Shel B wrote:
I am not very computer literate. I struggle with post camera processing. I normally shoot Raw images and process them using Aurora HDR and Picassa. Here's my problem. When I process an image so that it looks good on my pc screen it shows much more contrast when viewed on my large screen tv. It also look different when it is printed. I print larger prints, up to 30x40 inches. Is there any way to resolve this problem so that what I see on my pc screen is what I see on my large tv and the final print?
I am not very computer literate. I struggle with ... (
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You're dealing with ICC color management failures.
Assuming you have a monitor suitable for photo editing (NOT a gaming monitor or a cheap office monitor), the next thing you need is a monitor calibration and profiling kit. These are made by X-Rite and Datacolor.
First, calibrate AND PROFILE the monitor. This REQUIRES a calibration kit. You cannot do it by eye if you care at all about getting consistent results from other devices. Most monitors are set for maximum brightness and contrast when you buy them. Those settings are COMPLETELY inappropriate for use in photo editing. You don't need brightness. You need color accuracy. The cal kit will help you get the right look quicker than any other method.
Try these aim points, which you can usually set in the calibration software, which will then direct you to adjust the monitor, based on feedback from a probe placed on the screen. (These will make sense once you buy and use a kit.)
Black Point = 0.5 candelas per square meter (cd/m^2)
White Point = 80 to 120 cd/m^2 (I like 105, which matches the PPA viewing standard for competition prints)
Color Temperature 5000K to 6500K (5000K at around 80 candelas per square meter; 5800K at 105 cd/m^2, 6500K at 120 cd/m^2.)
Gamma 2.2 (NOT 1.8, even on a Mac)
If you have multiple monitors to calibrate, use exactly the same aim points on each monitor.
Once you have the monitor accurate, you can adjust your images, and expect that they will print well and look good on other devices.
Color management is a system. When you export or save files to print or to view on another system, they must be written into a "standard color space." The most common one is sRGB. Start there. Unless your monitor is GUARANTEED to display over 96% of Adobe RGB, do not use that color space. Unless your lab or printer asks for another color space, stick with sRGB. It is the standard used by most commercial photo labs and the entire Internet, and nearly all office printers.
If your TV does not display sRGB images correctly, try saving them in Rec 709 or HD 709 or SMPTE-C or some sound-alike variation of these color spaces. If you plug a USB stick into your smart tv and view sRGB images, there will be a profile mismatch. If you adjust the TV to compensate, TV images will not look right...
'709 or SMPTE images may not look right if printed, but they may look better on your TV.
If you use a video editor to create a slide show, it will probably do the sRGB to Rec 709 color conversion for you during rendering. iMovie and Final Cut Pro X on the Mac certainly do.
If you are printing at home, you should be sure to use the printer manufacturer's inks and papers. Otherwise, you will need profiles for your printer that are made for use with the specific third party ink set and/or paper combination you are using! Most printer manufacturers build their own color management into the printer driver, so if you use their materials, you'll get accurate results. If you buy from Moab, Red River, Magic, Hahnemuhle, Harmon Galerie, or any of the other fine paper manufacturers, you will need to download and install their profiles for your printer, or buy an advanced cal kit to make your own profiles.
If you send files to a lab, you can get the very best results by adjusting color in reference to the lab's printer profile. Get the profile from the lab, install it, and use it as a "proofing" profile during final image adjustment. It should give you a better approximation of "what I see is what they print."
The "how to" mechanics of all this are described on the X-Rite and Datacolor web sites in far more detail. Scour their sites for white papers, videos, training materials, and instructions.
I hope that helps.