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Messages - tgervais

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General / Arrange Icons
« on: 2017 April 04 08:24:13 »
WhenI right click on the screen - I see in the list of items that -  arrange icons is greyed out.
How can I turn that feature back on..

General / bring two images together
« on: 2017 March 26 09:54:20 »
I need some guidance here.  I have an image of the sky showing the stars all perfect.
I also have another image of the same part of the sky but with an image of a comet that I tracked.
The two images can't be put together because of the tracking of the stars being different than the comet.

How do have that beautiful comet sit in the middle of the beautiful sky with alll those nice stars.

Must be a way.

Thanks for any guidance.

General / Color for M42
« on: 2017 February 21 05:57:42 »
What is the key method in trying to get the red color in M42.

I have worked M42 for some time now and I only see a blue or white color.  Maybe brown.  But no red.
Examples of what M42 should look like show lots of red around the center.

Perhaps there is one feature of pixinsight that will do that for me.

General / Re: Jpeg image
« on: 2017 February 09 15:57:23 »
You are right on with your thoughts on moving the linear image over to non-linear.
Worked like a charm when I  dragged  the STF box from the Icon onto the histogram box and then applied it to the image..

I guess I knew that I could do that,  but somehow it didn't jump up and bite me..

Thanks for your help guys..

General / Re: Jpeg image
« on: 2017 February 06 07:07:05 »
OK.  I have disabled STF and I get a blank/black image.  So I used HistogramTransformation and curves etc to get some sort of a picture.  Not as good as it was when it was a linear image.  Here is the Jpeg now.  Finallyy I have a jpeg that is not black..

General / Re: Jpeg image
« on: 2017 February 05 14:55:45 »
Thanks again.

Tell me - how do you make the image non-linear?   I mean,  after it has been worked on and dressed up and made beutiful in linear mode,  how do you convert that to non-linear and not lose all your work??

I know how to save a non-linear to jpeg.  That is not my problem.  I want to save a beautiful linear image to jpeg without having to go through non-linear mode?? 

Does that make any sense.??

General / Re: Jpeg image
« on: 2017 February 05 13:39:41 »
Thanks Geoff.  Your patience is appreciated.

I am just a newbie with pixinsight but trying to learn.  The saving of a file as a jpeg has something to do with it being linear or not.  I think. 
Not sure but I seem to think I read that in one of the tutorials.   If you are working with an image in linear mode than you can't expect to save that as you would a non-linear image.   Something like that.    And of course my images are all linear and when I take it out of linear mode I have no image left. 

If I want to view the image in non-linear mode  I have to run it through all the same processes that I put the linear image through.  And this is what I am trying to get around.

In other words,  when I get finished playingi with an image (in linear mode)  and I now want to save it as a jpeg - I can't .  I end up with nothing.  Or rather I end up with a non-linear mode which is nothing.

Perhaps some of this explanation might help you understand where I am at.   I just need to know that after you are finished polishing up an image ,  how do you save it as  a jpeg..??

General / Re: Jpeg image
« on: 2017 February 05 11:12:32 »
The image I am trying to save as a jpeg has had the full treatment of all the processes of pixInsight.
It has been stretched, it has had pixmath applied along with starmask, and multiscalemediantrasform, Rangeselection, HDRmultisaletransform, and exponential transformation.

Now - I need to save it as a jpeg and not a tiff or something else.

How can I do that with the saved image coming out in color or being the exact same image that I am lookiong at when in pixinsight??

General / Jpeg image
« on: 2017 February 04 17:17:04 »

I want to save an image I am working on which is a color image,  and I want to save it as a jpeg file.
I saved it as a jpeg only to end up with a black and white image very low in contrast .  It needs to be worked on to get it to be like my color image.

Is there a simple file that can make this into a color Jpeg image?   And an image that won't need any more work?

General / Re: H alpha and 'L' Luminance files
« on: 2017 January 22 09:15:49 »
if you want to make a proper L file from your RGB master, make sure to use the RGBWorkingSpace process to change your gamma to 1.0 and the luminance coefficients to 1,1,1 on the RGB image (apply the RGBWorkingSpace process to the RGB image), then extract L*. otherwise the L* you extract will be more heavily biased toward the green channel. you should then undo the RGBWorkingSpace process on the RGB image before you continue working on it.

another strategy would be to extract the R/G/B channels from the RGB master, save them, and then use ImageIntegration to create the L master by integrating all 3 of those channel masters. this is probably a better way to do it since by default the weighting of the channel masters will be by SNR.


Thanks Rob.  I think that might work.  I need something to work with while I follow the tutorials and this could be the way.

Thanks again for your input.  It really helps at this point in my learning of Pix Insight.

General / Re: H alpha and 'L' Luminance files
« on: 2017 January 21 17:51:47 »
Well thanks guys for the help and thoughts on this subject.

My problem is that I only have a DSLR camera which is what I am taking images with.   I have no filters etc..
And it is with these images that I am trying to use with Harry's Tutorials.  Maybe that is not a good thing.  But I thought if I could apply his lessons to what I have on hand,  than it means more.

So when Harry says to take your 'L' Luminance image I just simply use pixinsight to break down the color image I have into r g b and grey.
I follow the lesson using those files. 

I guess that may not be the right thing.  And probably will mislead me as the lessons become more difficult.  But at least the input that you guys provided tells me that I need to consider the proper layers and not to think about using a grey layer as I am doing.

Thanks again guys. 

General / H alpha and 'L' Luminance files
« on: 2017 January 21 13:08:39 »

I have been going through Harry's tutorial and looking at other postings as well - and Luminance files are mentioned a lot.
I am not sure what is meant when I am told to use my Luminance file.  Or my H alpha file. 

I am not completely lost though  because I think it is the 'gray' file that I get when I break down the colors .  I get a gray file and the R G B files.  Is the grey file the luminance file?

If someone could explain how to get a Luimance layer or / and a H alpha  file   it would be appreciated.

General / Re: flat Frames
« on: 2017 January 17 06:26:27 »
Thanks Duncan and others for you responses.

I have it figured out now.  It is a bit different than how I was doing it before. Now I will first determine the maximum exposure level of my setup making sure it is just at the maximum level and not more. And than from there chose the median figure or a figure just  over half of the total saturated value.. Something like 51%.

That certainly is different than how I was doing it before.  But it seems this is more logical.  I know that once I get into discussions on problem areas that it eventually will help me fully resolve my issues.

Thanks again guys for the input.

General / flat Frames
« on: 2017 January 16 08:29:07 »

I need some direction on how to properly make flat frames.

I have a commercially made box to use to make the frames so that is not the problem. What the problem is,  is what is the exposure for making these flat frames.

I am being told that the exposures will be the same as the light frames.  Along with same temperature and ISO..
If so,   that is easy to do and straight forward.

Others have said  NO..  You have to make your exposures such that you can see the vignetting produced my your camera in your image.   In other words,  you have to take a whole series of pictures until you are satisfied that the exposure will show clearly  the vignetting in your image.

I have also read other statements such as - you let the camera decide what the exposure will be??  I am confused with that statement.

So - this is where I am at.  I have been making up the flats simply by using the same exposure  as my lights.  But I am willing to throw  that out if that is wrong.

Any help would be appreciated.

General / Re: No color after using BatchPreprocessing
« on: 2016 December 26 06:30:52 »

I have the same problem. If processing is done using Star Alignment instead of Batch Processing - there is no problem with color.
I can't help with your problem because I have the same problem.  I was hoping someone had a solution to the problem.  Like a different setting in Batch Processing.

Fingers are crossed here that someone will come along with a solution.. 

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