GE XL VU Operating Manual page 103

Measurement
Matching Cursors
PLACE ITEM. SELECTS NEXT ITEM.
SQ INCH
A32
BLU
<5>
Your cursors Matching cursors
INDEX = 1.7 <5>
BACK ZOOM
For each cursor the user places on the left image, the system places a
matching cursor on the right image.
The left cursors must be placed on an image point that has enough
detail to distinguish it from surrounding points. If the neighboring points
look the same as the point chosen the system cannot accurately place a
matching cursor.
For every matching cursor, the system calculates a match strength value
between <0> (lowest confidence) and <5> (highest confidence). If too
little detail is present, the system simply does not generate a matching
cursor. Whenever possible, achieve a match strength of at least <3>. If
this is not possible, capture another image.
Verify that the matching cursor appears to be in the same position as
selected cursor. A matching cursor that is off even slightly can have a
significant impact on the measurement accuracy.
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XL Vu™ VideoProbe 103