| 摘要 |
A method of tracking an object moving relative to a scene includes generating a background image from a plurality of images of the scene, dividing each image into a plurality of background image elements, determining a value of a characteristic of each said background image element for each image to obtain a set of values, and determining from the set of values a background value for each of the background image elements, then acquiring a pair of comparison images, dividing each comparison image into a plurality of comparison image elements and determining a comparison value of said characteristic for each of said comparison image elements, comparing each said comparison value with said background value of said corresponding background image element to thereby determine whether or not each said comparison image element is sufficiently similar to the corresponding background image element, and determining from which comparison image elements are not sufficiently similar to the corresponding background image element which comparison image elements relate to objects and determining a spatial characteristic of each said object, wherein objects in said pair of comparison images are matched by comparing spatial characteristics of objects of a following image of said pair of comparison images with spatial characteristics of objects of a preceding image of said pair of comparison images to match objects in the following image to objects in the preceding image. Each matched object is treated as a moving object to thereby track the movement of each said moving object relative to said scene. |
