How can i define MinSize, i am getting an error?

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Misrak Seifu 2014-6-16

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评论： dpb 2014-6-16

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When i try to pass a MinSize i am getting an error like i=this one below..How can i fix it?

Undefined function 'MinSize' for input arguments of type 'struct'.

Thank you

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Geoff Hayes 2014-6-16

在 MATLAB Online 中打开

Based on the error message, it seems that you are trying to use something called MinSize as a function and are passing a struct to it. The following code generates the same error

 x.a = 42;
 MinSize(x);

Given that there is no MinSize function, then this error message makes sense. Is this similar to what you are attempting?

Misrak Seifu 2014-6-16

Demo.m

Not really i just attached my m file..the error is on line 39

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dpb 2014-6-16

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...
I= dir([image_path,'*.jpg']);
[h w]=MinSize(I);
...

Of course you got the error-- I is the directory structure returned by dir, you've not loaded an image.

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dpb 2014-6-16

编辑：dpb 2014-6-16

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Which is what I expected. You didn't download all the supporting routines to go with the top level function. Go back to wherever/whomever you got the code and get the other supporting functions to go with what you do have.

Or, on second look at the code you posted -- what have you modified in that? It looks based on the indention that perhaps you've added the lines

faceDetector = vision.CascadeObjectDetector;
%faceDetector = vision.CascadeObjectDetector('MinSize',[20 20]);
I= dir([image_path,'*.jpg']);
[h w]=MinSize(I);
...

??? It doesn't look like that belongs where it is--there's an earlier dir then a loop processing the return from it and then this new call to dir inside there that kinda' wipes out everything else.

Was there even any reference to this MinSize function at all or did you just insert it hoping magic would happen?

If you expect it to "return the height and width of the smallest and largest object i want it to detect", you're going to have to somehow define that--it's not going to be able to pluck those from the aether by clairvoyance.

Misrak Seifu 2014-6-16