CX1 ball path detection method
Even though the CX1 features only 1 camera - usually only used to detect launch angle and ball speed -
ball azimuth ie. Ball path/direction can also be detected by measuring the width of the trace and comparing it to the trace width of a straight shot.
i.e. the trace width will be greater if the ball is traveling towards the camera and smaller if traveling away from the camera.
The following are some screen shot examples:
The above is of a shot with a reasonably straight ball path using the CX1. In the bottom right hand side of the screen you can see that the measured ball path was 1.68 degrees right.
To verify this ball path measurement, we used an overhead ball path camera. Here the shot is showing a 1.76 degree right ball path. In this example, the CX1 was only 0.08 degrees off.
Here the trace width is smaller so we know the ball was traveling away from the camera compared to the straight shot. Calculated ball path is 14.32 left.
Overhead ball path camera is showing 14.90 left
Here the trace width is greater so we know the ball was traveling towards the camera compared to the straight shot. Calculated ball path is 7.52 degrees right.
Overhead ball path camera is showing 7.69 Right
As you can see from these test shots, the method is seems quite accurate
We can't guarantee that this accuracy can always be attained and it won't be as accurate as using a dedicated overhead ball path camera but nevertheless, it's still very usable..
CX1 ball path detection setup instructions
For the method to function, we first need a reference trace width of a straight shot.
To do this, hit a slower but as straight as possible shot.
The trace width of the shot will be displayed at the bottom right hand corner of the screen in yellow text. Here it is 28.15 pixels.
Select the "Straight" radio button just above this and adjust the value to as near as possible to the "Current Width" value. In this case it's 28.00.
Now hit a shot right.
If you want, you can put down a marker at the bottom of the screen that is a known number of degrees right from the ball hitting position and aim at that.
You should see that the ball path displayed is also right by a number of degrees. Use the "Right" adjustment factor to adjust the measured ball path to the correct path angle.
Now hit a shot left and use the same procedure for the right path adjustment for the left adjustment.
i.e. select the "Left" path adjustment radio button to adjust the measured ball path to the correct path angle.