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is paddedsize the matlab command?

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Halil arifoglu
Halil arifoglu 2012-7-20
编辑： Walter Roberson 2016-11-16
Dear Sir, is "paddedsize" a matlab command. If The answer is okey, What is the command used for?
  1 个评论
Halil arifoglu
Halil arifoglu 2013-9-21
Dear Sajid Khan, I have not send the question to you about the answer.
sincerely Prof.Dr.Uğıur Arifoglu

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Sajid Khan
Sajid Khan 2013-9-21
编辑：Walter Roberson 2016-11-16
isn't a matlab command, it's a function which was propsed by gonzalez in his book "Image Processing using Matlab", the source code of it is given below
function PQ = paddedsize(AB, CD, PARAM)
%PADDEDSIZE Computes padded sizes useful for FFT-based filtering.
% PQ = PADDEDSIZE(AB), where AB is a two-element size vector, computes the
% two-element size vecter PQ = 2*AB.
%
% PQ = PADDEDSIZE(AB, 'PWR2') computes the vector PQ such that PQ(1) =
% PQ(2) = 2^nextpow2(2*m), where m is MAX(AB).
%
% PQ = PADDEDSIZE(AB, CD), where AB and CD are two-element size vectors,
% computes the two-element size vector PQ. The elements of PQ are the
% smallest even integers greater than or equal to AB + CD -1.
%
% PQ = PADDEDSIZE(AB, CD, 'PWR2') computes the vector PQ such that PQ(1) =
% PQ(2) = 2^nextpow2(2*m), where m is MAX([AB CD]).
%
% Function rewritten from Gonzalez, Woods, Eddins; Digital Image Processing using Matlab
% Prentice Hall, 2004
if nargin ==1
PQ = 2*AB;
elseif nargin == 2 & ~ischar(CD)
PQ = AB +CD -1;
PQ = 2*ceil(PQ/2);
elseif nargin ==2
m= max(AB); %Maximum dimension
%Find power-of-2 at least twice m.
P = 2^nextpow2(2*m);
PQ = [P, P];
elseif nargin == 3
m=max([AB CD]); % Maximum dimension.
P = 2^nextpow2(2*m);
PQ = [P, P];
else
error('Wrong number of inputs')
end

更多回答（2 个）

Jan
Jan 2012-7-20
编辑：Jan 2012-7-20
You can simply try it:
help paddedsize
doc paddedsize
which paddedsize -all % [EDITED, thanks Daniel]
If Matlab tells, that the command cannot be found, it is not available.
If the function is published in the FileExchange, searching there would help. Otherwise asking your favorite search engine for "Matlab paddedsize" is promissing.
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Jan
Jan 2012-7-20
lookfor searchs the H1-lines. While Matlab's built-in commands repeate the name of a function in the H1-line, I do not think that this is really useful. docsearch has much more power. And especially the submissions in the FEX support H1-lines partially only.

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Walter Roberson
Walter Roberson 2012-7-20
No, paddedsize() is not a MATLAB command. It could be the name of a third-party routine.

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