Re: [mythtv-users] Colour Saturation Problem

Brad Fuller Mon, 30 May 2005 18:11:08 -0700

Ian Trider wrote:

On 5/30/05, Brad Fuller <[EMAIL PROTECTED]> wrote:

related question: anyone know of free open test patterns/color bars/etc
available? I have a DVD for calibration (that I use on the sets), but
unfortunately I don't have a DVD player on the mythtv pcs.


No, but you can create them very easily:  Create a simple image in
something like GIMP that has boxes that are 0% white, 50% white, and
100% white, the colour red (255,0,0), the colour green (0,255,0), and
the colour blue (0,0,255).

Not quite the same as a full test pattern, but it'll give something
reasonably decent to calibrate off of.

I have some jpgs of smpte color bars, color scale test, gray scale, etc. I use these to calibrate my computer displays.

Note, however, that the output equipment has to be properly calibrated
itself to calibrate the viewing device;  if your video card is putting
out severely miscalibrated video (you would need an oscilliscope to
actually determine what it is outputting, because how you perceive the
displayed image depends on your TV's calibration), calibrating your TV

Good point. Any instructions on how to calibrate the video card?

to it will of course put your other sources out.

Probably best to use a DVD to fix the TV first,

always! I use the Video Essentials DVD on a Sony consumer DVD player.

 so you end up with
(assuming the DVD player doesn't suck) something close to properly
calibrated,

This is a good point. I just assume the DVD player is reasonable.

and then fix the MythBox by generating calibration images
(and adjusting the computer's settings) as described above.

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Re: [mythtv-users] Colour Saturation Problem

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