Abstract: A calibration method (1) for a recording device (2). The method includes receiving, with a data interface (11) of a data processing system (3), a first data set (21) with an image and three dimensional information generated by the recording device (2). At least one person (4), within a field of view (8) of the recording device (2), is detected with an object detection component (12). Two or more attributes (5), of the person (4), are determined by an attribute assignment component (13). The attributes include an interest factor for an object and a location of the person (4). A descriptor (9) is generated based on the determined attributes (5). The data processing system calculates an attention model with a discretized space within the field of view based on the descriptor(s). The attention model is configured to predict a probability of a person showing interest for the object.