Vernier Video and Logger Pro Guide - Manual (Page 2)

Video in Logger Pro 2011 2
Video Analysis
You can use the Video Analysis tool to create a graphical representation of the motion you see in
a movie or picture 1 . This is ideal for mathematically analyzing real-world events.
A tutorial covering video analysis is available. Select Open from the File menu, and open
12-Video Analysis in the Tutorials folder. Follow that tutorial to try video analysis yourself. The
discussion below explains some of the functions available to you.
After you insert or capture a movie, you can
open the Video Analysis toolbar. The motion
that you mark directly on the movie will be
displayed on a linked graph. After the desired
range of motion has been graphed, you can
use Logger Pro’s analysis features to study the
plotted data.
Movie Buttons There are five buttons in the
bottom left corner of the movie object shown
here. The button farthest on the left is the Play
button. Click it to play the movie. The next
button to the right is the Stop button. It will
stop the movie during replay. The third button
resets the video to the beginning. The next two
buttons move the video to the previous or next
frame.
Click in the bottom right corner of the movie object to display the Video Analysis Toolbar.
A graph will also be displayed. A new set of X and Y columns will be added.
Video Analysis Toolbar Buttons
Select Point Highlight a trace point in the movie object. This mode is for editing existing
points. Once a point is selected, it will be highlighted. Highlighted points can be deleted or
moved. Move the point using the mouse or by nudging with the cursor keys.
Add Point Enters the mode for marking the location of an object in a frame. Click this
button, and then click on the object location in the movie. The movie will advance one
frame; continue marking the object as desired. The frame time, as well as the X and Y
location of the point is recorded in the data table.
Set Origin Click this button, and then click on the movie to set the location of the origin. If
needed, this coordinate system can be rotated by dragging the yellow dot on the horizontal
axis.
1 Instead of marking one object across frames (time) as you would in a movie, analysis of a picture allows you to
mark many points on one frame. This is useful in getting the points along a curve, for example.