1. An object detection system for detecting an object in an image, the image comprising a plurality of image pixels, the object detection system comprising: a memory to store instructions; and a processor responsive to stored instructions to perform the steps of: computing one or more feature planes of one or more types for each image pixel of the image; defining a plurality of cells in the image, each cell comprising first through n th number of pixels, and starting locations of each cell in the image in horizontal and vertical directions being integral multiples of predefined horizontal and vertical step sizes, respectively; computing one or more feature plane summations of one or more types for each cell of the plurality of cells, wherein a feature plane summation of a type for a cell is computed by summing corresponding features of the first through n th number of pixels of the cell, n being an integral number; determining a feature vector for an image portion of the image, the feature vector comprising a set of feature plane summations of one or more cells defined in the image portion; and comparing of the feature vector with a corresponding object classifier to detect a presence of the object in the image portion of the image.