我正在尝试使用Intel MKL
计算3D阵列的3D卷积。有人可以给我一些提示我该怎么做吗?使用MKL
是否可以实现?提前致谢。
最佳答案
英特尔具有3a FFT的an example on their page,这对于通过在频率空间中进行乘法进行卷积很有帮助。抱歉,我没有完整的解决方案:
三维REAL FFT(C接口)
#include "mkl_dfti.h"
float x[32][100][19];
float _Complex y[32][100][10]; /* 10 = 19/2 + 1 */
DFTI_DESCRIPTOR_HANDLE my_desc_handle;
MKL_LONG status, l[3];
MKL_LONG strides_out[4];
//...put input data into x[j][k][s] 0<=j<=31, 0<=k<=99, 0<=s<=18
l[0] = 32; l[1] = 100; l[2] = 19;
strides_out[0] = 0; strides_out[1] = 1000;
strides_out[2] = 10; strides_out[3] = 1;
status = DftiCreateDescriptor( &my_desc_handle, DFTI_SINGLE,
DFTI_REAL, 3, l );
status = DftiSetValue(my_desc_handle,
DFTI_CONJUGATE_EVEN_STORAGE, DFTI_COMPLEX_COMPLEX);
status = DftiSetValue( my_desc_handle, DFTI_PLACEMENT, DFTI_NOT_INPLACE );
status = DftiSetValue(my_desc_handle,
DFTI_OUTPUT_STRIDES, strides_out);
status = DftiCommitDescriptor(my_desc_handle);
status = DftiComputeForward(my_desc_handle, x, y);
status = DftiFreeDescriptor(&my_desc_handle);
/* result is the complex value z(j,k,s) 0<=j<=31; 0<=k<=99, 0<=s<=9
and is stored in complex matrix y in CCE format. */
下一步将对填充的内核执行相同的转换,两个复数数组的逐点乘法以及逆FFT。
关于c - 使用Intel MKL的3D卷积,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/27053244/