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Confused about color management
Hi everybody,
Can someone explain to me the basics of a color-managed workflow? I searched the web and the forums, but still confused... Let's say here are the prerequisites: - I shoot RAW - AdobeRGB is the working profile - I have my Monitor profile - I have my lab printer profile - I use Photoshop Questions: - When does the monitor profile come into play and what happens if I don't use it? - Aside from converting to the printer profile (I should convert as a last step, right?) what should be done that what I see on my monitor is (at least roughly, I know I'm no pro and not looking to) what I get on a print? - What happens in case of B&W? Thank you all |
#2
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Confused about color management
"Artem Lipatov" wrote in message ups.com... Hi everybody, Can someone explain to me the basics of a color-managed workflow? I searched the web and the forums, but still confused... Let's say here are the prerequisites: - I shoot RAW - AdobeRGB is the working profile - I have my Monitor profile - I have my lab printer profile - I use Photoshop Questions: - When does the monitor profile come into play and what happens if I don't use it? - Aside from converting to the printer profile (I should convert as a last step, right?) what should be done that what I see on my monitor is (at least roughly, I know I'm no pro and not looking to) what I get on a print? http://www.drycreekphoto.com/Learn/color_spaces.htm http://www.earthboundlight.com/photo...tml?source=rss and others. You could spend a bit of time on this |
#3
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Confused about color management
FWIW There is a specific Adobe forum (which is also mirrored on their
own news server: adobeforums.com ) on Color Management ... it has always provided me with a lot of info http://adobeforums.com/ |
#4
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Confused about color management
"Artem Lipatov" wrote in message ups.com... Hi everybody, Can someone explain to me the basics of a color-managed workflow? I searched the web and the forums, but still confused... Let's say here are the prerequisites: - I shoot RAW - AdobeRGB is the working profile - I have my Monitor profile - I have my lab printer profile - I use Photoshop Questions: - When does the monitor profile come into play and what happens if I don't use it? The graphics driver uses the profile to adjust the colors. If you don't use, then what you see will not be what you get. - Aside from converting to the printer profile (I should convert as a last step, right?) what should be done that what I see on my monitor is (at least roughly, I know I'm no pro and not looking to) what I get on a print? Create a profile and then tell windows to use it. Jim - What happens in case of B&W? Thank you all |
#5
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Confused about color management
Artem writes ...
Can someone explain to me the basics of a color-managed workflow? Yes, this site is a good start ... http://www.creativepro.com/story/feature/13605.html When does the monitor profile come into play When you are viewing files in a program that supports the ICC color management workflow. The RGB values in the file get translated on the fly by the profile so you see the colors on screen as accurately as possible, depending on whether colors are out of gamut for your monitor or not (and assuming the profile is accurate). Most graphics programs, even the cheaper ones, now recognize monitor profiles, but most web browsers and some viewer programs (as opposed to editors) do not. ... and what happens if I don't use it? The colors look different ... you can simulate this in Photoshop with View - Proof setup - Monitor RGB, which turns off your monitor profile. This is useful when you're having troubles matching colors you see in Photoshop to what you want viewers to see in a non-color managed workflow like the web. Typically the saturated colors are affected most (at least on my monitor) and usually dull down a bit. Aside from converting to the printer profile (I should convert as a last step, right?) No, most people do NOT convert to the printer profile anymore (unless sending the file out). A better workflow is to soft-proof to your printer profile (View - Proof Setup and pick the printer/paper profile from the menu) and then print with that enabled. The exact mechanics depend on which printer you are using since the driver software menus are different, but it's pretty simple to set it up for the Epson Photo printers, for example. what should be done that what I see on my monitor is (at least roughly) what I get on a print? What you are SUPPOSED to do is make the print, let it dry down (up to 24 hours for some printers) and then view it with a controlled D50 light source near the computer, checking carefully that the screen view matches the print under these light conditions (the ambient light striking the computer screen should be the same as when you generated the monitor profile). What most of us do is just view the print under typical viewing conditions instead, which isn't as rigorous. At any rate, the main criteria is that the print matches the screen. If it doesn't then the monitor profile could be bad or the printer profile could be bad (or both ... or the viewing conditions are different). What happens in case of B&W? Same deal, print it and compare ... a lot depends on your printer here, are you using a color printer with all the inks (hard to get a neutral print except on a few Epsons) or using a Quadtone type inkset or ?? A good test is to create a gradient from black to white and print this and see if you pick up a color cast, meaning the printer is not neutral for b/w. With most printers you'll see a color cast, unfortunately, typically green or magenta in part of the gradient. Bill |
#6
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Confused about color management
On Sat, 26 Nov 2005 15:52:39 -0500, "Charles Schuler"
wrote: "Artem Lipatov" wrote in message http://www.drycreekphoto.com/Learn/color_spaces.htm http://www.earthboundlight.com/photo...tml?source=rss and others. You could spend a bit of time on this Also a lot of money. A highly recommended book is "Real World Color Management." I got my copy from Amazon. It's not exactly light reading, but neither is this topic. Father Kodak |
#7
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Confused about color management
"Artem Lipatov" wrote in message ups.com... Hi everybody, Can someone explain to me the basics of a color-managed workflow? I searched the web and the forums, but still confused... Let's say here are the prerequisites: - I shoot RAW - AdobeRGB is the working profile - I have my Monitor profile - I have my lab printer profile - I use Photoshop Questions: - When does the monitor profile come into play and what happens if I don't use it? Calibrated monitor analogous to calibrated light-box needed for viewing slide for genuine color rendition by the film. A calibrated monitor profile is needed by color management system to map the displaying colors to the CIE*L*a*b standard colors or simply the correct colors. When you shoot in Raw or any image that needs to do tone adjustment, don't you think the genuine color got to be displayed first before an appropriate adjustment is made. Remember, calibrated monitor is for correct colors viewing only and has nothing to do with good print; but printing profile needs the monitor profile and several others interacting in the color management engine (CMM) conforming to CIE*L*a*b standard. - Aside from converting to the printer profile (I should convert as a last step, right?) what should be done that what I see on my monitor is (at least roughly, I know I'm no pro and not looking to) what I get on a print? There are several ways to print that matches closely to a calibrated monitor. The first one is to use your printer color management software but you need to use its ink and paper for good result. In photoshop, use the print with preview..., color management, source space:document and print space: printer color management then proceed to print properties and select the paper types and printing method with its color management on from the printer software. You could convert to paper profile but print space:same as source and printer color management off. Another way is the same as first method but off printer color management and select a paper profile instead of printer color management. - What happens in case of B&W? The same but in printer properties select print in B/W. Some time you may need to increase the contrast a little. Thank you all |
#8
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Confused about color management
Artem Lipatov wrote:
Hi everybody, Can someone explain to me the basics of a color-managed workflow? Sorry, I doubt anyone is interested in writing a book here to explain this. It's not complex but would take more that anyone is going to write in a newsgroup post to explain it all. Go to amazon.com and buy "color confidence" by Tim Grey. Should be able to find a copy used for less than $10 and it does a great job of explaining the basics. If $10 is too much to spend, I'm sure there is soem decent free web advice on the subject. I prefer reading from a book when there is this much to study rather than trying to read a monitor. To answer you simple questions: - When does the monitor profile come into play and what happens if I don't use it? It makes the colors in the file appear correctly on your monitor. Unless you have generated a profile for YOUR monitor using some calibration hardware, the caned profiles included with a monitor are pretty useless. - Aside from converting to the printer profile (I should convert as a last step, right?) what should be done that what I see on my monitor is (at least roughly, I know I'm no pro and not looking to) what I get on a print? Most labs are NOT looking for a file converted to their profile, they are looking for either an sRGB or an aRGB file. You use their profile to "soft proof" your image in PS and look for out of gamut colors that WILL be a problem. You convert to a printer profile when YOU are doing the printing at home and it's easier to use some software like Qimage to deal with the printing anyway. Unless you understand what's going on, you can REALY get lost. People make mistakes like double profiling (sending a file to a lab "profiled" and then the lab profiles it again) or assigning a profile when it should be converted etc. - What happens in case of B&W? ??? It still has to be "profiled". If a lab is making your prints, get something like an "eyeone" monitor calibrator and follow the instructions. Then find out what color space the lab wants the image in and make sure it's CONVERTED to that color space. It easier if you shoot sRGB if the lab prints sRGB and no convertions are ever needed. You can use their printer profile to "soft proof" in PS and check for out of ganut colors and correct them. Then send the file to the lab with a note "no corrections" and see what you get back. It should end up close to what your monitor shows. Again I'd get the above book so you actually understand what is happening and how the human eye "resolves" color etc. It explains all about white balance and scanner profiling etc. It will be the best $10 you've spent. -- Stacey |
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