Probability Hough straight line detection-based workpiece surface feature-point-free positioning method

The invention discloses a workpiece surface feature-point-free positioning method based on probability Hough straight line detection, and the method comprises the steps: carrying out the image information collection of a workpiece through employing a binocular vision system, obtaining an edge contour image of the workpiece, extracting a plurality of line segments on the surface of the workpiece through employing a probability Hough straight line detection algorithm, and carrying out the recognition of a plurality of feature points through controlling a detection threshold value and removing interference line segments. The method comprises the following steps: performing straight line fitting by using a least square method, selecting a threshold value according to an actual workpiece straight line included angle, screening out a target straight line, solving two-dimensional pixel coordinate information of an intersection point according to two straight line analytic expressions, and finally inputting solved tw