Image analysis method and related surveillance apparatus

An image analysis method performed in a surveillance apparatus comprising an image receiver and an operation processor, the image analysis method comprising:

• the operation processor controlling the image receiver to receive a plurality of image frames, wherein the plurality of image frames comprises a first image frame and at least one second image frame, each of the first image frame and the at least one second image frame comprises a first feature block, and a definition of the first feature block of the first image frame is different from a definition of the first feature block of the at least one second image frame;
• and
• the operation processor taking the first feature block of the first image frame and the first feature block of the at least one second image frame as training samples for training an image analysis model when the operation processor determines the first feature block of the first image frame meets a preset condition.