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Old 12-18-2019, 05:41 PM
dtvmcdonald's Avatar
dtvmcdonald dtvmcdonald is offline
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Join Date: Nov 2012
Posts: 1,196
Color Test Patterns

These are images I use is setting up color sets, with a special emphasis on sets using I-Q demodulation such as the CT-100.
You put these on a DVD-ROM or a USB stick and play them on your modern DVD or Blu-Ray player that does jpegs.
My player's native file size is 720x484 so that's what they mostly are.

The first set are especially useful with a scope looking at I, Q, R, G, and B
lines as they are full screen vertically.

The ones with gray background are constant Y so on the screen visually they should be pure gray with "Color" at zero or/and the fine tuning well detuned.

The next one can be used visually or on a scope. The levels are 0 for the background, from top to bottom and left to right:
255 170 85 43 128 213
The average of each line is constant luminance.
Attached Images
File Type: jpg ColorBarsFull.jpg (17.2 KB, 23 views)
File Type: jpg Idoublebars.jpg (32.5 KB, 18 views)
File Type: jpg Qdoublebars.jpg (32.5 KB, 16 views)
File Type: jpg OldColorBarsB.jpg (41.3 KB, 18 views)
File Type: jpg OldColorBars.jpg (56.5 KB, 19 views)
File Type: jpg grayrect.jpg (20.3 KB, 15 views)

Last edited by dtvmcdonald; 12-18-2019 at 06:02 PM.
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