DrizzleIntegration Example

Juan Conejero

PixInsight Staff
Sep 2, 2004
8,380
467
57
Valencia, Spain
pixinsight.com
Hi all,

The new DrizzleIntegration tool is almost ready for release. Just wanted to share with you the result of a test I've just run:


To the left, a normal integration of 47 undersampled wide-field images. To the right, the same images drizzled 2x with the new tool. Draw your own conclusions. This tool will be released in a few days.
 

Ghsmith45

Well-known member
Mar 3, 2012
923
7
Sydney, Australia
There are clear improvements in the star shapes and contrast, but is the background somewhat noisier? This is just a visual impression. Really looking forward to the release.
Geoff
 

mschuster

PTeam Member
Nov 27, 2011
1,137
6
San Francisco
Not sure what Juan implemented, but at least for classical drizzle there is a penalty of increased noise for improved resolution. On a per pixel basis, fewer subs contribute so per pixel SNR is lower. Another way to think about it is that the rejection ratio is higher. The resolution/noise tradeoff is fundamental.
 

jlake

Well-known member
Dec 14, 2010
430
0
mschuster said:
Not sure what Juan implemented, but at least for classical drizzle there is a penalty of increased noise for improved resolution. On a per pixel basis, fewer subs contribute so per pixel SNR is lower. Another way to think about it is that the rejection ratio is higher. The resolution/noise tradeoff is fundamental.
TGVDenoise to the rescue, eh?