Display monitoring system for detecting and tracking an intruder in a monitor area

A display monitoring system comprising:

• image pickup means for picking up an image including at least one of an object to be picked up and a background;
• change detecting means for detecting an area in which a portion of the picked-up image changes,
• said change detecting means including
• reference image storage means for storing a background image, as a reference image, which corresponds to the background picked up by said image pickup means,
• difference calculating means for obtaining differences between the reference image and the image including the object and the background, and outputting difference values,
• binarizing means for binarizing difference values higher than a predetermined threshold value, and extracting the binarized values as a plurality of changing areas, and
• labeling means for providing different labels for a plurality of blocks associated with each other as the changing areas, obtaining the area, position of center of gravity, and circumscribed rectangle of each of the blocks, and outputting measurement data;
• tracking means for tracking the changing areas,
• said tracking means including at least one tracking element having
• tracking area setting means which moves upon movement of the block and sets a rectangular area including the rectangle as a tracking area, with the rectangle located in the center of the tracking area,
• small moving direction detecting area setting means for setting a plurality of small areas in the tracking area, and
• moving vector calculating means for calculating movement amounts of the changing areas in accordance with changes in parameter of each of the small areas;
• display monitoring system control means for controlling said tracking means, performing determination of a tracking result, and performing predetermined processing by using the output from said labeling means,
• said display monitoring system control means including
• tracking section control means for controlling said tracking means,
• candidate extracting means for obtaining a virtual association strength between said tracking elements for tracking the changing areas, and extracting each of groups of said tracking elements whose association strengths are higher than a predetermined value as candidates for moving objects, and
• result interpreting means for interpreting extraction results obtained by said candidate extracting means and forming moving paths of the moving object candidates;
• display unit control means for outputting data of the tracking area as data of a rectangular frame;
• first display means for displaying the image picked up by said image pickup means together with the tracking area;
• and
• second display means for displaying an interpretation of the tracking result obtained by said result interpreting means.

A display monitoring system comprising:

• change detecting means for detecting image changing areas in a picked-up image;
• tracking means having at least two tracking elements for tracking the changing areas detected by said change detecting means;
• candidate extracting means for obtaining a virtual association strength between said tracking elements for tracking the changing areas, and extracting each of groups of said tracking elements whose association strengths are higher than a predetermined value as candidates for moving objects;
• and
• result interpreting means for interpreting extraction results obtained by said candidate extracting means and forming moving paths of the moving object candidates.