10. Settings
Black level
∆
R
ADC
0
255
i1 : superfleous information
i2 : video information
Image 10-22
One can conclude here that a good color tracking can only be met by using three previously (input) balanced
color signals
The objective of input balancing
The objective in input balancing is to “set” the same black level and the same white level for the three colors of a particular input
source.
Black level setting : brightness
White level setting : contrast
The same absolute black and white level for the three colors allows the same reference for Brightness and contrast control of the
picture !
These two references also set the range in which the ADC will work for that particular source ( this explains also why each input
balance setting is linked to a particular source and thus saved in the image file).
How can it be done ?
To balance the three color signals of a particular source there are conditions; in fact we must know the black and the white level of
the source i.e. :
1.
the source in question must be able to generate a white signal, ideally a 100% white (background) full screen pattern
2.
the source in question must be able to generate a black signal, ideally a 100 % black (background) full screen pattern
A
B
Image 10-23
White balance : In the projector, we will set the contrast for each color until we get a 100% light output picture when projecting a
100% white image (image A)
Black balance : In the projector, we will set the brightness for each color until we get a 0% light output picture when projecting a
100% black image (image B).
The changeover (transition) from min to max is indicated by the apparition of bright spots also called “digital
noise”
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Содержание MGP 15
Страница 1: ...MGP 15 Medical Grade Projector Owners Manual R9003110 R5976741 00 28 04 2004...
Страница 4: ......
Страница 8: ...Table of contents 4 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 10: ...1 About this manual 6 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 30: ...4 Connections Image 4 13 26 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 44: ...5 Getting started 40 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 48: ...6 Introduction to Medical Visualization systems 44 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 50: ...7 Main Menu 46 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 66: ...8 Adjustments 62 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 88: ...10 Settings 84 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 100: ...11 Tools 96 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 107: ...12 Video formats Image 12 16 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004 103...
Страница 108: ...12 Video formats 104 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...
Страница 114: ...13 Information 110 R5976741 MGP 15 MEDICAL GRADE PROJECTOR 28 04 2004...