Three-dimensional coordinate measuring method based on single-camera two-color linear structured light

The invention relates to a three-dimensional coordinate measuring method based on single-camera two-color linear structured light, which comprises the steps of calibration of a camera, calibration of a light plane and solution of a three-dimensional coordinate, wherein the calibration of the camera is that: a corresponding relation between a pixel coordinate on an image and a space line forming an image point is established to obtain a continuous mapping inside an entire measuring space; the calibration of the light plane is that: in order to obtain a red-blue linear structured light three-dimensional space equation, a pixel coordinate of a red-blue linear structured light image is obtained on two calibrated images and is converted to a corresponding space three-dimensional coordinate; and the solution of the three-dimensional coordinate is that: a central pixel coordinate of the red-blue linear structured light is searched on a photographed color image, and a space linear equation is established and solved to obtain the space three-dimensional coordinate. Compared with a traditional three-dimensional measuring method, the three-dimensional coordinate measuring method has the advantages of large data collection amount, low cost, small data transmission amount, no need of registration of the data collected by multiple cameras, and capability of eliminating the background interference by a green component in the image so that the measurement is not sensitive to ambient light.