矩阵点乘,矩阵乘法,卷积

矩阵的点积

就是矩阵各个对应元素相乘, 这个时候要求两个矩阵必须同样大小

矩阵的乘法
就是矩阵a的第一行乘以矩阵b的第一列,各个元素对应相乘然后求和作为第一元素的值。
矩阵只有当左边矩阵的列数等于右边矩阵的行数时,它们才可以相乘,乘积矩阵的行数等于左边矩阵的行数,乘积矩阵的列数等于右边矩阵的列数
卷积
把模板(n*n)放在矩阵上(中心对准要处理的元素),用模板的每个元素去乘矩阵中的的元素,累加和等于这个元素。步骤很简单:
1.求卷积矩阵的元素x,y时,对准h矩阵的x,y元素。
2.然后 f 矩阵从1,1朝右朝下移动,h从x,y朝左朝上移动。
3.对应元素相乘、相加即可。
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