On 06/07/2009, Joseph McAllister <[email protected]> wrote: > I have had my iMac monitor calibrated by my Spyder 2 as I received it from > Apple. And have always had to fight the "Dark Print" phenom with all three > of my printers. > > Reading a Shutterbug article yesterday about this, I realized my LCD was > still set to full brightness. It was recommended that I d/l and try out a > software program called "Color Eyes Display Pro" to calibrate the monitor to > the standards I input. Recommended was Color Temp of 6500, 2.2 Gamma, and 90 > as a luminance setting, allowing the monitor to fit better with the > printable gamut.
Generally luminance is best set at between 80-100 cd/m2, I set my monitors at 90 cd/m2 using my Spyder 2 and Spyder2Pro software, most monitors are set too bright, it helps in the specification contrast ratio race not much else. > I am going to upload an image right now that I will set up with the monitor > as it is now. Shot in the shade it's white shows a 221 L, it's black as 22 > L, compared to a previously processed photo shot in the sunshine before this > calibration with a 233 white, 8 black. I did move the contrast up .04, and > the exposure up .33 so it looked ok to my eye. > > Take a look at the month of 07.2009, last picture, plus anything shot > anytime prior to that (I know the two little dogs chasing each other in the > late day shade are dim and under-contrasted)(and not sharp) and let me know > please. > > So it seems to me that these values are in the image, and the > monitor/graphics card slides these values around to make the image fit the > display gamut. Am I right? That's how it works, 255,255,255 in an 8 bit per cc image is white but what it translates to on screen is dependent on the screen calibration. Generally monitors are assumed to adhere roughly to the sRGB colour space which used to work quite well. However recently default luminance on TFT displays has gone skywards and it's no longer reasonable to assume that most monitors will render as per the sRGB spec. Having a color management and color space aware Browser isn't a great help either if your luminance levels aren't either pre-set to sRGB levels or measured (and known to the calibration profile of the display device under control of the colour management system). See sRGB reference viewing environment in the link below: http://www.w3.org/Graphics/Color/sRGB.html Cheers, -- Rob Studdert HURSTVILLE AUSTRALIA Tel +61-2-9554-4110 UTC +10 -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
