Google Vision Photo Tagging Sample

Screen Shot 2016-07-22 at 3.45.49 PMWe did a sample of photos at the Scott Coffee Race to test the Google Vision rates of reads (accomplished within several minutes of uploading photos). Check out a couple of the sample Google Vision got right on these screenshots – impressive.

100 Photos

119 Correct Tags

16 Incorrect Tags

32 Additional Tags that a human could read

5 Tagged with 2016 (the year was on the bib)

Screen Shot 2016-07-22 at 3.48.08 PM.png

Screen Shot 2016-07-22 at 4.32.05 PMRaces using the platform will need to decide whether to hire humans (or have Mechanical Turk provide the humans) to manually tag and correct errors, or whether to allow for crowdsourcing.

Tag reading is very dependent on the photos, angle of bibs and color mix. For example, this race had far worse reads. For that race, the bibs were harder to read from a positioning and font and reflection perspective. The results were:

  • 50 Correct Tags (example 235, 211)
  • 15 Incorrect tags (example 42)
  • 17 Missed Tags that a Human would be able to see
Screen Shot 2016-07-22 at 4.32.23 PM
Missed Read

Hints for best Read Rates:

  • Large numbers with white space around the number. Do not crowd the number with sponsor logos.
  • White background and Dark font is best.
  • Camera angle as directly in front as possible – sideways numbers do not read as well.
  • High quality images.
  • The larger the number appears in the photo, the better. Zoom in with a good lense to get runners filling the view.

As time goes on, RunSignUp will be able to do some filtering (for example seeing repeated 2016 across multiple times and eliminate it), and Google Vision will obviously get better.

Author: RunSignUp

RunSignUp is the leading innovator of online tools for race registration, race day solutions, and running clubs. Services include RunSignUp for registration, RunSignUp Go for Race Day, RunSignUp RD Go for Timers, RunSignUp Clubs to enable membership management, and RaceJoy for mobile experiences. More than 10,000 race directors, timers, running club officers and running stores use these services today, including leading organizations like the Boilermaker Road Race, Crim Festival of Races, Pittsburgh Three Rivers Marathon, Inc., Fifth Third River Bank Run, Blacklight Run, Bubble Run, Night Nation, Mercedes Marathon, Kentucky Derby Festival, Leone Timing, KC Running Company, Compuscore Timing, Knoxville Track Club, Pikes Peak Road Runners, Gulf Coast Runners, Columbus Running Company, Playmakers Running Store and many more. In 2015, over 10,000 races used the system to register more than 2.7 million participants. In 2016 over 14,000 races will use the system to process over 4.3 million paid registrations. Services are free except for processing fees when conducting monetary transactions such as race registration or club membership renewal. RunSignUp is founded by runners for runners, using technical capabilities to bring the power of cloud computing to benefit the running community. For more information, visit

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