There is provided a computer-implemented method of processing object detection data. The method includes receiving, from an object detection system, object detection data comprising a plurality of detection outputs associated with different respective regions of an image, wherein a first detection output of the plurality of detection outputs is associated with a first region of the image and comprises a plurality of received detection characteristics. The method includes processing the first detection output to determine one or more modified detection characteristics of said plurality of received detection characteristics. Processing the first detection output includes retrieving a mapping function and applying the mapping function, where the mapping is dependent upon at least one of the plurality of received detection characteristics.