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Messages - pscammp

Pages: [1] 2 3 ... 8
1
General / Re: Any new advice for monitor choice?
« on: 2018 February 22 07:33:12 »
Hello there,
    It really doesn't matter how big or what '*K' a screen is, if your using Pixinsight or any other Pro editing package and you want accurate colours etc then
you really need a colour calibrated monitor.

I personally use an Asus ProArt 24" screen (PA248QJ) and a 'ColorMunki Display' to calibrate it. Absolutely beautiful screen, and, unlike 90%
of screens mainly designed for pro image editing, this one has a screen refresh rate of about 8ms so it's also super duper at gaming too which
is another of my hobbies. Some pro monitors refresh rate is 114ms which would completely die when gaming !

Mind you, if your playing in the region of 47" then you're going to need a large mortgage to get a Pro screen at that size if they even exist so that kind of kills
that conversation from the start does it not ?   LOLOL

Anyway, take a look at this site and the links in the replies as it looks like it's right up your street and may help you get your head around the key features you
need to look out for in a UHD TV to make it really useful for image editing:

https://www.dpreview.com/forums/thread/3959551

Remember also, if you find what your looking for in a TV then be aware that your graphics card will also play a big part in what you get on the screen. If
for example you had a TV capable of displaying 100% of the sRGB gamut but your graphics card can only output 70% of it then....You see the point ! Also,
the higher the resolution you output from the graphics card the bigger the possibility that colour accuracy may degrade as a side effect. Spend a bit of time
doing your research and your end result will be more satisfying.

Good Luck with your search

Paul

2
General / Blink Problem !
« on: 2018 February 10 04:39:23 »
Hello all,
    When I use Blink and load all the images from 'X' folder for viewing it defaults to using a STF with linked colour channels, I click the button to unlink
the channels and then I can view the images without the red colour bias my Camera produces (non calibrated Lights used here).

When I step through the images one by one they get darker and darker until it looks like no STF is applied at all. As soon as it comes back to image one
I get full STF again only for the images to darken again as I step through them.

It does this with all the sets of lights I have got so it's not just a particular set of lights being affected.

If I click the button in Blink to apply an actual stretch rather than the STF then all the images look the same brightness as I step through them.

Does anyone know what is happening here, does anyone get the same issue  ????

Many Thanks
Paul

3
General / Re: PRINTING!!!
« on: 2018 February 02 13:19:15 »
Hey,

Just seen your new post  !

If you original resolution is 3294x 2454 then at 300dpi you would get an image as is at 10.98 x 8.1 inches

That's bigger than mine    lolol   :P

Further, if you introduce Drizzle integration into you workflow then your resolution becomes 6588 x 4908, and
you may even get better rounded stars in the bargain. This then would give you a print size of 21 x 16 inches
at 300dpi without resampling at all  ! ! ! 


4
General / Re: PRINTING!!!
« on: 2018 February 02 13:13:50 »
rdryfoos,

Not sure what the resolution of your camera would be at 8.3 megapixels but lets use a hypothetical resolution....

Lets say your camera has a resolution of 2500 x 1500 (for example)

If your image file has 72dpi imbedded in it and you send it to the printers, and, they print your image as is, this is what you'd get:-

A print which is 37.7 x 20.8 inches......HUGE and really expensive, and, it will look pretty rubbish unless you stand well away from it.

On the other hand, if your image file at 2500 x 1500 resolution has 300dpi embedded in the file and you printer prints it, you'll get this:-

A print which is 8.3 x 5 inches......And it will look quite nice close up but there may be a little softness to it close up.

If you want to go as far as 600dpi if your printer can do it, this will give you much more detail than the 300dpi option but you will get this:-

A print which is 4.1 x 2.5 inches......The detail in the image close up will be sharp as a knife but you'll need a magnifying glass to see it properly.

If you want a good quality print then the minimum has to be 300dpi, PI has a module for embedding this into the file, 600dpi will be sharper
but the image will be much smaller as a result. Its a trade off between how big you want your image divided by how sharp you want it to look.

Resolution / dpi    =    2500 / 300    =    8.3 inch print

Obviously the higher the resolution your camera is, the bigger the print at a certain dpi you can get away with. Also another option, if you were
to use Drizzle Integration at a factor of x2 then this would double your resolution, thus, doubling the print size you could get at the same dpi.

I recently sent my very first test print to a local printers of M33 set to sRGB and 300 dpi using PI's tools and I got a really nice result back at
9 x 6 inches. Yes it was a little soft compared to the screen but only very slightly but im chuffed as hell with it, so was the MRS   Wooo Hoooo

EDIT: By resampling the image it will look even softer than the original due to interpolation of the pixels but you WILL get a bigger image yes

Hope this helps a bit
Paul

5
General / image integration Question !
« on: 2018 January 28 09:11:57 »
Hello All,
    I have a question regarding Image integration if you don't mind......

When doing the final integration I use Linear Fit Clipping and I also use a preview to play with the High and Low sigma sliders to get the best noise result I can.

The question I have is not so much to do with the final integration but more to do with integrating the Biases and Darks etc.

Based on this tutorial:

http://www.pixinsight.com/tutorials/master-frames/index.html

The tutorial suggests using Winsorized Sigma Clipping for the darks and biases, is there any real benefit from also playing with the high and low sliders using a
preview to get the lowest noise in these calibration files, or just let it run at default values   ????

Many Thanks People
Paul

6
General / Re: Recommended Video Card and Amount of Memory for PI
« on: 2018 January 27 09:11:07 »
Ow RickS,

THREADRIPPER ! ! !

Give me the Gen sir if you please

What's your first impressions on your Ripper system  ?

I'm seriously looking at the ThreadRipper for my future system, whats it like, not just with PI but everything else too

Many Thanks
Paul

7
Image Processing Challenges / Re: Gradient Problem
« on: 2017 December 30 09:24:31 »
Model Parameters -> Tolerance 9.7

 :surprised: :surprised: :surprised:

Wow, I had no idea you could go that high for tolerance !!!

Also, I see samples on the nebulosity around the Horse, I didn't think you could put samples on Stars, Star Halo's or Nebulosity  ????

Paul

8
General / MERRY CHRISTMAS EVERYONE !
« on: 2017 December 24 15:30:55 »
Hello all,

I'm in the UK and I just want to wish the whole PI community a.....

VERY MERRY CHRISTMAS

Wooooooo Hoooooooo

Many Regards
Paul

9
General / Re: Preparing a file to be printed at a local printer
« on: 2017 December 19 04:51:58 »
Rob

sRGB IEC61966-2.1  is the common ICC profile used for images posted to the internet but wont give you good results if you send it to a printer,
generally printers will use sRGB or one of the wider gamut's like AdobeRGB if they have the capabilities to do so. sRGB appears to be the most
common from a quick search for printers here in the UK although I have no doubt there will be lots that do the higher quality gamut's.

AdobeRGB ICC profiles are available for download from the Adobe site if you do a Google search, once installed, they will be available in PI's
colour management to pick from.

If you are going this 'Printing' route then it is a must to get a monitor colour calibrator to get you monitors colours, brightness and contrast set up correctly.
I got a 'Colormunki Display' for my monitor. The monitor rendition very closely matches the test print I got back from the printers so I was well happy. Cheap
monitors are probably going to have problems calibrating correctly due to them not being capable of displaying enough colour variations, I had this problem
so I have invested in an ASUS 24 inch ProArt monitor which supports nearly 100% (if not 100%) of sRGB, and, it does gaming very impressively too.

When colour calibrating your monitor, it will end up shockingly dim as most people are so used to having their screens overly bright without realising it, so much
so that I got the ColorMunki to make my screen overly bright at 140 cd/m2 whereas the recommended setting is more like 100 - 120 cd/m2. When I compare my
test image to the screen (image being viewed inside PI) it is clear that the screen rendition is a little brighter due to me forcing the extra brightness so I'm going
to have to go back to the beginning and calibrate my monitor going along with recommended settings and I'm sure I'll be smack on.

It doesn't take long for your eyes to adjust to a monitor which is calibrated correctly and what you see on the screen in PI will be almost exactly what you get back
from the your printers.

Very Satisfying   :D

Paul

10
Release Information / Re: New in PixInsight 1.8.5: FrameAdaptation
« on: 2017 December 17 06:53:07 »
I wonder when Juan will be ready to release the tutorials he talked about for this tool and PCC

???

11
General / Re: Internal Reflection
« on: 2017 December 12 08:44:42 »
I was getting nasty reflections like this from bright stars due to my IDAS P2 LP filter screwed on the front of my camera, same colour too.

Tried everything to get rid of it but to no avail  :-[

With Juan and the team regularly working miracles in PI it would be so nice if they could come up with a tool to attack artefacts like this,
after all, the reflection in your image defiantly qualifies as a large scale structure of sorts.

I wonder if it would be possible to isolate the reflection in one of the layers produced by 'ExtractWaveletLayers' if you ran the script on split
colour channels   ???

My reflection only shows up in the green and blue channels, nothing in the red what so ever, can something be done in this situation maybe  ???

Only the big men on campus will know !

Paul

12
General / Re: How do I correct the "Missing ICC Profile" error?
« on: 2017 December 10 02:47:23 »
Mike,
    Try enabling the checkbox for 'Embed ICC profiles in Greyscale images'

After all, narrow band images are effectively Greyscale !

Not sure if this will solve your problem but it seems logical to try

Paul

13
Hello all,
    I was looking at a few images I have processed over time on my calibrated monitor today (not brilliant I might add - LOLOLOL - The Learning Curve !)

Anyway, what I noticed was that the backgrounds between them were all at a different brightness, although not by much it was still quite noticeable.

What I am wondering is how people go about finally setting the background brightness at the end of their processing so next time they process
a set of data they would do the same thing to that image too.

I would like to send my completed images to a printer so I can hang copies on the wall in one of my rooms, Wife's idea not mine   LOLOL  Bit like an inspiration
wall so to speak. It's going to be a bit weird if 2 images are next to each other and the star field of one is much darker than the star field of the other  !!!

So tell me peep's, what is the best way to establish a certain star field brightness for one image and to be able to reproduce the same on the next image I process.

Many Thanks
Paul 

14
General / Re: Dark smudge on DBE image
« on: 2017 December 03 04:15:25 »
John,
    Did you take Flats ?

Could be a dust bunny which Flats should take out completely

Paul

15
General / New images created !
« on: 2017 December 01 16:23:00 »
Hello all, hope skies are clear for you,

I have just got a new monitor which has a resolution of 1920 x 1200 which gives me way more screen real estate than my previous one which was (cant remember now, how MAD is that !) way smaller anyway.    :surprised:

So now when I have an image up on the interface, a comfortable size for me is 1:3 with 'fit view' applied.

If I use DBE for example, when PI produces the resulting image, it creates the result (and the map of what it has subtracted) at 1:1 which almost fills the whole monitor, some of which is behind the modules, like the DBE module, which I am using which I really hate with a vengeance    :o

Now I know with PI, there must be something I'm missing here in Preferences - What I would like is that any image created by a process be created at the same zoom value as the image I have just applied it to  !!!!!

Is there any way to constrain PI to do this   ????

Many Thanks
Paul   

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