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Design a simplified version of Twitter where users can post tweets, follow/unfollow another user and is able to see the 10 most recent tweets in the u 阅读全文
posted @ 2018-02-09 02:57
jxr041100
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SIFT特征检测主要包括以下4个基本步骤：[1] 尺度空间极值检测： 搜索所有尺度上的图像位置。通过高斯微分函数来识别潜在的对于尺度和旋转不变的兴趣点。 2. 关键点定位 在每个候选的位置上，通过一个拟合精细的模型来确定位置和尺度。关键点的选择依据于它们的稳定程度。 3. 方向确定 基于图像局部的梯 阅读全文
posted @ 2018-02-09 02:56
jxr041100
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Histogram of Oriented Gradients (HOG) Descriptor Histogram of oriented gradients (HOG) is a feature descriptor used to detect objects in computer visi 阅读全文
posted @ 2018-02-09 01:51
jxr041100
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The most common algorithm uses an iterative refinement technique. Due to its ubiquity it is often called the k-means algorithm; it is also referred to 阅读全文
posted @ 2018-02-09 01:34
jxr041100
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A binary watch has 4 LEDs on the top which represent the hours (0-11), and the 6 LEDs on the bottom represent the minutes (0-59). Each LED represents 阅读全文
posted @ 2018-02-09 01:06
jxr041100
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Find the sum of all left leaves in a given binary tree. Example: 阅读全文
posted @ 2018-02-09 01:02
jxr041100
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A group of friends went on holiday and sometimes lent each other money. For example, Alice paid for Bill's lunch for 10.ThenlaterChrisgaveAlice10.Then 阅读全文
posted @ 2018-02-09 00:49
jxr041100
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