Search found 20 matches

by BrendanC
Sat Sep 26, 2020 11:10 am
Forum: Software Troubleshooting
Topic: Very slow convolution
Replies: 7
Views: 344

Re: Very slow convolution

Much better - down to about 1.5 minutes now. Great to hear. The improved processing speeds using the GPU are why I upped the quality and (more) brute force number crunching in 1.7. There is so much more you can do with more processing power! Expect this to get cut down drastically with even a modes...
by BrendanC
Fri Sep 25, 2020 12:06 pm
Forum: Software Troubleshooting
Topic: Very slow convolution
Replies: 7
Views: 344

Re: Very slow convolution

Hi Ivo, I'm running StarTools 1.7.417 alpha, using 4 logical CPU cores. I did wonder about the number of iterations but that doesn't make a huge difference. Which of the decon algorithms should be fastest? If you could let me know, then I can take a look and play around with iterations etc to see wh...
by BrendanC
Thu Sep 24, 2020 7:14 pm
Forum: Software Troubleshooting
Topic: Very slow convolution
Replies: 7
Views: 344

Very slow convolution

Hi, I've noticed since the latest v7 that convolution takes ages. I mean, just previewing a postage-stamp size of image, it's taking 4 minutes to process, same with the full screen. My machine isn't high-end but it's good for everything else I've thrown at it (Lenovo T440P, 8GB RAM, 2.5GHz i5 CPU). ...
by BrendanC
Mon Sep 07, 2020 6:21 pm
Forum: Image Processing Troubleshooting
Topic: Would someone mind please checking my flats?
Replies: 4
Views: 273

Re: Would someone mind please checking my flats?

Great advice, thank you again Ivo. :)
by BrendanC
Mon Sep 07, 2020 1:16 pm
Forum: Image Processing Troubleshooting
Topic: Would someone mind please checking my flats?
Replies: 4
Views: 273

Re: Would someone mind please checking my flats?

Hey Ivo, thank you so much! I've been relying on the Canon's AV setting too much, I think. Time to start doing this manually with more attention paid to the histogram. My reason for using AV mode was actually based on the advice on that AstroBackyard page you recommend: "Luckily for DSLR astrophotog...
by BrendanC
Mon Sep 07, 2020 8:18 am
Forum: Image Processing Troubleshooting
Topic: Would someone mind please checking my flats?
Replies: 4
Views: 273

Would someone mind please checking my flats?

Hi all, I'm not even remotely sure I'm doing the right thing with my flats. I've tried two methods: one with the laptop white screen against the scope, using a Flats plan in APT; and one with the same method, but using a white t-shirt between the laptop and scope. However, I have zero idea whether e...
by BrendanC
Tue Jul 14, 2020 8:52 am
Forum: General Discussion
Topic: Super quick question: why not drizzle?
Replies: 5
Views: 841

Re: Super quick question: why not drizzle?

Brilliant. Thank you again Ivo. :)
by BrendanC
Mon Jul 13, 2020 7:29 pm
Forum: General Discussion
Topic: Super quick question: why not drizzle?
Replies: 5
Views: 841

Re: Super quick question: why not drizzle?

Looks like this gives me my answer: https://astronomy.tools/calculators/ccd_suitability - I'm just about ok with good viewing.

So, no drizzle then!
by BrendanC
Mon Jul 13, 2020 9:01 am
Forum: General Discussion
Topic: Super quick question: why not drizzle?
Replies: 5
Views: 841

Re: Super quick question: why not drizzle?

Hi Ivo, OK, maybe that was a gross oversimplification! I guess drizzling is good under certain circumstances - for example this page gives the main criteria for when it's worthwhile: https://www.astropixelprocessor.com/community/main-forum/drizzle-for-mono-cameras/ (Having said which, I still don't ...
by BrendanC
Sun Jul 12, 2020 9:06 pm
Forum: General Discussion
Topic: Super quick question: why not drizzle?
Replies: 5
Views: 841

Super quick question: why not drizzle?

Hi, Subject title says it all really! Now that I've started dithering to remove walking noise from my images, I thought best practice was then to drizzle in DSS. However, I've come across numerous recommendations NOT to drizzle for StarTools. I'm just curious: why is this? That's all! :) Thanks Bren...