Is there any possible to save the logical image in png?

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Dayangku Nur Faizah Pengiran Mohamad 2023-11-20

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https://ww2.mathworks.cn/matlabcentral/answers/2049847-is-there-any-possible-to-save-the-logical-image-in-png

回答： Dyuman Joshi 2023-11-21

采纳的回答： Dyuman Joshi

I want to save my image logical as .png. But I got uint8 datatype after save it.

Is it possible to save an image in logical format png?

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Dayangku Nur Faizah Pengiran Mohamad 2023-11-21

编辑：Dayangku Nur Faizah Pengiran Mohamad 2023-11-21

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Hi thanks for your respon Sir.

I still don't get it. How do save the image logical? Here's my codes:

fontSize = 16;
I=imread('rescale8.jpg');
subplot(1, 2, 1);
imshow(I, []);
axis('on', 'image');
%caption = sprintf('Original Image : "%s"', I);
drawnow;
hp = impixelinfo();
hFig1 = gcf;
hFig1.Units = 'Normalized';
hFig1.WindowState = 'maximized';
hFig1.Name = 'Demo by Image Analyst';
% Mask to find the lesion.
hsvImage = rgb2hsv(I);
mask = hsvImage(:,:,2) > 0.3;
% Fill holes.
mask = imfill(mask, 'holes');
% Display the test image full size.
subplot(1, 2, 2);
imshow(mask, []);
axis('on', 'image');
%caption = sprintf('Mask Image : "%s"', I);
%title(caption, 'FontSize', fontSize, 'Interpreter', 'None');
drawnow;
hp = impixelinfo();
subplot(1, 2, 1);
% Here is where we actually get the boundaries for each blob.
boundaries = bwboundaries(mask);
% boundaries is a cell array - one cell for each blob.
% In each cell is an N-by-2 list of coordinates in a (row, column) format.  Note: NOT (x,y).
% Column 1 is rows, or y.    Column 2 is columns, or x.
numberOfBoundaries = size(boundaries, 1); % Count the boundaries so we can use it in our for loop
% Here is where we actually plot the boundaries of each blob in the overlay.
hold on; % Don't let boundaries blow away the displayed image.
for k = 1 : numberOfBoundaries
	thisBoundary = boundaries{k}; % Get boundary for this specific blob.
	x = thisBoundary(:,2); % Column 2 is the columns, which is x.
	y = thisBoundary(:,1); % Column 1 is the rows, which is x.
	plot(x, y, 'g-', 'LineWidth', 1); % Plot boundary in red.
    imwrite(logical(mask),'maskre8.jpg');
end