In addition to PIE, avoidance of facial occlusion is also important. Threshold is actually another optional parameter that can be entered into the API, if the use case of your app requires it set at a level other than 0.60.Įxample: “If you are verifying a secure financial transaction, the threshold should be 0.9 and upwards". If all confidence levels are lower than 0.60 then the API would say that there is no match, and return no list of potential subjects (names).
#M ARY THRESHOLD DETECTOR OPTISYSTEM SOFTWARE#
This tells the API to report a successful match for a face if the software determines that there is a match at a confidence threshold of 0.60 or higher. Kairos' API has set a default threshold of 0.60. 40”, indicating that it is probably a picture of Bob, because we return a higher confidence-threshold than the other faces. For instance it might return the following results for a particular face: “Bob.
#M ARY THRESHOLD DETECTOR OPTISYSTEM SERIES#
High Threshold = Fewer results suitable for business critical uses cases.įor each face found there may be a series of possible ‘identifiers’ (in the Kairos API, we call these ‘subject IDs’) along with the confidence of it being that person depicted.Low Threshold = More results suitable for business non-critical use cases.Face rec software is capable of producing such varying degrees of accuracy because a ‘match’ is essentially a statistical score between two face biometric templates which determine a degree of similarity- with the user controlling the determining degree. In other cases, like “Which celebrity do I most closely resemble” games- threshold doesn’t really matter at all. The likelihood of a match can be increased by implementing a low threshold, as in the case of identifying amusement park goers for their roller coaster photo souvenir- or decreased by implementing a high threshold, as in the case of banking transaction verification.
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Thresholds allow you to tweak a face recognition system based on the degree of accuracy you desire for your individual use case. Depending on what you are looking to achieve this can have an affect on the overall success of your application.
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A threshold, as established by the operating parameters, affects the error rate and therefore the integrity of the matches.