V I D EO EXE RC I S ES
If you have read the prev ious section - PAINT EXERCISES -
then you're ready for VIDEO EX ERCISES. We w i l l work through
some examples, and see how PAINT and VIDEO overlap. The
a b i l i t y to select PRESETS and MENUS is assu med.
A
camera or other sou rce of video i mage must be connec ted to
the CVI for the video effects. It is a l so desirable to have a
c h roma-key blue backgrou nd, to enha nce m a n y l i ve effects. In
fact, a l l references to live im age in this sec tion assume the use of
c h roma-key. The CVI can be used to esta b l ish ch roma-key l evels
by u s i n g PR ESET
99.
See Sectio n 3 - SETUP Menu. If you intend
using chroma key, the following may be he l pful.
C h r o m a - K e y S e t u p S u g g e s t i o n s
Have the a rtist's model i n front of a medium blue fla t, non
reflective background (usua l l y a wall or screen).
Ensure adequate lighting, such that no shadows fa l l o n the
background. This would require a t least two flood l i ghts ei ther
side of the subject. However, too much flood l ighting ca n result in
'hot spots' on the chroma key background. These a reas can not be
keyed out, so the floodlights would have to be re-arranged.
The s u bject should not wear any blue clothing as it will
'disappear' on screen. This can be used, however, to create
effects.
Use PRESET
99
and the HUE, S A TURA TION and VALUE
sliders o n the control console to 'key out' the blue background.
See Section 3 - SETUP Menu.
Several video effects require the video image to be movi ng, in
order to see the effect.
General Overview
The CVI can accept u p to two video i n puts, the cascaded
output and stencil output of another CVI, audio input for music
control of effects, and remote control trigger. Therefore, many
permutations of live CVI effects exist which a re not covered in
this section. However, enough effects will be discussed here to
enable you to d iscover new things to do w i th the CVI which even
we haven't thought of yet.
GETTING STARTED
-
7
Summary of Contents for CVI
Page 1: ...r e User Manual Computer Video Instrument...
Page 4: ...Startea 2 Video Melius...
Page 102: ...33 Quad mirror Slow scan across L J _J...
Page 103: ......
Page 104: ...56 Under over stencil 57 Under over catch up 58 Push to freeze...
Page 105: ...60 L J _JI L...
Page 106: ...80 Under over texture wipe L J _J...
Page 107: ...L J _Jd r...
Page 197: ...RS232C Port ControI 1 Rev 7 Software Update 1...
Page 268: ...Glossary 1 Index 5...
Page 282: ......
