Search found 1370 matches
- May 11th, 2009, 5:14 am
- Forum: Picture Window Support
- Topic: RAW sidecar files and silent overwriting
- Replies: 4
- Views: 5237
RAW sidecar files and silent overwriting
When a RAW file is opened in RAW dialog, clicking OK/Apply will create a sidecar-workflow file, which stores all the RAW developing parameters. This is great, since it makes the RAW developing parameters reproducible (i.e. one can develop a system, keep all the RAW files as Masters and process them ...
- May 8th, 2009, 1:48 am
- Forum: Picture Window Support
- Topic: Raw Dialog
- Replies: 1
- Views: 3422
Re: Raw Dialog
The steps that you see being applied to a RAW file when you press OK/Apply are necessary to 'develop' a RAW into an image that you can see. You may make adjustments to some of those steps (e.g. white point) or add some extras (e.g. noise reduction). When you load a RAW file into the RAW dialog, a mi...
- April 28th, 2009, 1:44 am
- Forum: Picture Window Support
- Topic: Illumination, Colour Temp and Monitor Curves
- Replies: 9
- Views: 11578
Re: Illumination, Colour Temp and Monitor Curves
Could anyone point me out to the actual data of black/white reflectivities of typical photographic papers (or their densities Dmax/Dmin)? Cheers.
- April 27th, 2009, 7:59 am
- Forum: Picture Window Support
- Topic: Naive Theoretical Colour Mgmt. continued.
- Replies: 10
- Views: 16328
Re: Naive Theoretical Colour Mgmt. continued.
Is it the presence of proper LUTs in the source, the target, or in both profiles that enables the use of a rendering intent different from relative colorimetric?
Would it also mean that Preferences/Monitor rendering intent is irrelevant?
Would it also mean that Preferences/Monitor rendering intent is irrelevant?
- April 27th, 2009, 1:13 am
- Forum: Picture Window Support
- Topic: Illumination, Colour Temp and Monitor Curves
- Replies: 9
- Views: 11578
Re: Illumination, Colour Temp and Monitor Curves
Many thanks! As I'm reading the references, I wonder if someone could offer a three-sentences-or-less, layman, physiological/psychological explanation as to why pre-lighting prints (forget colour shifts) to be viewed in environments dimmer than daylight ambient light (but not that overly dim, with n...
- April 26th, 2009, 9:43 am
- Forum: Picture Window Support
- Topic: Illumination, Colour Temp and Monitor Curves
- Replies: 9
- Views: 11578
Re: Illumination, Colour Temp and Monitor Curves
But getting the gamma right, how do I start knowing the numerical value of the target illumination level at the gallery? Is there an approximate model that would relate the decrease in illumination with what the pre-lighting gamma should be to compensate for it? Cheers.
- April 26th, 2009, 6:16 am
- Forum: Picture Window Support
- Topic: Naive Theoretical Colour Mgmt. continued.
- Replies: 10
- Views: 16328
Re: Naive Theoretical Colour Mgmt. continued.
Here is another writeup stating that matrix-based colour spaces (such as sRGB or AdobeRGB) can only be mapped to one another using relative colorimetric intent - choosing perceptual defaults to relative colorimetric anyway. Is that true? That would have explained, I think, why (255,0,0) translates t...
- April 26th, 2009, 5:56 am
- Forum: Picture Window Support
- Topic: Illumination, Colour Temp and Monitor Curves
- Replies: 9
- Views: 11578
Illumination, Colour Temp and Monitor Curves
This may seem like an obtuse problem, but it's a real life issue. Monitor Curves are great if you could compare a test print with a monitor at the location where the print is to be displayed and then 'pre-correct' it. But what if one can't physically go to the display location, but the illumination ...
- April 25th, 2009, 6:48 am
- Forum: Picture Window Support
- Topic: Naive Theoretical Colour Mgmt. continued.
- Replies: 10
- Views: 16328
Re: Naive Theoretical Colour Mgmt. continued.
Here is a blurb supporting what Elie just said:
http://www.earthboundlight.com/phototip ... ptual.html
http://www.earthboundlight.com/phototip ... ptual.html
- April 25th, 2009, 1:13 am
- Forum: Picture Window Support
- Topic: Naive Theoretical Colour Mgmt. continued.
- Replies: 10
- Views: 16328
Naive Theoretical Colour Mgmt. continued.
David and Elie, Many thanks! I think I almost understand it now with perceptual and colorimatric intents. But what happens when a saturated colour (such as pure saturated red (1 0 0)) is mapped from a smaller gamut sRGB to a larger gamut AdobeRGB using 'Preserve Saturation' rendering intent? I thoug...