32
Illustration of Measuring perimeter and Area（Freehand Method）
C1 and A1 are respectively perimeter and area of the first group；
C2 and A2 are respectively perimeter and area of the second group；
C1/C2 is the ratio of two perimeters；
A1/A2 is the ratio of two areas.
Notes: There are limitations of measuring perimeter and area by keyboard. For more
conveniences, you can use the following Mouse Operation.
Mouse Operation
1. Press
to select Freehand method. The cursor appears on the screen, and then use
the mouse to move the cursor to the starting spot of the examined area；
2. Press right button to move the cursor along the fringe of examined area to the end；
3. Press right button again to complete the measuring of perimeter and area.
If measuring should be continued, press
and
or directly press
，and
repeat Step 2-3. You can get 2 groups of data at most. The results are on the right side of the
screen.
After the measuring, press Middle button to clean the screen.
b. Ellipse Method：
Keyboard Operation
Press
to select Ellipse method. At this time an ellipse area appears which is called the
examined area. Use direction keys to move this area.
is applied to shift among three
functions of direction keys to adjust the size and angle.
1. Use direction keys to move the examined area to image display area；
