How to select rectangle ROI in the image and adjust the position of ROI manually. Then it can return the adjusted ROI position

I can generate roi using images.roi.Rectangle function, but it is easy to be time-consuming during the adjustment process.

Is there any way to write that allows me to manually adjust the roi size and position in the image, and return the pixel value of the roi adjusted position

close all

I = imread('rice.png'); % your input image

figure, imshow(I);

roi = images.roi.Rectangle(gca,'Position',[80,45,80,100]);

Answer 1

[Matt J]

h=drawrectangle();
wait(h);

You must double-click on the rectangle to confirm its position and return control to Matlab.

[chihyu]

After I follow deer Matt and the URL below, I succeeded. Thanks.

https://ww2.mathworks.cn/matlabcentral/answers/732603-drawrectangle-drawcircle-drawellipse-and-drawpolyon-draw-region-of-interest-at-wrong-position

ROI = drawrectangle('Color', 'r')

x1 = ROI.Position(1);

x2 = x1 + ROI.Position(3) - 1;

y1 = ROI.Position(2);

y2 = y1 + ROI.Position(4) - 1;

caption = sprintf('x1 = %.1f, x2 = %.1f, y1 = %.1f, y2 = %.1f',...

x1, x2, y1, y2)

title(caption, 'FontSize', 15)

wait(ROI);

x1 = ROI.Position(1);

x2 = x1 + ROI.Position(3) - 1;

y1 = ROI.Position(2);

y2 = y1 + ROI.Position(4) - 1;

captionNEW = sprintf('x1 = %.1f, x2 = %.1f, y1 = %.1f, y2 = %.1f',...

x1, x2, y1, y2)

title(captionNEW, 'FontSize', 15)

[Matt J]

You're welcome, but please Accept-click the answer to indicate that it resolved your question.