimmest of the 6 stars has been lost to compression noise.
Oh No! Leave some for me, guys!!
