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I'm preparing a short, 10 min presentation to the local Audubon chapter and observed that there is a strong color shift towards the Red and Orange. I saved the images as jpeg files at 300 dpi. Changing it to 96 dpi does not seem to make a difference. The embedded profile is Adobe 1998 same as in CS6. Would like to ask if you have seen this phenomenon and how to deal with it. Thank you in advance! Loi
First of all, the ppi setting is irrelevant for anything but printing so that is not an issue for you. If PowerPoint is properly color managed, the AdobeRGB color space should also not present a problem. However, it might be safer to convert the images to sRGB which is closer to the native color space of the projector so things will at least be close to correct if and when you ever use a slide show application that is not color managed. The last variable could be the projector itself which may require that you generate a custom profile to get more accurate color.
Hi Mike, I tested sRGB and Adobe RGB and look at them on my Eizo Color Edge and there is no significant different when looking at side by side on the same power point slide. The color shift relative to CS6 is very visible. thanks. loi
Hi Loi, do you see the color difference between PPT and CX6 on your monitor, or is there a difference between the image on the screen and the projected image? I find the latter to generally be the case, unless you have a top of the line and relatively new projector. I use a lot of my photos in teaching, and I'm quite sure I've never seen it projected correctly apart except once on a brand new high end projector.
If it's the first, than your observation seems to suggest that PPT is not or not properly color managed. A better test for that is to compare both images in PPT side by side with their counterpart in CS6 and see if the color shift between the two programs occurs with both color spaces, or just in one (which then would be the Adobe RGB image).
""Quote:
Originally Posted by Jerry van Dijk
Hi Jerry, I looked at the power point in slide show on my calibrated Eizo 27" Color Edge monitor and compared to the same image in CS6 on the same monitor. So, no question there is a color shift in Power pOint. However, when I looked at the Power Point on my PC lap top whose display is very poor, i do not see the color shift, but of course I would miss seeing a bunch of other details. Interesting eh? So you are right, when the image is to be projected on a projector, It is not of high quality as I would see on my calibrated monitor, but at least the strong Red shift is not present.
Mike, thank you for your offer to help. I think i understand the issue and will not bother you.
Loi
Sounds like PP is sending a low gamut sRGB image to the monitor in its native AdobeRGB gamut. (Assuming you have a wide gamut monitor.). Try setting the monitor to sRGB and the difference will go away. That's why you don't see it on the sRGB monitor.
I'm my iPhone at the moment but I've covered some material on the gamut issue in one of the tutorials I put in Educational Resources.
