How to labels each cell in image? i upload the input images and the output masks which i wants from the input image.

[Arshad Ali]

[Arshad Ali]

[Arshad Ali]

[Arshad Ali]

[Arshad Ali]

[Arshad Ali]

clc;
clear all;
close all;
A = imread('1(491).png');
figure,imshow(A);
title('original image');
B = im2bw(A);
figure,imshow(B);
C = imfill(B,'holes');
figure,imshow(C);
label = bwlabel(C);
max(max(label))
im1 = (label==1);
figure,imshow(im1);
figure,imshow(label==6);
for j=1:max(max(label))
    [row, col] = find(label==j);
    len=max(row)-min(row)+2;
    breadth=max(col)-min(col)+2;
    target=unit8(zeros([len breadth]));
    sy=min(col)-1;
    sx=min(row)-1;
    for i=1:size(row,1)
      x=row(1,1)-sx;
      y=col(1,1)-sy;
      target(x,y)=A(row(1,1),col(1,1));
    end
    mytitle=strcat('object number:',num2str(j));
    figure,imshow(target);title(mytitle);
end

I tried this code but it's not working.

[Arshad Ali]

can any one help me with the code. whats wrong with this code?

[Image Analyst]

There is no function unit8. You probably meant uint8().

Answer 1

[Image Analyst]

Try this code to label the regions and loop through and show you the regions one at a time:

clc;    % Clear the command window.
close all;  % Close all figures (except those of imtool.)
clear;  % Erase all existing variables. Or clearvars if you want.
workspace;  % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 18;

binaryImage = imread('index.png');
subplot(2, 2, 1);
imshow(binaryImage); % Saved image is already logical/binary.
axis('on', 'image');
title('Original Binary Image', 'FontSize', fontSize);

filledImage = imfill(binaryImage,'holes');
subplot(2, 2, 2);
imshow(filledImage);
axis('on', 'image');
title('Filled Binary Image', 'FontSize', fontSize);

subplot(2, 2, 3);
[labeledImage, numberOfRegions] = bwlabel(filledImage);
% Let's assign each blob a different color to visually show the user the distinct blobs.
coloredLabels = label2rgb (labeledImage, 'hsv', 'k', 'shuffle'); % pseudo random color labels
imshow(coloredLabels);
axis('on', 'image');
caption = sprintf('Labeled Image has %d Regions', numberOfRegions);
title(caption, 'FontSize', fontSize);
% Enlarge figure to full screen.
set(gcf, 'Units', 'Normalized', 'OuterPosition', [0, 0.04, 1, 0.96]);

% Make measurements
props = regionprops(labeledImage, 'Image', 'BoundingBox');
% Loop over all blobs, showing them one at a time.
subplot(2, 2, 4);
for k = 1 : numberOfRegions
	thisBlob = props(k).Image;
	imshow(thisBlob);
	axis('on', 'image');
	[rows, columns] = size(thisBlob);
	caption = sprintf('Region #%d is %d rows by %d columns', k, rows, columns);
	title(caption, 'FontSize', fontSize);
	promptMessage = sprintf('Do you want to Continue,\nor Quit?');
	titleBarCaption = 'Continue?';
	buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
	if contains(buttonText, 'Quit')
		break;
	end
end

[Arshad Ali]

i want to detect each label and then save each label separately like the mask which i upload above.

[Image Analyst]

OK (I don't see a question there). So did you use save() or imwrite()? If you used save(), you might have done it like this:

for k = 1 : numberOfRegions
	individualBlobMasks{k} = ismember(labeledImage, k);
	thisBlob = props(k).Image;
	imshow(thisBlob);
	axis('on', 'image');
	[rows, columns] = size(thisBlob);
	caption = sprintf('Region #%d is %d rows by %d columns', k, rows, columns);
	title(caption, 'FontSize', fontSize);
	promptMessage = sprintf('Do you want to Continue,\nor Quit?');
	titleBarCaption = 'Continue?';
	buttonText = questdlg(promptMessage, titleBarCaption, 'Continue', 'Quit', 'Continue');
	if contains(buttonText, 'Quit')
		break;
	end
end
save('individualBlobMasks.mat', 'individualBlobMasks');

[Arshad Ali]

hello Sir. how can i save the individual label in .png. i try it but its not working. thank you

[Image Analyst]

There is a function called imwrite() that you should learn of.

If you want images where there is just one blob per image, save thisBlob in the loop with imwrite() and a unique filename

filename = sprintf('Blob %d.png', k);
imwrite(thisBlob, filename);

[Arshad Ali]

thanks alot