VanApp Blog

2016.06.24

Dr. Swing

How to use Dr. Swing

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How to use Dr. Swing, the golf swing video analysis app

Watch Swing
Compare Swings
Create Swing
Modify Swings
How to Use Other Functions

Watch Swing

Swing List Screen

It will display when you start the app.
(1) Switch between “My swings” and “Model Swings” lists.
(2) Show the screen that displays app information, etc.
(3) This is the swing list. Tap on a swing to show it. The gray characters indicate the date and time when the swing was created.
(4) Create a new swing.

Swings that you add will be added to “My swings” (there are sample swings immediately after you install the app).
In “Model Swings,” you can find exceptional swings that serve as models.

Swing Display Screen

(1) Return to previous screen.
(2) Swing title.
(3) Open menu. You can modify, export, and delete swings.
(4) Playback position display slider. Drag it to move the playback position.
(5)/(9) Go to the previous/next address, top, impact, or finish.
(6)/(8) Go to the previous/next frame.
(7) Compare with another swing.

The left edge of the slider is the address position, and the right edge is the finish. The two marks in between them are the top and impact.

The drawing that overlaps with the video and follows the skeletal structure is called the “Skeleton.” The points that display the joints is called the “Joint.” The line is called the “Bone.”

Compare Swings

Swing Comparison Selection Screen

This is the screen for selecting which swings to compare. It will show when you tap the “Compare” button on the swing display screen.
The right percentage is the “similarity ratio,” which indicates the degree to which the swing is similar to the one it is being compared to.
With the similarity ratio, you can easily find similar swings, that is, models that will suit you. It also will help you check your learning progress.

Swing Comparison Display Screen

(1) The similarity ratio with the displayed frame. You can easily tell which parts of a swing are good or bad.
(2) Switch background videos. When comparing to a swing with no video, nothing will be displayed in the background.

When comparing swings, several adjustments will be made automatically so that a more effective analysis is possible.
• To offset differences in video shooting conditions, the skeleton positions are matched.
• To offset differences in physique, the skeleton is made bigger or smaller to match the physiques.
• To offset differences in speed, playback speed is adjusted so that the top and impact times are matched.
With the adjustments above, you can compare forms without having to worry about differences in physique or power. Furthermore, when replaying swings, you can clearly discern differences in rhythm, an important element.

Create Swing

Video Preparation

The video of the swing will be captured by the camera of your iPhone/iPad. Make sure to film in slow motion.
When filming from face-on / back, film from a location that is as far as possible from the position of the hands during address and the direction directly perpendicular to the trajectory of the ball.
When filming from up-the-line / down-the-line, film from a location that is as far as possible from the position of the hands during address and the direction directly parallel to the trajectory of the ball.

Swing Creation

This is the swing property settings screen. It will appear when you tap the swing creation button and select a video.

Face on: front of body angle (recommended)
Back: back of body angle
Up the line: angle from the front of the ball’s trajectory
Down the line: angle from the back of the ball’s trajectory (recommended)

Skeleton Adjustments

This is the screen for adjusting the skeleton with the video.
(1) Decide on the address after matching the playback positions and adjusting the skeleton. Next, decide on the top, impact, and finish in the same way.
(2) Joints can be moved by dragging them with one finger. With two fingers, you can zoom into and out as well as move the video.
(3) Clear skeleton adjustments you have made with the displayed frame.

Joint supports the following positions: sole of left foot, sole of right foot, left knee, right knee, left hip, right hip, left shoulder, right shoulder, left elbow, right elbow, hands, club heel, tailbone, and neck.
Since the tailbone and neck joints are automatically positioned, they cannot be moved.

Address: right before the club head moves
Top: right before the club head enters the downswing
Impact: the moment the club head hits the ball, or right before it hits the ball
Finish: when the shaft is parallel to the ground

Tips for when adjusting the skeleton:
• Position the joints above their rotation centers.
• Adjust joints so that they are as close as possible to the center line of the body part that the bone corresponds to.

Once you decide the position of the address, top, impact, and finish, you can no longer change it. (You can modify the shape of the skeleton.)
Since all other frames can be freely added, deleted, or modified at any time, after completing a rough setup, you can very efficiently analyze your swings by increasing your precision as needed.

When you have decided on the finish and completed modifying the skeleton, please tap the “save” button. Tapping the return button will bring you back to the previous screen without saving.

Modify Swings

You can modify swings from the menu on the swing display screen.
Frames with adjusted skeletons are displayed as green dots on the slider.
The “Previous” and “Next” buttons can also take you to such frames.

How to Use Other Functions

Export & import

From the menu on the swing display screen, you can export swings and share them via email and online storage.
When you open exported swings in Mail or Safari, the swings will be added to “My swings” on Dr. Swing.

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