This is a continuation of an effort to collect a data set of broken QR codes and provide a way to fix broken QR codes. All the QR codes that are uploaded get saved and go into a data set that may eventually be published.

A neat tool, but why is there a network round-trip for every interaction? It means that when your server's running slow, the process is excruciating.

It records where brushes are placed. Which allows for labeling of dataset in great detail. Which might lead to better tool in the future that is more automated.

If it's just for data gathering purposes, couldn't it be asynchronous with the actual editing?