Very interesting topic - thank you Sam.
I also did a test and compared drizzle integration (scaling x2) with 'normal' integration.
As per Rick's response, drizzled image had a slightly lower noise in the low signal / background areas. I compared standard deviation in small areas in two images and got about 15-17% decrease in the standard deviation. Total integration (3nm Ha) was over 12 hours.
There are a few screen shots for reference. Drizzled data is on the left.
The native image scale is 1.33"/pixel, while drizzle integration results in half of that (about 0.67"/pixel).
Suavi
|