c++ - OpenCV 断言矩阵乘法失败

标签 c++ ios c opencv matrix-multiplication

我用 OpenCV 将两个矩阵相乘，A 为 NxM，B 为 MxP。

All the arrays must have the same type and the same size (or ROI size). For types that have limited range this operation is saturating.

然而，通过theory of matrix multiplication :

Assume two matrices are to be multiplied (the generalization to any number is discussed below). If A is an n×m matrix and B is an m×p matrix, the result would be AB of their multiplication is an n×p matrix defined only if the number of columns m in A is equal to the number of rows m in B.

这段代码不能正常工作吗？

- (CvMat *) multMatrix:(CvMat *)AMatrix BMatrix:(CvMat *)BMatrix 
{
  CvMat *result = cvCreateMat(AMatrix->rows, BMatrix->cols, kMatrixType);
  cvMul(AMatrix, BMatrix, result, 1.0);
  return result;
}

我得到以下异常:

OpenCV Error: Assertion failed (src1.size == dst.size && src1.channels() == dst.channels()) in cvMul, file /Users/Aziz/Documents/Projects/opencv_sources/trunk/modules/core/src/arithm.cpp, line 2728

kMatrixType 是 CV_32F，A 是 6x234，B 是 234x5，结果是 6x5...

我做错了什么吗？或者这是 OpenCV 对矩阵乘法的限制？

最佳答案

您正在使用 cvMul 进行逐元素乘法。

你应该看看 cvMatMul 来做正确的矩阵乘法。

http://opencv.willowgarage.com/wiki/Matrix_operations

关于c++ - OpenCV 断言矩阵乘法失败，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/16981207/