[APML] Re: Monitor Calibration Thoughts

[Juan Conejero <skycad@ctv.es>]

Hi Warren,

Thank you for your words about our calibration page, which I appreciate 
very much. Happy to know it's useful for you.

Even if one works in a strictly controlled environment, which of course 
means artificial lighting and no open windows, display brightness must be 
controlled and readjusted as soon as lighting conditions may vary during a 
processing session. Relatively small changes in environmental lighting can 
seriously affect what you are perceiving, and hence what you are doing, 
with an image. This is what makes the calibration task a critical one.

A calibration procedure must be as objective and adaptable to specific 
user's conditions as possible. It also must be consistently repeatable. For 
this reason we avoided using images on our calibration page. The brightness 
calibration figure and RGB scales are dynamically generated by JavaScript 
routines on your own computer and display.

I only want to make a comment about what you say in your post.

>                                  -Do the calibration in complete darkness

Are you sure? I don't think display brightness can be correctly calibrated 
this way. Any calibration must be performed under the existing lighting 
conditions in your working place, which are unlikely to be of total 
darkness. Furthermore, as such peculiar darkness conditions affect basic 
monitor performance characteristics, you should consider that most users 
will not be under complete darkness when viewing your images.

Regards,
______________________________________
Juan Conejero, Pleiades Astrophoto
skycad@ctv.es
http://www.pleiades-astrophoto.com/en.html


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