Motion-detection system and motion-detection method

A motion-detection system, comprising:

• a camera, configured to capture a color image and transmit the color image to a pre-processor through a camera interface;
• wherein, in a low-power mode, the pre-processor retrieves a luminance value of each pixel in the color image to generate a luminance image and performs a resolution reduction on the luminance image to generate an input image;
• and
• a storage device, configured to store the input image and transmit the input image to a motion-identifying device;
• wherein the motion-identifying device is configured to identify a motion-object block included in the input image;
• wherein the motion-identifying device calculates an amount of movement of the motion-object block, and when the amount of movement reaches an identification threshold, a system wake-up signal is triggered so as to cause the motion-detection system to enter a normal mode from the low-power mode;
• wherein, in the normal mode, when an object-identifying model determines that an object in the motion-object block is not a predefined object, the motion-detection system enters the low-power mode again, and the motion-object block is transmitted to the pre-processor;
• wherein the pre-processor cuts the input image evenly into a plurality of sub-images and selects a predefined number of sub-images in a randomized manner to input to the storage device;
• wherein the storage device is a low-power static random access memory, a memory, a hard disk, or a USB memory card;
• wherein the motion-identifying device is implemented by software, firmware, or hardware, and the motion-identifying device comprises a computing electronic device.