Abstract: An active protection system for protecting an object includes a first lens, a second lens, a processing unit and an alarm unit. The first lens is configured to receive first light and generate a first image. The second lens is configured to receive second light and generate a second image. The processing unit is configured to obtain a characteristic value of the object from the second image, determine whether the characteristic value reaches a pre-set value, and judge whether the object is regulated in a predetermined period after the characteristic value reaches the pre-set value. The alarm unit is configured to raise an alarm under control of the processing unit if the object is not regulated in the predetermined period after the characteristic value reaches the pre-set value.

Abstract: A scanner with a detachable mechanism to release jammed paper includes a base a, a pickup roller, a pickup mechanism and a scanning module. The base includes an accommodating space and a feeding slot connected to the accommodating space. The pickup roller is rotatably disposed in the base and positioned between the accommodating space and the feeding slot. The pickup mechanism is disposed in the base and adjacent to the pickup roller. The scanning module is detachably disposed in the accommodating space. The scanning module forces the pickup mechanism against the pickup roller when the scanning module is placed in the accommodating space. A pressure exerted on the pickup roller by the pickup mechanism is released when the scanning module is removed out of the accommodating space.