155. Min Stack
Easy
Description
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.
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Faster RCNN
Faster RCNN 是 Fast RCNN 的优化版本,二者主要的不同在于感兴趣区域的生成方法,Fast RCNN 使用的是选择性搜索,而 Faster RCNN 用的是 Region Proposal网络(RPN)。RPN 将图像特征映射作为输入,生成一系列 object proposals,每个都带有相应的分数。
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752. Open the Lock
You have a lock in front of you with 4 circular wheels. Each wheel has 10 slots: ‘0’, ‘1’, ‘2’, ‘3’, ‘4’, ‘5’, ‘6’, ‘7’, ‘8’, ‘9’. The wheels can rotate freely and wrap around: for example we can turn ‘9’ to be ‘0’, or ‘0’ to be ‘9’. Each...
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Distance Estimation
这个项目目的是用单目相机来做测距,从原理上讲,单目相机是没有办法进行测距的,因为构建的相机模型是一个射线方程,缺少自由度,没有办法唯一确定 $Z_c$ 的信息。
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743. Network Delay Time
There are N network nodes, labelled 1 to N.
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