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Title: monitor calibration for mac? Post by: teppy on November 25, 2009, 02:42:48 PM i have the apple cinema 24" display. it really is a beautiful screen. i have read that apple monitors are difficult to calibrate, but it seems alright to me with my eye1 display. I have done several calibrations, and the best one is to me is almost identical to the default factory profile that the monitor came with. this is a darker version calibrated using a windows standard gamma of around 2.1-2.2. i leave the whitepoint to the native, but the gamma is something that i can definitely play around with and they all look good, just some are lighter, brighter, and some are darker and more contrasty. i am looking for any advice on how to decide on which gamma to use for my apple LED display.
Another issue is, i am using a windows laptop only for qimage. i retrieve my processed images ready for printing via my home network in a shared folder. i have always 'converted to profile' (sRGB) right before saving. i noticed in qimage last night after adding my images for printing to the queue that sRGB is what is listed onside of the images down at the bottom. should my printer profile be listed there? it is listed under printer ICC in the job properties. i'm wondering if i need to change my workflow and actually assign a profile in photoshop rather than convert to profile. Title: Re: monitor calibration for mac? Post by: Terry-M on November 25, 2009, 11:11:36 PM Quote i am looking for any advice on how to decide on which gamma to use for my apple LED display. I have always understood that Windows is 2.2 and Mac is 1.8.However, Norman Koren's site says: Quote Your monitor's gamma should be 2.2 or 1.8. 2.2 is recommended for Windows, the Internet sRGB color space, and the popular Adobe RGB (1998) color space. 1.8 is the standard for older Macintosh systems and prepress file interchange (Mac users, see note below). I aim for gamma = 2.2. Drycreek Photo say:Quote Most modern monitors – Mac or PC – have a native gamma near 2.2. A few specialized displays use other values. The traditional Mac gamma of 1.8 is a holdover from the first monochrome Mac displays. Unless that is what your system uses, your graphics editing environment will benefit from changing to a gamma near 2.2. The only drawback is that the Mac GUI elements – menus, buttons, etc. – are designed for a 1.8 gamma display. These elements will appear darker with a system gamma of 2.2, but images displayed in a color managed system will have fewer display artifacts. So it looks like 2.2 these days. Google "gamma for mac monitor" like I did and there are lots of links on the subject.Terry. Title: Re: monitor calibration for mac? Post by: Terry-M on November 25, 2009, 11:35:28 PM Second part of question.
Quote noticed in qimage last night after adding my images for printing to the queue that sRGB is what is listed onside of the images down at the bottom. should my printer profile be listed there? No, it's the image colour space shown in the exif hotbar below the thumbs. If there are asterisks either side, then the profile is embedded in the image - the sure way of telling a program what profile is associated with the image.Quote should my printer profile be listed there? it is listed under printer ICC in the job properties Yes, your printer profile should be selected in job properties (blue dot) or from edit preferences. NB. selected by you, it does not appear automatically.Quote I'm wondering if i need to change my workflow and actually assign a profile in photoshop rather than convert to profile. I'm not exactly sure what "assigning" a profile in PS does. I would think assigning is only ok. when you are sure what the image colour space is and will only be of use within PS. I think if an image is converted in PS, the profile is embedded in the image and that is certain to be recognised in Qimage.Perhaps someone else will confirm or otherwise what I have said about PS profile "assignment". BTW. if an image has no exif tag or embedded profile, Q will default to sRGB but you can override that with a filter. Terry. Title: Re: monitor calibration for mac? Post by: rayw on November 26, 2009, 02:53:55 AM In PS, assigning a profile allows you to work with that profile within that photoshop session only, but it does not embed it. If you 'convert' to a profile, it embeds it in the file when you save the image, as Terry said. Assigning is useful for quickly checking if an image is likely to be out of gamut, say, for a particular profile.
Title: Re: monitor calibration for mac? Post by: Fred A on November 26, 2009, 10:53:22 AM Quote BTW. if an image has no exif tag or embedded profile, Q will default to sRGB but you can override that with a filter. The only other thing to add is the often missed Checkmark in HONOR EXIF color space tags when no embedded profile exisits.If you have a check in there, and an image with a tagged color space, Qimage will open it in that color space. Furthermore, above that area in the dialogue box, there's another area for camera input color space; designed to have Qimage check for tagged color space from your camera shots. If I shoot in JPG mode, I usually set the color to the adobe setting in my camera. By setting that up in that box, Qimage will assign the Adobe color space to any JPG it sees from my camera. If I shut it off in Qimage, the Qimage will default to unknown and assign sRGB. Of course, shooting in RAW mode, there is no assigned color space at the shooting time, and Qimage will either assign sRGB, Adobe RGB, or your camera Raw profile as the color space depending on the settings in Options Raw. Fred |