Distance measurement system and method

摘要

A distance measurement method comprising: projecting a light beam having a speckle pattern to at least one reference plane to show a plurality of images with the speckle pattern on the at least one reference plane. The speckle pattern has a plurality of speckles, so as to capture the image with the speckle pattern on the reference plane to obtain a plurality of reference image information. When the object enters the area illuminated by a light source module, an image with the speckle pattern on a surface of an object is captured to obtain an object image information. Then, a plurality of brightness relationships among each of the speckles with adjacent speckles rounding each speckle are computed according to the reference image and the object image information to obtain relative brightness information of each speckle, which is used to compute position of the object.

主权项

1. A distance measurement system, comprising:
at least one reference plane; a light source module, providing a light beam having a speckle pattern to the at least one reference plane and an object, so as to show a plurality of images having the speckle pattern on the at least one reference plane and a surface of the object, wherein the speckle pattern has a plurality of speckles; an image capture device, capturing the image shown on the reference plane to generate a reference image information, and capturing the image shown on the surface of the object to generate an object image information; and a processing module, coupled to the image capture device for obtaining the reference image information and the object image information, calculating a plurality of brightness relationships between each of the speckles and adjacent speckles rounding each speckle in the reference image information and the object image information, and using a predetermined formula to calculate the brightness of each of the speckles and adjacent speckles rounding each speckle, in order to obtain a relative brightness information of each of the speckles, so as to calculate the distance between the distance measurement system and the object according to the relative brightness information; wherein the predetermined formula is a value, which is obtained by dividing the brightness of each speckle by a summation of the brightness of each speckle and the average of brightness of each speckle and adjacent speckles rounding each speckle.