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Messages - mcbbcn

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1
General / Re: Preprocess script error
« on: 2013 December 07 15:41:59 »
Hi Rob,

I just tried your process and it seems to work fine.  I've not been able for the flats to show exposure time in the Flats hierarchy tab with any of the methods (your method or my method) but at least, your method is a lot faster.

Thank you,

M.

2
General / Re: Preprocess script error
« on: 2013 December 07 15:22:18 »
Thanks Rob!

I did not know about that.  I can give it a shot.

I noticed a post from 2010 where TWADE user reported this issue, and Juan said that he was going to look into it, but probably he has so many things going on that perhaps, it never got done...

Here is the post...

http://pixinsight.com/forum/index.php?topic=1808.0

...& you are correct, although the information is no longer valid, it will make the running of the PreProcess script a lot easier with LRGB images.

Cheers,

Miquel

3
General / Re: Preprocess script error
« on: 2013 December 07 15:10:17 »
Adding this info manually from MaximDL into the fits headers, removes the warnings, but I still don't know why Pixinsight ImageIntegration removes this FITS header informmation....

Blue
EXPTIME    = 5.919 / Exposure time in seconds
FILTER     = 'Blue    '           / Filter used when taking image                 
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height

Green
EXPTIME    = 3.389 / Exposure time in seconds
FILTER     = 'Green    '           / Filter used when taking image                 
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height   

Red
EXPTIME    = 6.339 / Exposure time in seconds
FILTER     = 'Red    '           / Filter used when taking image                 
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height   

Luminance
EXPTIME    = 2.249 / Exposure time in seconds
FILTER     = 'Luminance    '           / Filter used when taking image             
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height   

H-Alpha
EXPTIME    = 19.72 / Exposure time in seconds
FILTER     = 'H-Alpha    '           / Filter used when taking image             
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height 

Cheers,

M.

4
General / Re: Preprocess script error
« on: 2013 December 07 14:27:44 »
I just learned a new thing...  >:D

All of this information....

EXPTIME    = 5.919 / Exposure time in seconds
FILTER     = 'Blue    '           / Filter used when taking image                 
IMAGETYP   = 'Flat    '           / Type of image
XBINNING   = 1. / Binning factor in width                       
YBINNING   = 1. / Binning factor in height   

...actually, it's is in the FITS headers after the sub-flats are created by MaximDL Skyflats assistance Plugin.
...furthermore, the information is still in each of the sub-FLATS there after I do the calibration with Pixinsight...
...BUT, once I do the ImageIntegration with Pixinsight all of this FITS header information dissapears....

Does anybody know why?

M.

5
General / Re: Preprocess script error
« on: 2013 December 07 14:00:59 »
OK, I just learned by reading a lot of posts, that the scripts needs

(IMAGETYP, XBINNING, YBINNING, FILTER, EXPTIME)

So, I guess the MaximDL skyflats plugin does not add this information to the FITS header, and I need to add it manually.  So, I need to look at the values and make sure I get them right...

Cheers,

M.

6
General / Preprocess script error
« on: 2013 December 07 11:16:47 »
Hi,

The only thing new about my process is that I'm using the Batch Preprocessing Script from an LRGB image for the first time.  I've been successfully able to create my flats & lights  in the past using the same process I'm using right now.

Here are screenshots of my lights, my flats, and the error I get...I assume that the script is not asking me to create a 300 second flat, right?  :P

...by the way, I use the MaximDL Skyflat assistant to create the flats...the only think I'm noticing with Harry's video is that between Binning 1 and above the name of the flat, he has one more identifier in the hierarchy like "G-Green 1.00", and then one more that says "11.00s", and then the name of the file.  So, I'm wondering if the MaximDL Skyflat assitance is not adding all the information I need in the Fits header for the script to recognize all the aspects of these flats.  Any thoughts?

Also, as Harry suggested in his video, I did an 'Add all files', and the script recognized those files as flats, and automatically set them in the Flats tab, and split them by filter...

Thanks for your help,  M.

7
No worries.  Perhaps Juan or somebody from Pixinsight can help...

M.

8
Wow!  I don't even know what is my endor password.  I have the activation code, the user/password for downloading the software through the /dist URL, and there is a 3rd password?  OK, so is that something that I should have gotten when I activated the software?  Because, I read and re-read the activation message a few more times, and I don't see anything about an endor password. umm....

OK, i just did some research and I see the email from Juan on May, 2012 regarding the endor account.  I've submitted an email to support@pixinsight.com and another one through the contact forms providing my email address, my user ID and requesting the creation of an endor account...

I'll wait and see if anybody responds.

Thank you for pointing me in this direction.

M.

9
Hi,

I sent a couple of emails to pixinsight support & I did not get any answers.  Then, I filled in the contact form, and I did not get any answers either, so I thought the forum gets quite a bit of visibility, so perhaps Juan or somebody can help me out.

Also, I read in the forum that if I get a checksum error while downloading the 1023 version, I'm using the wrong user/password.  But, if I put the wrong password, it's giving me a 'wrong user/password' error, and if I put my real password is giving me a checksum error

In addition, I tried my user and password at this site http://dist.pixinsight.com/ and I could login just fine, but when I use the user and password for the 1023 update, I get a checksum error.

Thanks for your help,

Miguel Casas
Portland, OR

10
Image Processing Challenges / Re: vdb142 - narrowband - have a try
« on: 2012 November 16 13:55:18 »
Well, I guess it was meant to happen.  Now, I'm embarrassed...  :-[

...but I'll do more than put the pixelmath values and I'll attach an RTF doc that contains the flow and the pixelmath values.

Just to give you some background on how I went about it.  I took a regular daylight image in PS, and I applied Cannistra's color balance.  Then, at the same time, I opened Pixinsight, and I started to play around with a Pixelmath formula that Juan just shared with me to control shadows, midtones & highlights.  So, when the Pixinsight image look close to the PS image, I annotated the values.

Then Cannistra uses blending PS modes, and as Gerald has a great page with the PS Blending modes formulas for Pixinsight & other programs, it was relatively easy to extrapolate some of the blending modes in Pixinsight using Pixelmath.

As you will see in the instructions, I had to do a bit of tweaking with Curves Transformation, but in the end, it came out pretty good color-mapping wise for an Ha & OIII bicolor combination.

My documentation is not elegant in any shape or form, and the Pixelmath formulas, some...I hard-coded the values, and some others I used variables...I'm sure it can be done in a much better way.

I spent quite a lot of hours doing trial & error to get the as close color balance as I could, but if you find a better way to do it, please post the results.  In the end, color mapping is like food & flavors, everybody is going to be right.  :)

See link to download the document: http://dl.dropbox.com/u/8971416/Cannistra_pix.rtf

Enjoy it!

M.

11
Image Processing Challenges / Re: vdb142 - narrowband - have a try
« on: 2012 November 15 22:13:39 »
Well, I tried to simulate the Cannistra method in Pixinsight, and I don't think it came out too bad, your thoughts are welcome...this is just a Ha & OIII combination...I was quite surprise, as you can see yellow stars, blue stars, red stars, and there is a bit a pretty good color balance...

If somebody asks me to share the method, I'll be embarrassed  :-[ because as Sanders pointed out, there is more alchemy to the Cannistra method than science...but hey, it's not too bad if you're looking for colors that a lot of people are used to see in OSC shots.

Cheers,

M.


12
 ;) Que bueno eres Juan!!!

I'm definitely not a taker for the fuzzy models  :-[ , but I really appreciate the information on the straight linear models.  It's quite a learning process and gratifying one.

I played a bit with Curves Transformation (CT) where I would overlap the Red signal and the luminance signal to get what an approximate result, so it totally resonates with me the tip on CT.

I was never too good with math, but I was not too bad with computer programming and the above expression, specially the 2nd half of the expression breaks down as follows (if I'm correct):

If L < a, then apply K1
elseif L < b then apply K2
  else apply K3
  endif
endif

Cool beans like the say in Oregon!  :P

Thanks again for all your help,

M.

13
Hi Georg,

Thanks for the PM reference.  I spent some time looking at it, and I found how to increase red signal but it's linear for the whole image, I don't seem to be able to split it by shadows, midtones & highlights...I'll keep researching, I'm sure something will pop up at some point...I'm sure there is some way to specify the intensity of the pixel under an iiF condition where the intensity will be something like if pixel value is less than this intensity (then it's a shadow) & then apply the signal increase...I'm sure there is a way to do it.

Best regards,

M.

14
Hi Georg,

I use HT all the time but I wanted to see if I could be more precised with my values and increase the red signal for the shadows 15%.  Where I use HT, I slide the midtones for the Red Channel but I can't I can't slide the shadows (left arrow of the HT) to the left as it's set to zero and this is one of the benefits of how this tool works.  Still, I wanted to check if I could push the boundaries by increasing the signal by a specific amounts for shadows, midtones & highlights separately and for a specific color channel.  If I can't do it using Pixelmath or any other Pixinsight tool, that is fine, I'm just exploring and learning what I can do with this system.

Thanks for your help,

M.

15
Hi,

As a newbie, there is always the potential that I'm asking the wrong question, but I have to give it a try.  :laugh:

If I wanted to increase the red signal by 15% in the shadow point of an image, what would the Pixelmath function look like?

Also, I would like to know what the pixel math formula would look like if I wanted to apply it to the midpoint or highlights of the Red channel.

Thanks in advance for your help,

M.

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