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find-light-circle's Introduction

  • step0: 二值化
  • step1: 连通块染色 < bfs
  • step2: 求黑色区域出发到每个有色像素点的距离 < bfs（其实只要求边缘）这一步有点多余。黑色区域距离为 $0$
  • step3: 以有色质心作为圆心
  • step4: 外接半径是同色距离为 1 的像素点到圆心的平均距离
  • step5: 对每个圆，求其和所属染色块的 iou，排除相对于 $\mathop{\text{最}}\limits_{\text{所有圆}} \text{佳} \text{iou}$ 太小的圆，再取面积最大的。

Run test cmd line

gcc light_recognition.c -o 1 && ./1 light2.ppm > 1.ppm && open 1.ppm

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