中国激光, 2019, 46 (2): 0202001, 网络出版: 2019-05-09
飞秒激光等离子体光斑图像增强及亮度分析 
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Image Enhancement and Luminance Analysis of Femtosecond Laser Induced Plasma Spot
图 & 表
图 1. 飞秒激光加工平台及烧蚀的光斑图像。(a)加工平台;(b)带状烧蚀痕迹;(c)等离子体光斑图像
Fig. 1. Femtosecond laser processing platform and ablated spot image. (a) Processing platform; (b) strip ablation trace; (c) plasma spot image
图 2. 增强效果对比。(a)原图;(b)灰度图;(c) PCA增强图;(d)直方图均衡化
Fig. 2. Enhancement effect comparison. (a) Original image; (b) grayscale image; (c) PCA enhancement image; (d) histogram equalization
图 3. 不同滤波方法得到的灰度图伪彩色增强效果
Fig. 3. Grayscale pseudo-color enhancement effects obtained by different filtering methods
图 4. 核心烧蚀区分割。(a)分割结果;(b)掩模
Fig. 4. Core ablation zone segmentation. (a) Segmentation result; (b) mask
图 5. 不同加工方向的等离子体光斑伪彩色图。(a)向下;(b)向上;(c)转向
Fig. 5. Pseudo-color maps of plasma spot along different processing directions. (a) Downward; (b) upward; (c) steering
图 7. 加工方向判断流程实例。(a)向下加工判断步骤;(b)向上加工判断步骤;(c)转向加工判断步骤
Fig. 7. Examples of flow chart for judging machining direction. (a) Steps for judging downward processing; (b) steps for judging upward processing; (c) steps for judging steering processing
图 8. 基于Niblack分割掩模的亮度特征。(a)伪彩色;(b)分割;(c)分割效果;(d)掩模
Fig. 8. Luminance characteristics based on Niblack segmentation mask. (a) Pseudo color; (b) segmentation; (c) segmentation effect; (d) mask
图 9. 样本A的亮度特征曲线和方向标号。(a)总亮度;(b)平均亮度;(c)方向标签
Fig. 9. Brightness characteristic and direction label of sample A. (a) Total brightness; (b) average brightness; (c) direction label
王福斌, 刘洋, 潘兴辰, 王宜文. 飞秒激光等离子体光斑图像增强及亮度分析[J]. 中国激光, 2019, 46(2): 0202001. Fubin Wang, Yang Liu, Xingchen Pan, Yiwen Wang. Image Enhancement and Luminance Analysis of Femtosecond Laser Induced Plasma Spot[J]. Chinese Journal of Lasers, 2019, 46(2): 0202001.
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