Practice log entries tagged vision research

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29th May 2018

Stephen Meschke

# vision research, 1 minutes

https://imgur.com/a/LlK4t3w
https://imgur.com/a/eXHvPvB

Total practice time: 1 minutes

Location: Linux

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1st May 2018

Stephen Meschke

# vision research, 1 minutes

I have dropped more recently than ever before: https://imgur.com/a/7nW4C44

Total practice time: 1 minutes

Location: Linux

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6th April 2018

Stephen Meschke

# vision research, 4 clubs, balance, 1 minutes

I hurt my elbow training handstands on Wednesday. Did light juggling today because it still hurts pretty bad. Went from 4ftn clubs to 3cas+bal back into 4ftn (for the first time). I was really happy about it until I saw the video. It looked really sloppy. Definitely a cool trick though.

Worked on juggling data set too: https://sites.google.com/view/jugglingdataset/juggling-tricks

Total practice time: 1 minutes

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10th December 2017

Stephen Meschke

# vision research, 1 minutes

Project Goal: Create an app that guides a juggler though a training session. There are two lesson options, ball juggling lesson and the club juggling lesson. The ball juggling lesson takes users from warmup to 7b cascade. The club juggling lesson takes users from warmup to 5 club cascade.


Home
practice logs
ball juggling lesson
warmup
3b
4b
5b cascade
5b cascade high throws
5b patterns: 77722 and 7777700
7b cascade
club juggling lesson
warmup
3 club
4 clubs
5 club cascade

Total practice time: 1 minutes

Location: Linux

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9th December 2017

Stephen Meschke

# 3-6 balls, vision research, 1 minutes

Making a juggling app for android. After two and a half painfully slow courses from Udacity, I made a multi-page app for juggling training.

How the app works:

  • The app displays the text, "Juggle three balls." When the user taps a button, a song plays.
  • When the song finishes, the app displays the text, "Juggle 4 balls. A song plays when the user taps a button.
  • This continues for several songs.


Training with an app like this is definitely better than just training with music. The app controls practice structure, and I can focus on juggling.

Total practice time: 1 minutes

Location: Linux

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27th November 2017

Stephen Meschke

# vision research, 1 minutes

Cuttlefish filter for juggling videos: https://imgur.com/a/ooFfx

Psudocode (for OpenCV):

  • Convert the BGR image to HSV
  • Split the image into three channels: hue, saturation, and value
  • Change hue, and leave saturation and value alone
  • Merge channels
  • Convert back to BGR

Total practice time: 1 minutes

Location: Linux

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25th October 2017

Stephen Meschke

# vision research, 1 minutes

One of my vision research goals is to detect which pattern is being juggled.

Using Keras and Tensorflow, I have been able to determine the pattern that is being juggled with an accuracy of 0.9766667.

The model is only trained with 4 three ball patterns, but it's a start.

Link to the tutorial that I used: https://www.learnopencv.com/image-classification-using-feedforward-neural-network-in-keras/

Link to what the images look like after pre-processing: https://imgur.com/a/M195A

Total practice time: 1 minutes

Location: Linux

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10th July 2017

Stephen Meschke

# vision research, 1 minutes

I have been thinking about the injury that Peter Bone sustained while juggling: link to thread about topic. I want to provide him with the best text based remote diagnosis over the internet possible, so I have done some research into his injury.

Using the same tracking programs from the Juggling Data Set, I created this: pose estimation of 2 ball juggling.

I am not sure how to interpret this, but I believe that it would be useful to show that just after a ball is caught, the tricep fires, pulling the hand down. This rapid downward movement of the hand can put lots of pressure on the ulnar collateral ligament if the bicept is not relaxed.

My diagnosis is a torn UCL, and my treatment recommendation is ulnar reconstructive surgery (also known as Tommy John Surgery) where a ligament is taken from the leg of a cadaver and implanted into the arm. Tommy John Surgery is used effectively for Major League Baseball pitches, who often see in increase in velocity after the surgery.

Total practice time: 1 minutes

Location: Linux

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1st July 2017

Stephen Meschke

# vision research, 1 minutes

Going from graph to siteswap:

http://imgur.com/a/dpZD3 (the patterns are 5550,552, and 744)

Found that most throws are within 2% of predicted siteswap value.

Total practice time: 1 minutes

Location: Linux

Comments (0)

30th June 2017

Stephen Meschke

# vision research, 1 minutes

Camshift Tracking + Kalman Filter: https://youtu.be/430lPkbvmc0

Having trouble with these lines:

kalman = cv2.KalmanFilter(4,2)
kalman.measurementMatrix = np.array([[1,0,0,0],[0,1,0,0]],np.float32)
kalman.transitionMatrix = np.array([[1,0,1,0],[0,1,0,1],[0,0,1,0],[0,0,0,1]],np.float32)
kalman.processNoiseCov = np.array([[1,0,0,0],[0,1,0,0],[0,0,1,0],[0,0,0,1]],np.float32) * .002

Total practice time: 1 minutes

Location: Linux

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