 | 1 | initial version |
I have an array in memory that represents a matrix. However, I have a stride value for both rows and individual elements. That is, the step from one element in a row to the next is NOT the size associated with its type (e.g. 8 for doubles).
Is there any way to construct a cv::Mat object that maps to this chunk of memory?
P.S. The constructor of cv::Mat with step-size does not seem to do the trick, since I cannot specify the step size between elements in a row.
| | 2 | retagged |
I have an array in memory that represents a matrix. However, I have a stride value for both rows and individual elements. That is, the step from one element in a row to the next is NOT the size associated with its type (e.g. 8 for doubles).
Is there any way to construct a cv::Mat object that maps to this chunk of memory?
P.S. The constructor of cv::Mat with step-size does not seem to do the trick, since I cannot specify the step size between elements in a row.
| | 3 | No.3 Revision |
I have an array in memory that represents a matrix. However, I have a stride value for both rows and individual elements. That is, the step from one element in a row to the next is NOT the size associated with its type (e.g. 8 for doubles).
Is there any way to construct a cv::Mat object that maps to this chunk of memory?
P.S. The constructor of cv::Mat with step-size does not seem to do the trick, since I cannot specify the step size between elements in a row.
| | 4 | No.4 Revision |
I have an array in memory that represents a matrix. However, I have a stride value for both rows and individual elements. That is, the step from one element in a row to the next is NOT the size associated with its type (e.g. 8 for doubles).
Is there any way to construct a cv::Mat object that maps to this chunk of memory?
P.S. The constructor of cv::Mat with step-size does not seem to do the trick, since I cannot specify the step size between elements in a row.
Let's say I have an LxMxN array. It is organized in L-N-M storage order. The following example demonstrates the data layout of a 3x2x2 array in i:(n,m,l) format where i is the actual index in the memory chunk and (n,m,l) is the corresponding index in the 3D array:
0:(0,0,0) 1:(1,0,0) 2:(2,0,0),
3:(0,1,0) 4:(1,1,0) 5:(2,1,0),
6:(0,0,1) 7:(1,0,1) 8:(2,0,1),
9:(0,1,1) 10:(1,1,1) 11:(2,1,1)
Given such a chunk in memory representing the array A, I would like to construct a cv::Mat object representing, in MATLAB notation, the array A(i,:,:) for a given i.
| | 5 | No.5 Revision |
I have an array in memory that represents a matrix. However, I have a stride value for both rows and individual elements. That is, the step from one element in a row to the next is NOT the size associated with its type (e.g. 8 for doubles).
Is there any way to construct a cv::Mat object that maps to this chunk of memory?
P.S. The constructor of cv::Mat with step-size does not seem to do the trick, since I cannot specify the step size between elements in a row.
Let's say I have an 3D LxMxN array. It stored in a consecutive chunk of memory representing a 1D array of L*M*N entries. The data is organized in L-N-M storage order. The following example demonstrates the data layout of a 3x2x2 array in i:(n,m,l) format where i is the actual index in the memory chunk and (n,m,l) is the corresponding index in the 3D array:
0:(0,0,0) 1:(1,0,0) 2:(2,0,0),
3:(0,1,0) 4:(1,1,0) 5:(2,1,0),
6:(0,0,1) 7:(1,0,1) 8:(2,0,1),
9:(0,1,1) 10:(1,1,1) 11:(2,1,1)
Given such a chunk in memory representing the 3D array A and a number i, I would like to construct a cv::Mat object representing, in MATLAB notation, the array representing a 2D array A(i,:,:) for a given iB such that B(m,n) maps to the same memory cell as A(i,m,n).