您正在关注此问题

您将在关注的内容源中看到更新。
您可能会收到电子邮件，具体取决于您的通信预设项。

problem with strel function

8 次查看（过去 30 天）

显示更早的评论

fatemeh n 2020-10-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function

⋮

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function

评论： Walter Roberson 2020-10-9

在 MATLAB Online 中打开

I want to apply 'disk' structure on my balck and white image, however it rises an error as followe:

Undefined function or variable 'MakeDiskStrel'.

Error in main (line 25)

se =MakeDiskStrel();

my code:

I = imread('img.jpg');
gray = rgb2gray(I);
bw1 = imbinarize(gray);
bw2 = imfill(bw1,'holes');
se = strel('disk',10);
cl=imclose(bw2,se);
imshow(cl)

I am using MATLAB R2018b

12 个评论
显示 10更早的评论隐藏 10更早的评论

Jon 2020-10-6

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040056

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040056

在 MATLAB Online 中打开

I don't see the line of code

se =MakeDiskStrel()

in the listing that you provided.

Without seeing the part of the code that is throwing the error it is difficult to give further guidance

fatemeh n 2020-10-6

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040481

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040481

在 MATLAB Online 中打开

I havn't written such a line as

se =MakeDiskStrel()

It raise this error with above codes only.

I have attached the screenshot of the erro.

Jon 2020-10-6

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040581

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040581

I'm sorry, I don't currently have an active license for the image processing toolbox, so I guess you will have to find someone who does to help you further

Walter Roberson 2020-10-6

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040681

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1040681

MakeDiskStrel is a function defined at line 1028 of strel.m

fatemeh n 2020-10-7

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1043196

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1043196

I tried changing the radius and it is working with 1 and 2 but not any larger number, can anyone explain why it is the case?

this is part of a tiny project for university and in the project description, it is specifically mentioned to set the radius to 10. Any suggestion what should I do? radius 10 raise error.

Walter Roberson 2020-10-7

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1043471

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1043471

If you edit strel then what do you see at line 1028?

fatemeh n 2020-10-8

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046211

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046211

I never changed anything in strel built-in function codes. So everything is the same. hope I understood your question well?

Walter Roberson 2020-10-8

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046335

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046335

Could you confirm that the same strel that you are executing that is complaining about MakeDiskStrel not existing, does in fact define a function MakeDiskStrel at line 1028?

If so then about the only way you could get that happening is if strel.m is corrupted at some point after the line that calls MakeDiskStrel so that MATLAB is unable to parse the rest of the file properly. If that is the case then if you edit strel you would very likely see a big red error mark at the point where MATLAB gives up parsing.

Jon 2020-10-8

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046351

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046351

在 MATLAB Online 中打开

I noticed that in the OP original post the error message is listed as

Undefined function or variable 'MakeDiskStrel'.

Error in main (line 25)

se =MakeDiskStrel();

Note that in the last line of the error message, there is no space between the equal sign and the function MakeDiskStrel();

Usually all of the official MATLAB code would have a space there, e.g.

se = MakeDiskStrel()

This makes me wonder if someone has been editing the original MATLAB source and perhaps breaking something in the process

Walter Roberson 2020-10-8

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046383

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1046383

在 MATLAB Online 中打开

Interesting point, Jon. Indeed, the original code, line 211 in R2018b, is

se = MakeDiskStrel(params{:});

Notice that a parameter has been passed, but the code with the error message, no parameter was passed.

Therefore the user is not using the Mathworks strel.m

I wonder what the output is of

which -all strel

fatemeh n 2020-10-9

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1048381

⋮

链接

此评论的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/606341-problem-with-strel-function#comment_1048381

I went through strel.m hopefully the space was there. However, I am considering reinstalling the software maybe something else is broken here. Thanks for your time.