Keshu Yang.

Badminton, racket stringing, Badminton Speed Meter, and photography. Shanghai to San Diego.

Student, Canyon Crest Academy San Diego, CA
Start here Open lab
MVP Spring 2025 CCA badminton team.
200 Rackets strung for teammates and nearby players.
Lab Badminton Speed Meter turns practice video into a speed estimate.
5 Scholastic-recognized photographs: 2 Gold Keys and 3 Honorable Mentions.
1st Regional high school chess competition with CCA.
4 yrs School choir, including a district first place.

Badminton Speed Meter started after practice.

I wanted a better answer than “that looked fast,” so I started building a tool that uses phone video to estimate shuttle speed. The hardest part has been matching a normal phone clip to the real court well enough that the number is worth using.

What it doesUpload, mark impact, calibrate the court, estimate speed.
My roleIdea, speed math, mini-program, and web app.
Still improvingCalibration when the camera angle is not ideal.
Open the lab Why badminton matters
Impact speed 187.4 km/h