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Ms. Toad

(38,829 posts)
10. Ballots are designed so that the bubbles on one side don't bleed into reading channels
Wed Nov 4, 2020, 03:02 PM
Nov 2020

on the back.

As to the front there are two primary means of reading.

One scans the entire ballot and then snips the votes out of the entire image. The other scans the locations where bubbles are expected to be.

In both cases, the counting technology focuses on the center of the bubble and counts darkened pixels in the bubble image. Bleed from an adjacent bubble would not bleed far enough into the adjacent bubble to count - and if it did, the machine would register an overvote and the voter would be given the option to remark a clean ballot to correct the overvote.

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