CNN：带着同一把尺子找横线CNN: Find a Line with One Shared Ruler

手算 1 × 3 模板的一个窗口，并区分特征图位置和全局最大值。Calculate one 1 × 3 window and distinguish feature-map locations from a global maximum.

先在纸上猜结果，再按按钮检验。Predict on paper before checking with the buttons.

这是手工模板的滑动点积（深度学习中通常实现为互相关），不是训练好的 CNN。无填充、步长 1；边界裁切、旋转、步长和后续层都会影响平移表现。This hand-set sliding dot product is cross-correlation as commonly used in deep learning, not a trained CNN. It uses no padding and stride one; boundaries, rotation, stride and later layers affect translation behavior.

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