The zip file includes:
- readme.txt ---> this file
- conv2olam.m ---> the M-file which contains the m-function to perform
Overlap-add method of CONV2 using FFT2
CONV2OLAM Overlap-add method of CONV2 using FFT2.
Y = CONV2OLAM(A,B) performs the 2-D convolution of matrices
A and B using the overlap/add method and using internal parameters (FFT2
size and block length) which guarantee efficient execution.
If [ma,na] = size(A) and [mb,nb] = size(B), then size(Y) = [ma+mb-1,na+nb-1].
Y = CONV2OLAM(A,B,mode,siz1,siz2) allows you to have some control over the
internal parameters by using a zero padding. If mode is equal to:
- 0 is the default value, if not specified. This value for
mode uses overlap/add method. Ex. conv2olam(a,b,0) is equivalent
to perform conv2olam(a,b).
- 1 the dimensions of input matrices are zero padded to their nextpow2
values (type 'help nextpow2' on Matlab prompt) to perform
FFT2 and IFFT2. No overlap is performed. Ex. conv2olam(a,b,1)
- 2 the dimensions of input matrices are not zero padded to perform
these FFT-based operations. No overlap is performed. Ex. conv2olam(a,b,2)
- 3 the dimensions of matrices are zero padded to fixed values
which must be specified to perform overlapping.
Ex. conv2olam(a,b,3,512,512) uses 512 X 512 matrices
to perform overlap/add method.
See also CONV2, FILTFILT, FFT2, IFFT2.
Please contribute if you find this software useful.
Report bugs to luigi.rosa@tiscali.it
*****************************************************************
Luigi Rosa
Via Centrale 27
67042 Civita di Bagno
L'Aquila --- ITALY
email luigi.rosa@tiscali.it
mobile +39 340 3463208
http://utenti.lycos.it/matlab
*****************************************************************
