Hi, I have a matrix 1664 × 128. How to design a filter, the output of the filter is 832×128. That is, it should have first half of 1664(i.e. 832) and should remove other part. I know that I can use: (1:832,:). But I want to design a filter for it.

Hi, I have a matrix 1664 × 128. How to design a filter, the output of the filter is 832×128. That is, it should have first half of 1664(i.e. 832) and should remove other part. I know that I can use: (1:832,:). But I want to design a filter for it.

Answer 1

[Image Analyst]

Not sure what you want. Do you want a filter that returns the matrix unaffected on the top half and the bottom half is all zeros, or cropped off entirely? Or something else?

To zero:

function filteredM = MyFilter(M)
  filteredM = M; % Initialize
  filteredM(833:end, :) = 0

To crop

function filteredM = MyFilter(M)
  filteredM = M(1:832, :);

If that's not what you mean, then explain better.

[Sai Prakash Reddy Konda]

Thank you so much

[Sai Prakash Reddy Konda]

Thank you so much

Answer 2

[Walter Roberson]

Filters always return an output the same size as the input, so this is not something that can be done as a true filter.

It can be done as an anonymous function

F = @(M) M(1:floor(end/2),:);

In the case of a matrix with an odd number of rows this does not copy the center row. If you want the center row copied then use ceil instead of floor

[Sai Prakash Reddy Konda]

Thank you so much