Abstract: A cascade object classification structure for classifying one or more objects in an image is provided. The cascade object classification structure includes a plurality of nodes arranged in one or more layers. Each layer includes at least one parent node and each subsequent layer includes at least two child nodes. A parent node in a layer is operatively linked to two child nodes in a subsequent layer. Further, at least one child node in one of the subsequent layers is operatively linked to two or more parent nodes in a preceding layer. Each node includes classifiers for classifying the objects as a positive object and a negative object. The positive object and the negative object classified by the parent node in each layer are further classified by one or more operatively linked child nodes in the subsequent layer.