black task processing in an image

1 次查看（过去 30 天）

显示更早的评论

dakhli mohamed 2019-3-7

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448799-black-task-processing-in-an-image

评论： Image Analyst 2019-3-8

采纳的回答： Image Analyst

outputt.mat

Hello

I have a problem with the image display level, the problem is that I have black spots in the white part and I want to eliminate them

attaching the resulting image and the .mat file

thank you in advance

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst 2019-3-7

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/448799-black-task-processing-in-an-image#answer_364270

在 MATLAB Online 中打开

Threshold the image and then call imfill()

binaryImage = grayImage > someValue;
binaryImage = imfill(binaryImage, 'holes');

If you want only holes of a certain diameter filled, then it's a little trickier, so write back.

5 个评论
显示 3更早的评论隐藏 3更早的评论

dakhli mohamed 2019-3-7

here is the image obtained after the execution of your code

Image Analyst 2019-3-8

在 MATLAB Online 中打开

Then try this, if you want all black holes filled to white:

s = load('outputt.mat')
u = logical(s.u);
subplot(2, 1, 1);
imshow(u, 'InitialMagnification', 200);
axis('on', 'image');
% Fill in everything.
[rows, columns] = find(u);
boundaryIndexes = boundary(columns, rows);
hold on;
plot(columns(boundaryIndexes), rows(boundaryIndexes), 'r-', 'LineWidth', 2);
newImage = poly2mask(columns(boundaryIndexes), rows(boundaryIndexes), size(u, 1), size(u, 2));
subplot(2, 1, 2);
imshow(newImage, 'InitialMagnification', 200);
axis('on', 'image');