20
1. First
I. Displays the first frame in the video.
2.
Previous
I. Displays the previous frame in the video.
3.
Play (visible while paused)
I. Cycles through every frame in the video.
II. If ‘Analyse’ button is checked, the contact angle will be measured for each frame.
4.
Pause (visible while playing)
I. If pressed after ‘Play’, the video will stop at the current frame.
5.
Next
I. Displays the next frame in the video.
6.
Last
I. Displays the last frame in the video.
(II) Frame
•
Displays the index number of the frame being displayed.
•
The first frame in the video has an index of 0.
8.3.10 Data Saving
Results files are saved in a tabular format as .csv files, which can be opened with most spreadsheet
programs. The file contains seven columns of measurement results, which are described in the
Table 8.1.
The save directory and file name can be selected using the controls shown in
Figure 8.14.
Table 8.1.
Column names and descriptions for contact angle data saved in the results .csv file.
Column Name
Description
Frame Number
The frame number in the video file
Time (s)
The time at the frame number
Left Angle (°)
Left fitted contact angle
Right Angle (°)
Right fitted contact angle
Average Angle (°)
Mean average of the right and left angles
Left Contact Point
The x coordinate (in pixels) at the point where the left edge of the
droplet intercepts the baseline
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