New tutorial: Master Calibration Frames: Acquisition and Processing

[vicent_peris]

Hello,

just released a new tutorial about creating master frames for calibration. It explains several things I've learnt during the last 4 years about calibration. In fact, ImageCalibration does the image calibration exactly as I do it. In this article, I also explain how I obtain the master calibration frames.

I encourage to read it because:

- It will show you how to get the best of the new ImageCalibration tool. Good calibration is impossible without good masters.
- It will show you some practical uses of ImageCalibration and ImageIntegration tools. You will understand better some of the parameters in these tools.
- I think you will learn some new aspects about image calibration.

I plan to release in the near future an article about superflatting. For the moment, hope you will enjoy this one:

http://pixinsight.com/tutorials/master-frames/en.html


Regards,
Vicent.

[mmirot]

Nice Article Vincent.

Can you explain what clipping the upper range at .98 does?

Should it allway be this value?

Max

[Niall Saunders]

Yes - good work Vincent.

My question (not yet having had a chance to 'experiment' with IC and the new II) concerns the difference between the 'Sigma' and the 'Range' sliders in the new ImageIntegration module.

Is there a simple answer, or should I get home and read the ToolTips, and then start 'tweaking' to see if I can figure out what they do

Cheers,

[vicent_peris]

Nice Article Vincent.

Can you explain what clipping the upper range at .98 does?

Should it allway be this value?

Max

Yes - good work Vincent.

My question (not yet having had a chance to 'experiment' with IC and the new II) concerns the difference between the 'Sigma' and the 'Range' sliders in the new ImageIntegration module.

Is there a simple answer, or should I get home and read the ToolTips, and then start 'tweaking' to see if I can figure out what they do

Cheers,

Hi!

The range values will simply ignore saturated and zero pixel values, as they can't represent any physical data.


Vicent.

[mmirot]

That's what I thought. I imagine 0.97-0.99 should be optimal on the high end.

Do you save the outputs as 16 bit unsigned interger? 

Max

[vicent_peris]

Do you save the outputs as 16 bit unsigned interger?

No, 32 bit fp, specially if you take a bunch of bias and darks. HDDs are cheap. 


Vicent.

[Harry page]

Hi

I can not get your mouseover images to work !

Harry

[vicent_peris]

Hi

I can not get your mouseover images to work !

Harry

Wait several seconds until the image changes.


V

[Harry page]

Hi

I have tried that and still no joy the old tutorials work with mouse over 

Harry

[Harry page]

Hi Again

The side bar options do not work either    says error on page


Harry

[vicent_peris]

Hi

I have tried that and still no joy the old tutorials work with mouse over 

Harry

See the code of the webpage. The file names of the images are in the code, so you can download them and see in your computer. It's an alternative solution...


V.

[vicent_peris]

Hi Again

The side bar options do not work either    says error on page


Harry

What browser are you using?

V.

[Harry page]

Hi

I am at work so on IE 8 I know go get firefox    will try when I get home


Harry

[Niall Saunders]

Harry,

Try enabling the 'compatibility' mode of IE8 (i.e. the mode that makes IE8 'compatible' with every other browser on the planet).

It is useful when, like me, you are tied to some crazy IT department's notion of 'reliable software'

If possible, like me, change to Firefox, and never look back

Cheers,

[bitli]

I do not want to enter the browser war, but I have the same problem on Chrome.

Looking at the development console I have tons of:

Uncaught TypeError: Cannot set property 'src' of undefined

at en.html:164, 166, 168, ...

I seems not recognizing document['MO04'] in the mouseover event (or other images), although they are defined with the proper id.

--
bitli