NAC Image Technology SP-642 User Manual page 370

2) Measure Angles with 4 Points
As shown in the following figure, first click on the 1
4 points. Then make a second line with the 3
connecting the first and second lines as a reference, and the angle counterclockwise or
clockwise from there is determined.
(with two vectors, the angle of vector 12 and vector 34.)
Caution It is important to sequentially click on 4 points.
rd
3
Measure Angles with 4 Points (Angle in the Figure is Counterclockwise)
13 - 14
If the clicking sequence is wrong, measurement of the expected angle will
not be possible.
point
st
1 point
st nd
and 2 points to measure angles with
rd th
and 4 points. Measuring uses the line
th
4 point
nd
2 point
(00292)H