How do I save a series of Output images in a folder (that is inside a for loop)?

imshow(img)

hold on

plot([xLeftY, xRightY], [yLeftY, yRightY], 'LineWidth',5,'Color','Yellow');

plot([xLeftW, xRightW], [yLeftW, yRightW], 'LineWidth',5,'Color','White');

hold off

The above code shows a series of images that is inside a for loop and plots lines on the image

I need to save the output images (251 images)

Answer 1

[Image Analyst]

Use sprintf() to create a filename, like

folder = 'C:/Jasons images'; % Whatever...
for loopCounter = 1 : whatever...
    filename = fullfile(folder, sprintf('Image %2.2d', loopCounter));
    % Plot to an axes...  Then save to a disk file with exportgraphics():
    exportgraphics(gca, filename);
end

Answer 2

[M.B]

Have a look at export_fig:

https://au.mathworks.com/matlabcentral/fileexchange/23629-export_fig?s_tid=srchtitle

Answer 3

[yanqi liu]

for i = 1:251
    imshow(img)
    hold on
    plot([xLeftY, xRightY], [yLeftY, yRightY], 'LineWidth',5,'Color','Yellow');
    plot([xLeftW, xRightW], [yLeftW, yRightW], 'LineWidth',5,'Color','White');
    hold off
    % get figure snap and save to png file
    f = getframe(gcf);
    f = frame2im(f);
    if ~exist('./fd', 'dir')
        mkdir('./fd');
    end
    imwrite(f, sprintf('./fd/%03d.png', i));
end