Automatic fragmentation contour intelligent scanning method for laser marking path

Abstract

According to the invention, firstly, a complex multi-connected region primitive is divided into a plurality of single-connected region primitives, the marking of one complex multi-connected region primitive is converted into marking of a plurality of simple single-connected region primitives, and then convex division is performed on a concave connected region; a single connected region primitive with concave points is divided into a plurality of monotone polygon primitives to adapt to the complex condition of character marking, then monotone polygons are marked, and finally an optimal shortest scanning path is selected by using an intelligent path method; the laser marking method is easy to implement, high in marking speed, short in marking time, high in efficiency, short in empty row distance and small in calculation complexity, scanning lines generated in the marking process are few, the number of times of optical switching is small, the probability that a device is damaged is small, under the condition that it is guaranteed that the number of skipping times and the skipping distance are as small as possible, the path generation time is greatly shortened, and the marking speed and efficiency are improved.

Description

technical field [0001] The present application relates to a road condition analysis method for remote sensing images, in particular to an intelligent scanning method for automatic sliced ​​contours of laser marking paths, which belongs to the technical field of road condition analysis methods for remote sensing images. Background technique [0002] Laser marking has a wide range of applications, and its processing stability is strong and the effect is good. In many fields, laser marking has replaced traditional manual, mechanical and spray printing marking. Laser marking can be applied to semiconductor materials, glass materials, some non-metallic materials and all metal materials, and leaves a long-term mark with anti-counterfeiting function on the surface that is not easy to imitate and modify, and is widely used in various mechanical parts, Metal utensils, electronic components, computer keyboards, auto parts, art advertisements, bags, buttons and other commodities are ma...

AI Technical Summary

Problems solved by technology

[0008] First, the mainstream scanning method in the prior art adopts line scanning, which scans the surface of the marked object line by line, and each scanning path is parallel to each other, including X / Y continuous scanning, bidirectional X / Y scanning and There are three methods of area X / Y scanning. Line scanning, because it generates a large number of scanning lines, will increase the number of jumps and the total length of the jump of the light pen, resulting in a decrease in marking efficiency, and the number of times the light is turned on and off is also large. The damage rate of the device will also increase, and there will be many uncontrollable risks in long-term use;

[0009] Second, the contour scanning of the prior art scans according to the direction parallel to the contour of the figure, and the equidistance line of the contour needs to be calculated. For each segment of equidistant line, a corresponding very cumbersome process is taken to remove the redundant ring formed by some equidistant lines, which makes the path planning and calculation of contour scanning complicated, so the implementation is more complicated, and the calculation of offset line in contour scanning is very complicated , the path generation process is complicated, and the efficiency of the method is not high. The objects processed by the triangulation scanning method and the scanning method based on mathematical morphology can only be polygons and not curve graphics. The time is long, the hardware overhead is large, and it is difficult to implement, and the processing methods for single-connected area objects and multi-connected area objects are different, and cannot be combined. The program structure of the equidistant line scanning method is complicated, and the method implementation efficiency is low;

[0010] Third, the key point in laser marking technology is the scanning method, which determines the path selection in the marking process and directly affects the marking speed, efficiency and final marking effect. The scanning method varies with the forming process. The existing technology The laser marking method is complicated to implement, the marking speed is slow, the time is long, the efficiency is low, the blank line distance is long, the calculation complexity is large, the scanning lines generated during the marking process are many, the number of jumps is large, and the total length of the jump is large , the number of optical switches is large, and the probability of device damage is also high. The existing technology lacks a good laser marking and scanning method that can operate effectively for a long time. The path during the marking process cannot shorten the auxiliary moving distance and time, which restricts marking. Efficiency, subjective quality and objective evaluation indicators are relatively poor, unable to meet the standards of efficient industrial applications

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