Results 1 to 2 of 2
  1. #1
    JohnP_1's Avatar
    JohnP_1 is offline HYPER GIANT
    Points: 59,268, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement365 Days+ Registered Achievement!20 Posts Achievement!Gallery Achievement!Album Achievement!
    Join Date
    Feb 2014
    Location
    Mystic, CT
    Posts
    4,358
    Points
    59,268
    Level
    100
    Thanks
    2,197
    Thanked 1,765x 1,630 Posts
    Blog Entries
    55

    Default gamma and contrast editing between Mac and PC



    I have read that Mac computers perform a gamma correction in their video cards whereas PC's do not. Where this becomes an issue is with images edited for cross platform use, such as on this forum.

    Does anyone have any experience with this that can provide input? I wonder if I set my Mac laptop monitor to "native" response if that would solve the issue I am having. I thought I was using a PC gamma of 2.2 already, but, I don't recall at the moment.

    Another possibility is that my PC experience is based on viewing such monitors under fluorescent lights, which I hate. I do all of my processing at home with much dimmer conditions in the background. (The laptop monitors are much sharper in my opinion.) I use a gamma preview in PS too that gives me limited success.

    I've attached an example of my last image that I processed that upon viewing on a PC I felt like I needed to tweak the gamma and contrast a bit.

    Thanks for any advice on this.

    The Eagle's Nest - Bortle 4-5 sky - scopes: Celestron C8 SCT w/MOTOFOCUS; ES ED102 APO CF MoonLite w/auto focus! FR/FF(s): Starizona SCT Corrector; Stellarvue 0.8 FR/FF; Explore Scientific 1.0 FF Filters: 1.25 inch - Orion Ha (1.25in), 2 inch - UHC, polarizer, Orion Sky Glow, Astronomik CLS-CCD Mount: Celestron AVX Cameras: Canon 60d (modded); Atik 383L+ OSC Guiding: Olivon OAG; ZWO ASI120MM; QHY QHY5-II Mono

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  2. #2
    absorbedpath's Avatar
    absorbedpath is offline Bright Giants
    Points: 8,722, Level: 64
    Level completed: 91%, Points required for next Level: 28
    Overall activity: 0%
    Achievements:
    5 Threads Achievement!365 Days+ Registered Achievement!50 Posts Achievement!2 Posts Achievement20 Posts Achievement!
    Join Date
    Sep 2011
    Location
    Allen, TX, USA
    Posts
    310
    Points
    8,722
    Level
    64
    Thanks
    9
    Thanked 86x 67 Posts

    Default Re: gamma and contrast editing between Mac and PC

    If you are processing images between multiple monitors or computers, you need an external calibration tool (I.e. Spyder pro). Personally, I recommend it even for single monitors. I had similar issues when processing and this was recommended to me. Glad I did it. I only use my Macbook pro to process, but often use an external monitor (Samsung) to multi screen.

    If you go this route, get something that supports multiple monitors. Just to give you a heads up, this includes a device that sits on your monitor as well as takes ambient light measurments. The sw, at least on the Spyder, is fairly intutive and does most of the work on its own. No more tweaking gamma or contrast.

    Hope this was helpful.
    Current setup:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    CGEM w/ Polemaster, Kendrick power panel, Celestron Starsense (big fan), ES 80mm ED F6 Apo &
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    F 3.9 Newt, JMI Motofocus w/PC control, Canon 60D with CLS clip LP filter, Orion & Lodestar X2 autoguiders with 50mm Orion mini guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    - my other hobbies are just as expensive as this one -
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  3. The Following User Says Thank You to absorbedpath For This Useful Post:

    JohnP_1 (02-25-2015)

 

 

Similar Threads

  1. Editing help!!
    By Bailey.Goodwin in forum Astro Imaging Forum
    Replies: 8
    Last Post: 01-09-2013, 01:19 PM
  2. Editing help!!
    By Bailey.Goodwin in forum Astro Imaging Forum
    Replies: 2
    Last Post: 01-08-2013, 02:33 PM
  3. Image Editing?
    By Celestron in forum Feedback Forum
    Replies: 1
    Last Post: 02-25-2012, 12:55 AM
  4. M42 as good as -I- can get in editing
    By crazy wrx in forum Astronomy Digital Cameras Forum
    Replies: 17
    Last Post: 02-07-2012, 12:19 AM
  5. Signature Editing...
    By John H. in forum Astronomy Beginners Forum
    Replies: 2
    Last Post: 11-17-2011, 03:12 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 12:50 AM.