Processing path generating method and device

A processing path generating device, comprising:

• an image-capturing device, disposed on a processing machine;
• and
• a processing device, configured to control the processing machine to move the image-capturing device to a first position of a region of interest to perform an image-capture on a workpiece, so as to obtain a first image, and to move the image-capturing device to a second position to perform the image-capture on the workpiece, so as to obtain a second image, wherein the processing device obtains a first edge characteristic and a second edge characteristic of the workpiece according to the first image and the second image, fits three-dimensional edge information of the workpiece according to the first edge characteristic and the second edge characteristic, and generates a processing path according to the three-dimensional edge information;
• wherein the processing device performs an edge point gradient operation on the first edge characteristic and the second edge characteristic, so as to determine a plurality of edge characteristic points of the workpiece, the processing device performs a characteristic point screening on the plurality of edge characteristic points, so as to obtain a plurality of discrete characteristic points, the processing device calculates the plurality of discrete characteristic points to generate discrete information of the workpiece, the processing device obtains depth information of the workpiece according to the first edge characteristic and the second edge characteristic, and the processing device fits the three-dimensional edge information of the workpiece according to the edge information of the workpiece and the depth information of the workpiece.