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# ftrans2() - Image Processing

### Syntax

### Example

### Output / Return Value

### Limitations

### Alternatives / See Also

### Reference

h = ftrans2(b, t) produces the two-dimensional FIR filter h that corresponds to the one-dimensional FIR filter b using the transform t. (ftrans2 returns h as a computational molecule, which is the appropriate form to use with filter2.) b must be a one-dimensional, Type I (even symmetric, odd-length) filter such as can be returned by fir1, fir2, or remez in the Signal Processing Toolbox software. The transform matrix t contains coefficients that define the frequency transformation to use. If t is m-by-n and b has length Q, then h is size ((m-1)*(Q-1)/2+1)-by-((n-1)*(Q-1)/2+1).h = ftrans2(b) uses the McClellan transform matrix t.t = [1 2 1; 2 -4 2; 1 2 1]/8;All inputs and outputs should be of class double.

h = ftrans2(b, t)h = ftrans2(b)

t = [1 2 1; 2 -4 2; 1 2 1]/8;