Patent ID: 6141435
Filing Date: 2000-10-31
Classification: G06K,G06T

Abstract:
An image processing apparatus for extracting objects, in a case where a plurality of stationary objects and a plurality of moving objects are in a series of images which are captured at different sampling times, the objects being classified into plural speed ranges, said apparatus comprising:an image-input unit which inputs each of said images and each including a background and a plurality of said stationary and moving objects;a background image extract unit which extracts said background from each of said images and stores said background;a first average background extract unit which extracts an image that includes one or a plurality of said stationary objects or moving objects each having a first object speed not higher than a predetermined first speed and also includes said background;a second average background extract unit which extracts an image that includes one or a plurality of said stationary objects or moving objects each having a second object speed not higher than a predetermined second speed and also includes said background;a first difference-calculation processing unit which calculates a difference value between an output from said background image extract unit and said first average background extract unit, and then generates a first image which classifies the objects into stationary objects and objects moving at said first object speed;a second difference-calculation processing unit which calculates a difference value between respective outputs from said first and second average background extract units, and then generates a second image which classifies the objects into objects moving at said second object speed classified as a second one of said plural sorts of speed; anda third difference-calculation processing unit which calculates a difference value between an output from said image-input unit and either one of outputs from said first and second average background extract unit, and then generates a third image which classifies the objects into objects moving at a third speed.