Jayanne English's Astronomy Image Making Information
Calibrate your monitor.
- Find yourself a CRT. LCD monitors in general cannot be colour balanced
sufficiently for creating images that will look good on a number of monitors.
- Download the following calibration images:
- Turn off the flourescent lights. Some daylight is o.k.
- Let your monitor warm up.
Some monitors let you do an "image
restoration". If so, ensure you do this, after the monitor warms up.
- Settings for your monitor:
These are the values you are aiming for. Brightness and contrast are set using
hardware buttons on the monitor. The others are now usually set in software.
- White point: 6500K
- Brightness 55%
- Contrast 100%
- Gamma 2.2
- Calibrate your monitor:
- Mac Platform:
You can run your monitor from your Mac laptop using a display connector. Open
the System Preferences and then open Displays -> Color -> Calibrate. This will
give you a wizard for calibrating your monitor.
- Linux Platform:
Use the "xgamma -value" command (in the command line) to set your gamma by
hand using an image manipulation package such as GIMP and the calibration
images above. Detailed
instructions are in calibmonitorlinux.txt.
- Check the calibration using the calibration images above, particularly
David Malin's Greyscale.
Make sure the grey's are neutral (e.g. not
bluish-grey), that there are distinctions between each grey level, that the
flesh tones look convincing and that the primary colours are pure.
- Compare images that you create on your monitor with how they appear on
other monitors. For example reset an LCD to a factory default and see that
your images look acceptable on those.