Cyclic Fine Change Sensing Method by Using Synchronized Image Input.

An object shape is changed by cyclic physical excitements, for example, sunlight in nature or vibration in factory. The change of shape is very fine and also cyclic. A new method is given for detecting edge movements of a cyclic moved object by cyclic physical excitements. The movement is very fine in a pixel on the image sensing device in a CID (Charge Injection Device) camera, but can be sensed by synchronized image input as cyclic edge movements of object. Every cycle has two images. One is with the excitement and another is with no excitement. The difference between the two images is calculated and these differences are summed 8 times. The summation has 64X128 matrix and shows the edge movement of a moved object. A conventional method with asynchronized image input gives 0.1 pixel resolution. The new method with synchronized image input gives 0.036 pixel resolution.