error in edge command

2011 4 7
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Hello,
When I run the following code I get this message: ??? [BW,threshold]=edge(img,’zerocross’,[],'Laplacian'); | Error: The input character is not valid in MATLAB statements or expressions.
Could someone help me?
Thanks in advance
%%%%%% code%%%%%% clc;close all;clear *;
Laplacian=[1 1 1; 1 -8 1; 1 1 1];
img=double(imread('C:\Users\manolis\Desktop\ask4 sagkriwths\clown.tif')); [BW,threshold]=edge(img,’zerocross’,[],'Laplacian'); figure;imshow(img,[]) figure;imshow(BW)
disp(threshold)

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Andrew Newell
Andrew Newell 2011-4-7
John, could you please format the code to make it readable? One command per line, indented two spaces (so the preview of the code looks grey).
john
john 2011-4-7
clc;
close all;
clear *;
Laplacian=[1 1 1; 1 -8 1; 1 1 1];
img=double(imread('C:\....\image.tif'));
[BW,threshold]=edge(img,’zerocross’,[],'Laplacian');
figure;imshow(img,[])
figure;
imshow(BW)
disp(threshold)
Andrew Newell
Andrew Newell 2011-4-7
That's better, but I meant replace your code in the question by the formatted code (click on "Edit").

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Andrew Newell
Andrew Newell 2011-4-7

0 个投票

You have the wrong kind of quotes around zerocross and should not have quotes around Laplacian. Try this:
[BW,threshold]=edge(img,'zerocross',[],Laplacian);

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