A method of recording a medicament dose using a data collection device comprises capturing, by a video camera of said data collection device, a video showing a medicament dose indicator of a medicament delivery device, adjusting a scale of an image of said medicament dose indicator in said video, adjusting said image for skew of one or more characters displayed on a component of the medicament delivery device in said video, determining the position of at least one of said one or more characters in the image, identifying the at least one character using optical character recognition and determining a medicament dose shown by the medicament dose indicator based on a result of said optical character recognition. The method may include determining whether more than one delivery of medicament is recorded in the video and, if so, whether said more than one delivery includes one or more prime shots, so that an overall dosage delivered to a user may be determined based on multiple determined medicament doses. A wearable electronic device comprising a video camera may be used to obtain and analyse the video, for example, using software provided in an "app". The wearable electronic device may be configured to be worn on the head of a user, to capture the video from the user's point of view.L'invention concerne un procédé d'enregistrement d'une dose de médicament par utilisation d'un dispositif collecteur de données, comprenant la capture, par une caméra vidéo dudit dispositif collecteur de données, d'une vidéo présentant un indicateur de dose de médicament d'un dispositif d'administration de médicaments, l'ajustement d'une échelle d'une image dudit indicateur de dose de médicament dans ladite vidéo, l'ajustement de ladite image pour ce qui est de l'obliquité d'un ou plusieurs caractères affichés sur un composant du dispositif d'administration de médicaments dans ladite vidéo, la détermination de la position dudit ou d'au moins l'un desdits caractères dans l'image, l'identific
