| abstract |
Detecting status changes in a medicament delivery device. A data collection apparatus comprises: a camera configured to obtaining first and second recordings of at least a portion of a medicament delivery device using a camera, said portion including a first component and a second component, the first component being configured to move relative to the second component as medicament is expelled from the medicament delivery device; and a processing arrangement configured: to determine, from said first and second recordings, positions in the first and second recordings of the first component relative to the second component, and to determine an amount of medicament that has been expelled by the medicament delivery device by comparing the position in the first recording of the first component relative to the second component in the first recording with a position in the second recording of the first component relative to the second component in the second recording, the second recording having been captured at a different time to the first recording. |