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Digital Projection INSIGHT 4K Dual LED & Quad Series
APPENDIX E: GLOSSARY OF TERMS
Brightness (optical)
Notes
Describes how 'bright' an image that is projected onto a screen appears to an observer.
Color difference
In
Component Video
signals, the difference between specified colors and the luminance component. Color difference is zero for
monochrome images.
Color gamut
The spectrum of color available to be displayed.
Color temperature
The position along the black body curve on the chromaticity diagram, normally quoted in Kelvin. It takes into account the preset values for
color balance in the service set-up to take up the variations in the prism. The projector allows you to adjust this temperature (i.e. adjust the
picture color temperature).
Contrast (electronic control)
The adjustment of the white point of the image without affecting the black point. This increases the intensity range of the displayed image.
Contrast (optical)
The intensity difference between the darkest and lightest areas of the screen.
Crop
Remove part of the projected image.
Alternatively, fit an image into a frame with a different
aspect ratio
by removing part of the image. The image is resized so that either its
length or its width equals the length or width of the frame, while the other dimension has moved outside the frame; the excess area is then cut
out.
Dark time
The time inserted between
frames
when using
3D active
glasses, to avoid
ghosting
caused by switching time between left and right eye.
Reference Guide
Rev B June 2016
page 66
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