Abstract: A processing device is configured to obtain a sequence of images of a scene captured by an image sensor, determine an analysis area for an object in a respective image in the sequence of images, and process the respective image within the analysis area for detection of predefined features of the object. The processing device is further configured to receive pose prediction data, PPD, which represents predicted poses of the object as a function of time, and to determine the analysis area based on the PPD. The PPD may be given by three-dimensional poses of the object that have been determined in the system based on images from a plurality of image sensors in the system. The PPD facilitates detection of features of individual objects in the images even if the objects are occluded and/or crowded.

Abstract: A video camera comprises an image sensor for capturing image data of image frames of a video stream; an image buffer for buffering image; and circuitry. The circuitry executes: a first evaluation function to evaluate a subset of image frames in the video stream by evaluating data pertaining to the subset of image frames and to output a corresponding first evaluation result, wherein the evaluation of an image frame has an evaluation time larger than 1/fps for the video stream; a buffer function to, for each image frame being, mark the image frame as being under evaluation and indicate to the image buffer to buffer image data of the marked image frame; and a second evaluation function to access the image buffer to evaluate image data of each of the subset of image frames based on the corresponding first evaluation result and output a corresponding second evaluation result.