OmniTek OTR 1001, Руководство пользователя

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OmniTek OTR 1001 User Guide, v3.1a E-2
You may also wish to limit the part of the image that is analysed, by defining the Region of
Interest (see below).
E.2 Focus of Analysis
While many of the results displayed by the OTR 1001 come from analysing entire frames of
video, the system can be set such that displays such as the Waveform View and the Vectorscope
just show the results from a particular line or band of lines of each frame, or from a particular
‘Region of Interest’ or to show just the data that applies at or around a particular point within the
frame (indicated by a ‘crosshair’ cursor on the Picture display).
Figure E-1: Waveform View showing YCbCr components around point in frame
marked by crosshair cursor on the Picture display.
The Region of Interest and the position of the
crosshair can both be seen on the Picture
display and can be adjusted via that display.
However, the choice of the area to work with
and the position of the crosshair cursor
typically need to be coordinated across more
than one display, so the details are seen as
properties of the video stream under test
rather than of the Views through which the
results are displayed. The relevant settings
are therefore displayed – and can be adjusted
– in the
Inputs section of the View window’s
Properties control.
Line Mode
The Line Mode control works with Line
Mode controls for the Waveform,
Vectorscope and CIE Chart displays. When
set to
Single , it switches all the above
displays to analysing the line under the
crosshair cursor (see below): the individual
displays can subsequently be set to display
‘MultiLine’ results. The other options here
define how much of the frame is analysed
when this MultiLine option is taken, either
All the lines of the frame, just the Active
lines or a Custom band of lines (defined by
Y start and Y range ).
Figure E-2: Inputs section of
the View window Properties control.
Note: ‘Cage’ is described in Section F.2.