Method for automatic contour extraction and path generation of bitmap

Abstract

The present invention discloses a method for automatic contour extraction and path generation of a bitmap. The method comprises the following steps of (1) reading the bitmap file, and storing the read data; (2) converting the bitmap file into a grey-scale map; (3) selecting a binarization algorithm to perform binarization processing; (4) performing contour extraction preprocessing; (5) performing contour extraction; and (6) obtaining cutting path generation. According to the method, the cutting path can be generated by the bitmap file without participation of professional designers or with participation of only a few professional designers, complexity of cutting path generation is reduced, generation efficiency and accuracy of the cutting path can be largely improved, cutting precision and automation degree are increased, and the method has good prospect of promotion and application.

Description

technical field [0001] The invention belongs to the field of numerical control cutting, and relates to a technology for extracting contours from bitmaps, in particular to a method for automatic contour extraction and path generation from bitmaps. Background technique [0002] At present, CNC cutting machines have been widely used in luggage, clothing, leather, bathroom, decoration, printing and advertising industries. From the perspective of cutting methods, they can be divided into two types: one is that no positioning is required before cutting, and designers directly Use CAD / CAM software to design various patterns on the computer and save them as vector files. The cutting machine control software will directly generate cutting paths from the corresponding vector files and perform cutting. This type of cutting is suitable for traditional clothing, leather, bags, paper Die, three-dimensional splicing and other application scenarios; the other is to realize the customization...

AI Technical Summary

Problems solved by technology

[0003] For the above-mentioned first cutting type, the designer originally needs to design the cutting content, so the participation of professional designers is necessary; for the second cutting type, the cutting content has been determined by the given bitmap information , but ordinary cutting equipment cannot directly generate cutting vector paths from bitmap files, and professional designers are still required to manually participate in the generation of vector paths, which is time-consuming and laborious, and the generated vector paths will vary with different designers. Such subtle differences will be directly reflected in the actual cutting, resulting in inconsistencies in the cutting results

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