A data collection device includes a camera and a processing arrangement configured to capture at least two images of a medicament dose indicator of a medicament delivery device in each of the at least two images the processing arrangement identifies a displayed dosage using a first character identification technique, in each of the at least two images, determines whether the displayed dosages in the images are different and, if not, identifies at least one character in the images using a second character identification technique and determines the medicament dosage amount indicated by the medicament dose indicator based thereon. The first character recognition technique may be, for example, an optical pattern recognition or correlation, may be less computationally intensive than the second character recognition technique, for example, an optical character recognition (OCR). In another embodiment, the first and second character recognition techniques are different OCR processes.