In other words, rather than those colours being interpreted to be placed somewhere within the available color space (as you suggest), it seems that HDR Studio is not doing any colour space conversion. The most obvious change is that the image actually becomes lighter (again perhaps not the best descriptive term) as well as colour being altered.įurther to the above I have also discovered that when an image saved using ProPhoto RGB is "assigned" the Adobe RGB profile (in say photoshop, but any colour managed application will do) that this image has exactly the same RGB values as an image saved directly from HDR Studio using the Adobe RGB colour space.
The most obvious problems are these as I am viewing images displayed in HDR Studio on a monitor that has a colour gamut more limited than the Adobe RGB colour space (probably only 85% of Adobe RGB) it seems reasonable to assume that little or no obvious difference would be perceived when the colour space is changed from Adobe RGB to ProPhoto RGB (only colours at the extremes of the gamut). (3) The colour values in the saved image are limited by the chosen colour space (chosen in "Profile to embed"). The displayed colours in the image are limited by the chosen colour space. (2) Negafix profiles are used to map the scanned RGB values to positive RGB colour values internally (within SilverFast) and an image is then displayed (in HDR Studio). (1) A negative is scanned and the scanners RGB data is recorded unaltered (for an HDRi). Please ignore Positive scans and concentrate on the negative scanning.įrom what I understand of the functioning of SilverFast and from what has been said in replies here the following situation appears to be what is supposed to be happening Thanks for the reply but I'm still not convinced something isn't wrong, I'll try to explain and would request you carefully read my response as it is somewhat long winded. If I select Adobe RGB or ProPhoto RGB and click 'Apply' I don't expect to see any difference on my computer monitor, as it doesn't even cover the Adobe RGB completely but I do!? In fact when ProPhoto is selected the image shown in the main image window becomes slightly 'brighter/lighter' (not a very accurate or technically correct term). This is the point at which my confusion has occurred. Similarly if I intend to print an image to paper I would like to choose a larger colour space like Adobe RGB (1998) or ProPhoto RGB. So if the image is intended only for display on a computer monitor I would choose in the Options CMS tab, Profiles for ICM Internal to be "sRGB IEC61966-2.1" and the embedded ICC profiles section shows this as the profile to embed. I should perhaps point out that I also calibrate my monitor using an X-rite Eye One Display 2.Īt this point I expect to perform any dust removal, change output resolution and so on in HDR Studio and then choose an appropriate colour space for the intended output. So an image subsequently opened in HDR Studio reports an Embedded profile of SFprofT (PerfectionV700).icc. I have profiled my scanner using a SilverFast target and hopefully I'm right in thinking that this will result in saved raw image data that has a colour space that matches the colour space of the profiled scanner. I've been scanning negatives and positive colour slides as either 48Bit HDR or 64bit HDRi so that I can process them at a later date for both web publication and printing. I'm getting a little confused again with Colour Management in HDR Studio, I'll try my best to explain my confusion and hopefully someone can help me ask the right question and perhaps find an answer!
0 kommentar(er)
