Macs are more likely to have correct default colour settings
There are also different standards at work here - Apple QuickDraw applies its own built-in gamma correction (of about 1.45 according to some bloke on the interweb). Evaluating on a Mac what will look OK on a PC is a mug's game, because even monitors/screens with comparable gammas will come out wildly different. I don't know whether Quartz does the same trick.
Unless your image manipulation software knows the total gamma of your screen, and it is correctly saving this desired gamma in the image, and the PC displaying it knows the total gamma of its monitor, and correctly applies a correction to get from the gamma recorded in the image to the gamma of the system displaying it, then there's no reason the brightnesses would match.
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timeasmymeasure
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Date: 2004-06-04 10:31 am (UTC)There are also different standards at work here - Apple QuickDraw applies its own built-in gamma correction (of about 1.45 according to some bloke on the interweb). Evaluating on a Mac what will look OK on a PC is a mug's game, because even monitors/screens with comparable gammas will come out wildly different. I don't know whether Quartz does the same trick.
Unless your image manipulation software knows the total gamma of your screen, and it is correctly saving this desired gamma in the image, and the PC displaying it knows the total gamma of its monitor, and correctly applies a correction to get from the gamma recorded in the image to the gamma of the system displaying it, then there's no reason the brightnesses would match.