1. A method for detecting a moving object in a sequence of images captured by a moving camera, comprising the steps of constructing a multiple number of difference images by subtracting image values in corresponding pixels of multiple pairs of images being based on captured images and retrieving a moving object by extracting spatial information of pixels in the multiple number of constructed difference images having relatively large image values, wherein, in the construction step, an image from a pair of images is a representation of a high resolution image having a higher spatial resolution than original captured images on which the high resolution image is based.