This is more a question of usage than a technical question. I'm looking at image manipulation for a customer, we are trying to get an on screen representation of colour corrections which are being applied by print software. We have the values that are being used (e.g. R+50, G-20 etc) and are trying to apply them on screen using Magick.NET.
In GIMP, I can see that if I apply the same channel manipulation three times, once for shadow, once for mid-tone and once for highlights then I get the same result as the print software. I'm using magick.Level to try and achieve the same result but not getting there.
1) Is .Level the right method to use? Or should I be trying to change the colour balance through a different method?
2) If it is right, then I think I need to work out where to shadows/midtones/highlights ranges start and finish. Are they standard values for these, or do they need to be calculated per image? If calculated, how?
Hope that makes sense.
Thanks
In GIMP, I can see that if I apply the same channel manipulation three times, once for shadow, once for mid-tone and once for highlights then I get the same result as the print software. I'm using magick.Level to try and achieve the same result but not getting there.
1) Is .Level the right method to use? Or should I be trying to change the colour balance through a different method?
2) If it is right, then I think I need to work out where to shadows/midtones/highlights ranges start and finish. Are they standard values for these, or do they need to be calculated per image? If calculated, how?
Hope that makes sense.
Thanks