Chapter 2
22
Passthru LUT
It is assumed that the data passed to display memory is 8 bits/pixel.
By default, passthru operations load the Windows system palette
with 128 grayscale RGB values for display and use the default
passthru LUT of 256 monotonically increasing grayscales.
Using software, you can modify the 256-position passthru LUT so
that false coloring is used. For each entry in the passthru LUT, the
index of the closest matching RGB value in the Windows system
palette is used. If an exact match is needed, you can use software to
define 15 extra entries in the Windows system palette.
Overlays
If your system provides Direct Draw Interface (DDI) support, you can
add overlays to bitmap passthru operations. An overlay is an image
that you place on top of the image that was captured using passthru.
You cannot use overlays with direct passthru because they are
equivalent to an obstruction and cause passthru to pause.
Содержание DT3155
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Страница 8: ...Contents viii ...
Страница 16: ...About this Manual xvi ...
Страница 17: ...1 1 Overview Features 2 Supported Software 3 Accessories 4 ...
Страница 41: ...25 3 Supported Device Driver Capabilities DT3155 Device Driver Capabilities 26 Initialized Control Values 44 ...
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Страница 87: ...71 5 Troubleshooting General Checklist 72 Service and Support 76 If Your Board Needs Factory Service 80 ...
Страница 97: ...81 A Specifications ...
Страница 100: ...Appendix A 84 ...
Страница 101: ...85 B Connector Pin Assignments Video Input Connector J1 86 Video Coaxial Connector J2 88 ...
Страница 122: ...Appendix C 106 ...
Страница 132: ...Index 116 ...
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