Automatic payment system

An automatic payment system comprising:

• conveyer stages arranged along a conveying route on which products are moved;
• at least one camera configured to obtain images of products by capturing at least a portion of a conveying route;
• an event detection sensor configured to measure the weight of a product on the conveyer stages;
• and
• a controller configured to recognize products on the first conveyer stage based on the images obtained by the at least one camera, and generate payment information for the recognized product,
• wherein the controller generates an event detection signal for a product on the conveying stages based on the weight measurement result by the event detection sensor, generates an image signal for the product for which the event detection signal was generated by controlling the at least one of camera, and provides a user alarm when payment information for the product corresponding to the image signal does not exist.

A computer device communicating with at least one camera and at least one weight measurement sensor through a network, the computer device comprising:

• a communicator;
• and
• a processor configured to communicate with the at least one camera and the at least one weight measurement sensor through the communicator,
• wherein the processor is configured to allow:
• a first image captured to be received by the at least one camera,
• a product object to be recognized from the first image,
• payment information for the recognized product object to be generated,
• an event signal to be generated when detecting that the product object is picked up based on the weight measurement result of the at least one weight measurement sensor,
• a second image comprising the product object to be obtained in response to the event signal by controlling the at least one camera to capture an image, and
• a user alarm to be provided when payment information for the product object in the second image does not exist.