A three-month trial of a new police facial recognition app which prompted a legal challenge will get under way this month.
South Wales Police has said it will give 50 officers the app.
The force’s use of facial recognition technology prompted a legal challenge by a man whose picture was taken by officers while he was out shopping.
Some other forces have already trialled the technology including the Metropolitan Police.
The BBC has learned that the app uses facial recognition technology provided by the Japanese firm NEC, but that the software’s user interface was designed in-house by the police force itself.
Civil rights group Liberty said it was "shameful" the South Wales force was using the technology while court cases were ongoing.
Officers have been using automatic facial recognition (AFR) technology to map faces in a crowd by measuring the distance between facial features, then comparing results with images on a "watch list".
Deputy Chief Constable Richard Lewis said: "This new app means that, with a single photo, officers can easily and quickly answer the question of 'are you really the person we are looking for?'.
"Officers will be able to access instant, actionable data, allowing to them to identify whether the person stopped is, or is not, the person they need to speak to, without having to return to a police station."
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