Index in position 1 exceeds array bounds

4 次查看（过去 30 天）

Teik Jin Lim 2019-11-4

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/489145-index-in-position-1-exceeds-array-bounds

编辑： Adam Danz 2019-11-5

Hi, I am running the Circular Hough Transform code (from Matlab) with different image inputted. However there is an error popping out mentioned that "Index in position 1 exceeds array bounds". I don know what is the reason behind it. Please help me on this !

A = imread('circle.png');
imshow(A);
[centers, radii, metric] = imfindcircles(A,[15 30]);
centersStrong5 = centers(1:5,:); 
radiiStrong5 = radii(1:5);
metricStrong5 = metric(1:5);
viscircles(centersStrong5, radiiStrong5,'EdgeColor','b');

2 个评论
显示无隐藏无

Adam Danz 2019-11-4

编辑：Adam Danz 2019-11-5

在 MATLAB Online 中打开

What line is causing the error?

Sharing the error message is helpful but you should share the entire copy-pasted error message and indicate which line is causing the error.

"Index in position 1 exceeds array bounds" is quite informative. It means you're asking for values that don't exist. Here's an example:

a = [1 2 3 4 5]
a(6)  % But there is only 5 values!  Error!

Teik Jin Lim 2019-11-5

编辑：Teik Jin Lim 2019-11-5

Hi,

I think I pasted the whole error that pop out on my command window. Only "Index in position 1 exceeds array bounds" is shown which put me in a confuse situation.

But in this error, which line is represented as position 1 ?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

David Hill 2019-11-4

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/489145-index-in-position-1-exceeds-array-bounds#answer_399782

在 MATLAB Online 中打开

If imfindcircles finds less than 5 circles you are going to error.

A = imread('circle.png');
imshow(A);
[centers, radii, metric] = imfindcircles(A,[15 30]);
a=max(5,length(centers));
centersStrong5 = centers(1:a,:); 
radiiStrong5 = radii(1:a);
metricStrong5 = metric(1:a);
viscircles(centersStrong5, radiiStrong5,'EdgeColor','b');

5 个评论
显示 3更早的评论隐藏 3更早的评论

Walter Roberson 2019-11-5

I keep getting caught myself in thinking that the operation "at least so-many" should be a min() operation, because you want a minimum of so-many.

Teik Jin Lim 2019-11-5

Yea. You solve that issue for me.

But sadly, when I try it with other image it doens't seems like working even though there is no error. I changed the sensitivy and radius, but the output is the same. No circle detected.

请先登录，再进行评论。