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Hi,

I have been struggling with the reshape function. I have a big matrix that I convert into a 1 column mat. When I convert the I column back to the original size, the image has an offset and doesn't fit the original no more.

Here my code more or less (PS. I have simplified it to this that demonstrates my problem):

vb.net code

frame = my_Original_mat Dim SingleColumn As Mat = frame.Clone.Reshape(0, frame.Cols * frame.Rows) 'makes it a 1 column mat

Dim Mymat As New Mat

SingleColumn.Col(0).CopyTo(Mymat) 'get the single column back out again

Dim OriginalShape As Mat = Mymat.Reshape(0, frame.Rows))

CvInvoke.Imshow("Original ", frame.Clone)

CvInvoke.Imshow("OriginalShape ", OriginalShape .Clone)

Sorry for the bad images...but I think you can see that the reshaped one is now shifted down. What am I doing wrong? I need a way to simply extract 1 column at the time from a build up matrix (I concat into this matrix). Let me know if anything else is needed and thanks for the help in advance.

Hi,

I have been struggling with the reshape function. I have a big matrix that I convert into a 1 column mat. When I convert the I column back to the original size, the image has an offset and doesn't fit the original no more.

Here my code more or less (PS. I have simplified it to this that demonstrates my problem):

vb.net codecode:

frame = my_Original_mat 
Dim SingleColumn As Mat = frame.Clone.Reshape(0, frame.Cols * frame.Rows)  'makes it a 1 column mat
 
mat

Dim Mymat As New Mat
 
Mat

 SingleColumn.Col(0).CopyTo(Mymat)   'get the single column back out again
 
again

 Dim OriginalShape As Mat = Mymat.Reshape(0, frame.Rows))
 
frame.Rows))

CvInvoke.Imshow("Original ", frame.Clone)
 
frame.Clone)

CvInvoke.Imshow("OriginalShape ", OriginalShape .Clone)
 
 
.Clone)

![image description](/upfiles/1571063685618789.png)

![image description](/upfiles/15710637115395028.png)

Hi,

I have been struggling with the reshape function. I have a big matrix that I convert into a 1 column mat. When I convert the I column back to the original size, the image has an offset and doesn't fit the original no more.

Here my code more or less (PS. I have simplified it to this that demonstrates my problem):

vb.net code:

frame = my_Original_mat 
Dim SingleColumn As Mat = frame.Clone.Reshape(0, frame.Cols * frame.Rows)  'makes it a 1 column mat

Dim Mymat As New Mat

 SingleColumn.Col(0).CopyTo(Mymat)   'get the single column back out again

 Dim OriginalShape As Mat = Mymat.Reshape(0, frame.Rows))

CvInvoke.Imshow("Original ", frame.Clone)

CvInvoke.Imshow("OriginalShape ", OriginalShape .Clone)

![image description](/upfiles/1571063685618789.png)

![image description](/upfiles/15710637115395028.png)

Sorry for the bad images...but I think you can see that the reshaped one is now shifted down. What am I doing wrong? I need a way to simply extract 1 column at the time from a build up matrix (I concat into this matrix). Let me know if anything else is needed and thanks for the help in advance.