| 摘要 |
A supplemental data collection device (2) for attachment to a pen-type injector (1) comprises a camera (25) and a processing arrangement (24) configured to capture at least two images of a medicament dose dial (13) of said injector (1), in each of the at least two images, identify a displayed dosage using a first optical character identification technique, in each of the at least two images, determine whether the displayed dosages in the images are different and, if not, identify at least one character in the images using a second optical character identification technique and determine the medicament dosage amount indicated by the dose dial based thereon. The first OCR technique, for example, optical pattern recognition or correlation, is less computationally intensive than the second OCR technique, such that during the time the user rotates the medicament dose indicator, a real-time dose display which requires less computational resources can be provided, while once the dial has stopped moving, the final dose can be displayed using a more reliable image analysis technique. |
