Harry's video tutorials

[DB]

Hi Harry

I am using Equinox to image and use it for dark subtraction and LRGB conversion from a color camera.  Any advice about pre-processing of images, and automating the steps from channel extraction to producing a stacked image may be useful. 

Many thanks and all the best for the New Year.

regards

David

[Harry page]

Hi

I am not heard of equinox  I presume its a capture program with some calibration capabilities 

So you need to decided what you want to do in pixinsight if you want to calibrate your images in equinox and bring them into pixinsight you can just the registration and integration as per my video's
I suspect you are using a DSLR and if you are i would read this http://pixinsight.com/forum/index.php?topic=2570.0 done by mr Astropixel 

I do not quite understand a couple of things 1 ) a OSC camera creates RGB images not LRGB images  2) channel extraction is easy but why do you want to do it  there is no reason in pI to process each channel separately

Have a good new year

Kind regards Harry

[DB]

Hi harry

I am using an SBIG XCM2000 one shot color camera.  Equinox come bundled with it (for Macs) and controls the camera and G11 through the autoguide port.  The process is to capture the images, dark subtract and then convert to LRGB in equinox.  The individual color channel files are then combined in Image Integration in PixInsight and then move on from there.  I'd be happy to do everything in PixInsight after capturing the image.

regards

David

[Harry page]

Hi

I see that you are subtacting darks  are you using flats yet ?

I find it strange that the image files are saved in seperate files , I can not see the reason for this ,  you also keep using the lum word is are you getting a lum file as well ?

I am working on a calibration video now and should have it ready soon

Regards Harry

[DB]

Hi

I do subtract flats as well (but not always if I am being lazy).  As I understand it the LRGB files are saved separately, perhaps something to do with removing the Bader mask.  It certainly would be easier if the single file could be handled but would that allow processing of the luminosity separate from color?  Is there any tutorial on Pixinsight and single shot color cameras?

regards

David

[Harry page]

Hi

I think the lum you are getting is a seudo lum and will bring no new info to the party  ;Dand because of this there is nothing to be gained by processing the lum seperatley from the RGB 

All of my tut vids from the newbie section are from a OSC camera ( sxvf m25 ) 

Regards Harry

[DB]

Hi

Sorry to be slow about this.  To be clear, with a OSC camera image, you simply 1) dark/flat subtract, 2) star align and 3) stack images with Image Integration?

regards

David

[Harry page]

Hi

Yes as simple as that 


Harry

Hi

Sorry to be slow about this.  To be clear, with a OSC camera image, you simply 1) dark/flat subtract, 2) star align and 3) stack images with Image Integration?

regards

David

[Josh Lake]

Hi, Harry,

Because of your tutorials, I've really progressed with learning PI over the last month or so. One thing I see a fair bit is use of the Atrous Wavelet tool and I can see that it's very powerful for doing multiple things, even for creating masks. Do I have any hope of another great tutorial from the Astroshed?

Thanks. If not, no worries, you've been amazingly helpful.

[Harry page]

Hi

This was on the list to do at christmas 

Just been so short of time latley , but I will do it soon 

Harry

[DB]

Hi

Sorry to be slow about this.  To be clear, with a OSC camera image, you simply 1) dark/flat subtract, 2) star align and 3) stack images with Image Integration?

regards

David

Hi Harry

I wonder if you could advise a couple of things about the OSC workflow. Presumably the above sequence also requires a 'de-bayer' step to remove the grid.  Is it possible to do this batchwise? is there anything else in the sequence needed?  Lastly, do you know if there is any support material on one shot camera workflows?

regards

David

[Harry page]

Hi

Yes it should be
1) Dark /flat application
2) debayer
3) Alignment
4) Image integration

There is also a Batch debayer tool under scripts , also there is the new script to do all this in one go 

All my basic videos were created using a OSC camera  8) and even if you were using a mono camera and created a RGB this way there is no difference in processing

Regards Harry

[DB]

Excellent thanks.  I found that the 'superpixel' setting was required.  That seemed to work OK.

Another basic question - when it is debayered and integrated, it is recorded as a RGB file, yet it appears greyscale. Just an image (M83) with no color?

[Harry page]

Hi

I did a quick process of a lum image to go with the RGB one I did a while ago , showing how you combine them as well

Includes a look at my new favorite tool the LHE

http://www.harrysastroshed.com/Part2%20LRGB.html

Regards Harry

[georg.viehoever]

Another great tutorial! Thanks Harry! Even a seasoned PI user can still learn something. Will try the LHE tool as soon as possible 8).

One remark though: I would recommend to do a FormatConversion to f32 as a first step (you are using i16). In particular during the histogram stretches, I tend to see posterization when doing this in i16 space with my DSLR photos.

Georg