Stereo 3D vision cameras
Standard CX 2 cameras can be setup in 3 ways
1. Classic X,Y
The Classic X,Y is the standard setup with one camera at floor level pointing across the enclosure left to right (the Vcam)
- to capture the vertical launch and speed of the ball -
and other (the Hcam) mounted on the ceiling on the center line pointing straight down - to capture the ball path, left or right.
Advantage: Greatest FOV (field of view) for both ball height and path. Disadvantage: cameras are more time consuming to calibrate
2. Parallel stereo
This method has both cameras mounted on the ceiling - some 60cm / 2ft apart - and pointing straight down
Advantage: Easier to calibrate. As cameras are only 60cm / 2ft apart the system can be enclosed in one case (the CX Surround case)
Disadvantage: Limited FOV
3. Converging stereo
This method has both cameras mounted on the ceiling but 8 to 10 ft apart and pointing inwards to the enclosure center line
Advantage: Easier to calibrate. Greater FOV than the parallel setup. Disadvantage: FOV still more limited than the X,Y setup
CX Surround 3D stereoscopic ball and club tracking
The CX Surround has all cameras and lights built into one long (8ft) case
CX Surround : $ 4,999
3 camera ball and club tracking - calculated spin and spin axis
CX Surround B: $ 5,999
4 camera ball and club tracking- measured spin and spin axis
CX Stereo using standard H and V cam converging cameras
Available in both Lux and Standard casings
CX Stereo : $ 3,999 Std. Casing
CX Stereo : $ 4,999 Lux. Casing
3 camera ball and club tracking - calculated spin and spin axis
CX Stereo B: $ 4,999 Std. Casing
CX Stereo B : $ 5,999 Lux. Casing
4 camera ball and club tracking - measured spin and spin axis
All CX Stereo systems come complete with built-in IR Lighting, full frame cameras, power supplies, cables and a line scan trigger camera.
System includes TGC 15 course software plus RC single course software !
CX Stereo / CX Surround club tracking options
The system is avalable with 3 types of club tracking cameras
1. Single monochrome camera club tracking - motion trace -club face angle, club path and speed
2. Dual color camera club tracking - freeze frame - club face angle, club path and speed
3. Optical sensor tracking
Vcam/Hcam conversation to stereoscopic vision
Current users of the classic X,Y Vcam and Hcam ball tracking system can simply convert their cameras to stereoscopic vision systems too at no extra charge
Some amount of calibration will be required though. Instructions on how to do this are published on the link below.
CX Surround / CX Stereo Q & A
How does the GSA Golf CX Surround / CX Stereo compare with the GC Hawk?
i.e. is the GSA Golf Surround a poor man's GC Hawk like the SkyTrak is a poor man's GC2?
Well, I'm sure many will make this comparison and - in fact - we do too.
At present we don't have enough information about the GC Hawk to make a direct comparison but it would appear that the two systems are quite similar.
Both systems use a stereoscopic method to determine ball launch angle, speed and path and are ceiling mounted.
Does the GSA CX Surround also detect club head data?
Yes it does.
The CX3 Surround and CX3 Stereo feature a 3rd camera dedicated to this task.
From what I hear, the GC Hawk at present does not detect any club data.
Does the GSA CX Surround / CX Stereo also detect ball spin?
As such no, but our a Bcam system ball spin cameras can easily be added to it.
I'd be interested to see how the GC Hawk measures ball back spin from cameras mounted on the ceiling viewing the ball from above though.
Especially with the balls not having any markings on them and the cameras - in contrast to the GC2 that is only 2ft away and viewing the ball from the side where back spin rotation can easily been seen -
the GC Hawk is mounted some 9 or 10ft away on the ceiling and viewing the ball from above where back spin rotation is very difficult to detect even with markings let alone without markings.
The above images show how back spin can easily be seen when viewing the ball from the side (as does the GC2 and our Bcam system). Viewing from the side, a full 360 degrees of rotation can be seen and thus spin rate measuring accuracy will be high.
In contrast, if viewing the ball from above, the max amount of rotation viewable by the camera would only be around 30 or 40 degrees before the reference markings (virtual or real) would rotate backwards out of view of the camera.
Note that the standard method of measuring ball spin with cameras is to grab two images of the ball at a set time delay between the 2 frames.
Image processing then detects a matching marking or dimple pattern in both frames that is used to determine the amount of rotation that ball has made within the frame time delay.
Simple math procedures then determine the spin rate in RPM.
Compared to the side view method, I doubt that the same degree of spin rate measurement accuracy can be obtained with overhead mounted cameras.
What is the difference between the CX Surround and CX Stereo systems?
Just the casing.
However - because the camera mountings are fixed in the CX Surround - we are able to pre-calibrate the cameras saving you the trouble of going through this lengthy procedure.
Other than that, the CX Stereo features the exact same cameras and electronics as the CX Surround but is split into two casings.
However, whereas the CX Surround - due to its single casing - is confined to using a stereoscopic camera setup, the CX Stereo - due to its separate dual camera casings - can also be setup as a standard X,Y system.
What is the difference between the CX Stereo and the CX2?
Just the free software options to run as in a stereo or clasic X,Y configuration.
How does the GSA CX Surround / CX Stereo compare with the GC Hawk price-wise?
Not knowing yet what the price of the GC Hawk will be I can only guess, but all indications are that the GSA CX Surround or CX Stereo will only be around a third or a quarter of the price of the GC Hawk.
At present - and based on Foresights other product prices and a few golf sim forum - I'm estimating that the GC Hawk will be in the $15,000 to $18,000 range while the CX Stereo / CX Surround is in the $3,500 to $5,000 range.
Click above to read more about the CX Surround
Click above to read more about the CX Stereo
3 optional camera setup configurations
1. Classic X,Y 2. Parallel stereo 3. Converging stereo
The above video is from customer Keith showing putting using the new Converging stereo setup.