Well, I find this a bit of a puzzle Peter. You go to this trouble to give prestigious resolution, but on zooming to M8 or M16, they are blown to hell. At full view it looks great, but isnt the point of a mozaic that it allows zooming and maintain the quality youd expect of an image of the object your zooming to?.....
Err. No.
The relative intensity relationship between objects needs to be accurate IMHO....hence I process the entire field at once after it has been stitched (a 64 bit processor and 8 gigs of RAM helps!)
Sure I could alter each object....but that would not represent the reality, particularly with very large field mosaics.
I think it's important to preserve these relationships, otherwise you might as well get the airbrush tool out and paint the entire scene
"The relative intensity relationship between objects needs to be accurate IMHO"........ why?, if it results in a compressed, blown, unappealing zoom experience?.
"Sure I could alter each object....but that would not represent the reality, particularly with very large field mosaics".... and reality is presented with a compressed dynamic range, detail free, blown zoom experience?, not.
"I think it's important to preserve these relationships, otherwise you might as well get the airbrush tool out and paint the entire scene"
No, thats a theoretical distortion of the "reality" of astrophotograhy, and a non sensical conclusion. The relationships cant be presented faithfully on present technology (my LCD, or my eyes for that matter). We process non-linearly precisely because of those limitations.
Attempting to maintain "reality" as you imply is a lazy copout, resulting in unasthetic "blown" results.
Don't mention stealing data. I've had a few rips, actually one of this image. Funny how you know the characteristics of your data.
Like the repressive war on Terror though, don't let them win by resorting to only posting low res images means they have won and the other 99.9999% of viewers lose out.
Whats the story behind that image extortion?
Mike
Last edited by strongmanmike; 08-07-2010 at 10:21 PM.
The relationships cant be presented faithfully on present technology (my LCD, or my eyes for that matter). We process non-linearly precisely because of those limitations.
Attempting to maintain "reality" as you imply is a lazy copout, resulting in unasthetic "blown" results.
I'd agree I could tweak the gamma curve somewhat better to display more information in the "interesting bits" .
But I'd still make the personal choice to make sure those tranformations are image wide, rather than localised ( ie. loss of shadow detail due display limitations being the likely result)
BTW zooming into a <50% quality .jpg is bound to disappoint. The fine structure in the original .tiff looks good to me... But I doubt anybody is going to thank me for putting a 100Mb into their browsers
"The relative intensity relationship between objects needs to be accurate IMHO"........ why?, if it results in a compressed, blown, unappealing zoom experience?.
"Sure I could alter each object....but that would not represent the reality, particularly with very large field mosaics".... and reality is presented with a compressed dynamic range, detail free, blown zoom experience?, not.
"I think it's important to preserve these relationships, otherwise you might as well get the airbrush tool out and paint the entire scene"
No, thats a theoretical distortion of the "reality" of astrophotograhy, and a non sensical conclusion. The relationships cant be presented faithfully on present technology (my LCD, or my eyes for that matter). We process non-linearly precisely because of those limitations.
Attempting to maintain "reality" as you imply is a lazy copout, resulting in unasthetic "blown" results.
Don't mention stealing data. I've had a few rips, actually one of this image. Funny how you know the characteristics of your data.
...
Humm.. come to think of it, I saw a really big mosaic on SBIG users recently that looked a little too similar to the above and a somewhat doubtful time-frame quoted to get the data.
by resorting to only posting low res images means they have won and the other 99.9999% of viewers lose out.
LOTS OF southo tonight huh? 
Are you gonna mosaic to the pub? 
...you eagle eyed Hellenic 
, and I dont recognise the bottle at all, ive never seen a full one 
