imbinarize(I) returning "Error using > , Matrix dimensions must agree."

9 次查看（过去 30 天）
Jacquie
Jacquie 2022-2-18
回答： Jacquie 2022-2-18
Hi, I'm having trouble thresholding my grayscale images and my errors don't match any issues I've seen online. I ran into this issue originally with my own grayscale jpegs, but I'm replicating the issue here with the image "George" from this post so that others can run my code if needed.
imbinarize(I) is throwing an error, but imbinarize(I, T) is not:
>> url = 'https://blogs.mathworks.com/images/steve/36/george.jpg';
>> I = imread(url);
>> imshow(I)
>> T = 0.5;
>> bw = imbinarize(I, T);
>> imshow(bw)
>> bw = imbinarize(I);
Error using >
Matrix dimensions must agree.
Error in imbinarize>binarize (line 162)
BW = I > T*classrange(2);
Error in imbinarize (line 152)
BW = binarize(I,T);
Additionally, I tried using graythresh() to determine the threshold, but for some reason it gives me a logical array:
>> T = graythresh(I);
>> whos T
Name Size Bytes Class Attributes
T 256x1 256 logical
Interestingly, multithresh does work:
>> T = multithresh(I)
T =
uint8
112
I recently updated Matlab to ensure that this wasn't a compatibility issue or something, and it's still happening. I'm sure I can use multithresh() to make this if needed, but I'd really like to do this right and to make sure I'm not missing something in my image processing.
Thank you!
  1 个评论
Voss
Voss 2022-2-18
Ran in:
I don't run into the error here:
url = 'https://blogs.mathworks.com/images/steve/36/george.jpg';
I = imread(url);
imshow(I)
T = 0.5;
bw = imbinarize(I, T);
imshow(bw)
bw = imbinarize(I);
imshow(bw)

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Jacquie
Jacquie 2022-2-18
Update: issue fixed in R2021b
I had been using R2018b, so I tried downloading R2021b and the issue is resolved. I still don't know why I ran into that error, but I'll be working in the new install now.
Thanks!

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Logical 的更多信息

标签

产品


版本

R2018b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by