Abstract: Object detection apparatus in which images from an ordered series of images are processed to detect objects, each image having an associated image period, the detection of objects in a whole image requiring a set of processing tasks to be carried out comprises means for executing subsets of the set of processing tasks during respective image periods associated with a group of two or more images from the ordered series; the subsets being arranged so that substantially all of the set of processing tasks are carried out in the course of the image periods associated with the group of images and that each such task is carried out with respect to at least one respective image in the group of images.

Abstract: Face detection apparatus generating an output indicative of the likelihood of test regions of a test image containing a face comprises: means for deriving a plurality of sets of image attribute data from the test region, each set relating to the test region scaled by a respective different scaling factor from a geometric progression of scaling factors, the progression being such that each scaling factor is related to a next scaling factor by a predetermined multiplicative factor, the factor being the same across the whole progression of scaling factors; means for comparing the derived attributes for each scaling factor with a first respective set of attributes indicative of the presence of a face to generate a first respective likelihood value; means for comparing the derived attributes for each scaling factor with a second respective set of attributes indicative of the presence of a face to generate a second respective likelihood value; means for generating a combined likelihood value in respect of at least

Abstract: Video face detection apparatus in which a test image from a video sequence is compared with an image property model derived from image properties of a region detected to contain a face in a preceding image in the video sequence comprises: