Search found 15 matches

by N_DD
Mon Sep 28, 2020 9:35 am
Forum: Image Processing Troubleshooting
Topic: Help on LRGB+Ha image
Replies: 3
Views: 263

Re: Help on LRGB+Ha image

:shock: ...is THAT coming from my data?!?! :bow-yellow: Thanks a lot!!! Actually I acquired luminance on the second night by mistake... made a note to myself to double-check the filter settings before shooting a sequence... I am now trying to at least reproduce your great results. Did you use the la...
by N_DD
Fri Sep 25, 2020 10:52 am
Forum: Image Processing Troubleshooting
Topic: Help on LRGB+Ha image
Replies: 3
Views: 263

Help on LRGB+Ha image

Hi, I acquired a set of LRGB and Ha on NGC 6888 (Cocoon nebula). The total exposure is around 2 h for Ha and L, and 20 to 30 minutes for R, G, and B. Everything is calibrated with flats, darks and bias (I have acquired the data over two nights, and unfortunately I have rotated the camera in between....
by N_DD
Fri Jun 03, 2016 7:52 am
Forum: Software Troubleshooting
Topic: Curious about deconvolution
Replies: 3
Views: 3323

Re: Curious about deconvolution

Hi Ivo, thanks: so I should start with a Radius which corresponds roughly to 1.5"-2" to be in the ballpark of seeing induced blur, isn't it? In my case, imaging at 0.92 arcsec/pix, this would mean 1.6 to 2.2 pixels... if I bin the image, I would end up with a Radius which is less than one pixel! Doe...
by N_DD
Thu May 26, 2016 8:43 pm
Forum: Software Troubleshooting
Topic: Curious about deconvolution
Replies: 3
Views: 3323

Curious about deconvolution

Hi, (not sure this is the right forum to post my question...) I was wondering if there is an optimal setting for the Radius parameter (Decon module) linked to the image scale (arcsec/pixel) and seeing for deconvolving an image. If I am not mistaken, the Radius should somehow control the size of the ...
by N_DD
Wed May 20, 2015 12:08 pm
Forum: Image Processing Troubleshooting
Topic: Help with Wipe, Develop
Replies: 13
Views: 8745

Re: Help with Wipe, Develop

Thanks Rowland! I've managed to register images in regim, now I am trying to compare the output with what I get from DSS. Using your script produces good calibrated images! And since I will be taking some forced pause from DSO photography (my latitude is 51 N, so no more real dark nights for ~2 mont...
by N_DD
Mon May 11, 2015 8:45 am
Forum: Image Processing Troubleshooting
Topic: RAW processing script - raw to tiff and master frames
Replies: 4
Views: 2553

Re: RAW processing script - raw to tiff and master frames

Hi Rowland,

I can confirm that everything works also on Mac OS X (Yosemite). I still did not try it on real data but I'll keep you posted!

Thanks a lot,

Nico
by N_DD
Fri May 08, 2015 11:57 am
Forum: Image Processing Troubleshooting
Topic: Help with Wipe, Develop
Replies: 13
Views: 8745

Re: Help with Wipe, Develop

Hi, it seems that my flats were not checked in DSS :oops: . Wipe did a much better job if flats were taken into consideration. Using both flats and darks and averaging stacking leaves unfortunately traces of the hot pixels in the final image. Switching to kappa-sigma improves the outliers rejection,...
by N_DD
Thu May 07, 2015 12:37 pm
Forum: Image Processing Troubleshooting
Topic: Help with Wipe, Develop
Replies: 13
Views: 8745

Re: Help with Wipe, Develop

Hi! Ivo: thanks for your suggestions! I will try averaging and see if I can improve the results. I'll let you know. Rowland: I still have my dark library around and can see if including darks in my workflow will improve the final stacked image. I was also playing around with regim, but I could also ...
by N_DD
Thu May 07, 2015 7:27 am
Forum: Image Processing Troubleshooting
Topic: Help with Wipe, Develop
Replies: 13
Views: 8745

Re: Help with Wipe, Develop

Hi, thanks a lot for the feedback! Rowland: I tried stacking the original CR2 files, but it seems that DSS applies some kind of color-balance to the results, making it very difficult to process the stacked image (there was a thread here on the forum some time ago, and Ivo suggested to convert CR2 to...
by N_DD
Wed May 06, 2015 8:50 am
Forum: Image Processing Troubleshooting
Topic: Help with Wipe, Develop
Replies: 13
Views: 8745

Help with Wipe, Develop

Hi, I am having a bit of troubles removing vignetting from my images: I am using a modded Canon 1000D, and before stacking (DSS) I am converting the subs, flats and bias to linear TIFF by using DCRAW. However, when I try to remove vignetting I end up either with either too few removal, or if I incre...