Automatic object tracking system and automatic object tracking method

An automatic object tracking system, comprising:

• a handheld mobile device, comprising:
• a microprocessor, configured to perform an object tracking mode;
• an image capturing unit, electrically connected to the microprocessor, and configured to capture image capturing data in an image capturing direction and transfer the image capturing data to the microprocessor;
• wherein the microprocessor defines a horizontal coordinate axis and a vertical coordinate axis perpendicular to each other in the image capturing data, defines a length of the image capturing data along the horizontal coordinate axis into a plurality of horizontal units, and defines a height of the image capturing data with respect to the horizontal coordinate axis into a plurality of vertical units;
• a memory unit, electrically connected to the microprocessor, and configured to store the image capturing data;
• a touch-control display panel, electrically connected to the microprocessor, and configured to display the image capturing data, receive a touch control operation, and feedback the touch control operation to the microprocessor;
• and
• a first communications interface, electrically connected to the microprocessor;
• and
• a tracking dock, comprising:
• a controller;
• a second communications interface, electrically connected to the controller, and configured to establish a communications link with the first communications interface to receive a turning command and transfer the turning command to the controller;
• and
• a turning module, electrically connected to the controller, and configured to support the handheld mobile device;
• wherein the controller drives the turning module according to the turning command to turn, to change the image capturing direction of the image capturing unit;
• wherein in the object tracking mode, the microprocessor recognizes a feature object from the image capturing data, sets a sampling frame around the feature object to enable the sampling frame to surround the feature object, and moves the sampling frame as the feature object moves;
• and the microprocessor sets a reference point in the sampling frame;
• wherein the microprocessor calculates a horizontal distance and a vertical distance between the reference point and a target coordinate;
• when the horizontal distance is larger than a horizontal threshold, the microprocessor sends the turning command to drive the turning module to change the image capturing direction, to move the reference point towards the target coordinate horizontally by at least one horizontal unit;
• and when the vertical distance is larger than a vertical threshold, the microprocessor sends the turning command to control the turning module, to move the reference point in the image capturing data towards the target coordinate vertically by at least one vertical unit;
• and
• wherein when a plurality of feature objects is recognized, the microprocessor sets sampling frames for the feature objects respectively, chooses, according to a required tracking quantity in descending order of area, sampling frames meeting the required tracking quantity, sets an auxiliary frame surrounding the chosen sampling frames, and sets, by using the auxiliary frame as a range, the reference point between the sampling frames, to perform the object tracking mode.