VisTrak Installation VisTrak Eagle VisTrak SCX VisTrak EV VisTrak KX VisTrak LX Video Swing Capture Videos

 

New AI Ball Spin

As of CP version 10.4.9.8

new AI methods of detecting back and side spin are being used.

As such, no specific adjustments have to be made

Even with ridiculously out of focus and big motion blur images of the ball in flight,

the method can still detect the markings on the balls and detect spin.

Selecting the Ball Spin Detection method

Please note:

Ball spin detection is now only performed with the system using TMPix balls.

All other methods have now been removed.

Main reasons are that

1. In contrast to using the ball logo, no matter what ball in flight frames are used to calculate the spin, there are always 2 frames showing the Pix images

2. In contrast to launch monitor proprietary balls with spin dots on them, TaylorMade Pix balls are readily available in any golf store for a regular ball price

Taylor Made PIX balls

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Note that the VisTrak systems require that the camera shutter speed has to be at or below 3s00 micro seconds

if ball spin is to be measured and not calculated.

Side Spin

Note: When the system is unable to determine side spin from marked balls,

then side spin is calculated from the relative club face angle to path and not just from the face angle itself.

Examples:

1.Draw

If club path is 10 degrees in-to-out and face angle is 5 degrees open, then relative club face angle is -5 degrees closed

which results in a negative side spin and the ball will curve back left after starting off right (i.e. a draw)

2. Pull draw

If club path is 10 degrees in-to-out and face angle is -5 degrees closed, then relative club face angle is -15 degrees closed

which results in a negative side spin and the ball will curve left after starting off left (i.e. a pull-draw)

3. Push

If club path is 5 degrees in-to-out and face angle is 5 degrees open, then relative club face angle is zero degrees

which results in a zero side spin and the ball shot is a straight push right

3. Fade

If club path is 0 degrees and face angle is 5 degrees open, then relative club face angle is +5 degrees

which results in a positive side spin and the ball shot is a curve to the right after starting out straight

3. Push Fade

If club path is 10 degrees in-to-out and face angle is 15 degrees open, then relative club face angle is +5 degrees

which results in a positive side spin and the ball shot is a curve to the right after starting out right

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VisTrak EVi / LX2

Ball Spin Detection from the Side camera

Note that no additional lighting is required with the LX2 and EVi (near) systems as the light source is very close to the ball

The default camera exposure time for the LX2 Vcam is just 50 micro seconds

New spin detection method for side mounted camera systems (i.e. EV and LX)

The method consists of rotating ball spin frame 1 in single degree steps and comparing it to the ball spin image 2.

A best match test is performed which returns the amount of rotation between the two frames.

Knowing the amount of rotation and the time taken, accurate ball spin can be calculated.

Note that any ball markings can be used.

Ball spin for Putts

Measured ball spin when putting is done without the requirement to use ball markings.

 

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Spin Dot / Ball Logo Detection issues

In order to detect the spin dots on the ball or ball logos, the images should be sharp and clear.

In order to achieve this, the camera exposure time has to be fast (i.e. around 150 us) with bright lighting.

If the exposure time is too long (i.e. 300 us plus) then image blur will occur and the dots or markings

on the ball will appear faint or washed out.

 

Click above to read more about ball spin detection theory...

Ball Spin Adjustments

Use the spin slider bars in the "Shot Videos" panel to adjust all spin parameters.

Defaults are 100%

The sliders appear when moving the mouse over to the right side of the panel.

Note that back spin adjustments are separate for irons and woods

Click on the club image to select either an iron or a wood (drivers or Hybrids).