Hi,
To indicate specific points in the figure window which display an image, you can first use “hold on” which will allow you to overlay plots on the current figure without erasing the image. Then define the coordinates of the points you want to indicate on the figure and pass them to the “plot” function. Finally, use “hold off” to release the “hold on” the current figure. Refer to an example code below for better understanding:
% Read the image
img = imread('your_image.jpg');
% Display the image
imshow(img);
hold on; % Hold the current figure
% Define the points you want to plot
x = [50, 100, 150]; % X-coordinates of the points
y = [75, 125, 175]; % Y-coordinates of the points
% Plot the points on the image
plot(x, y, 'r*', 'MarkerSize', 10, 'LineWidth', 2);
% Release the hold on the current figure
hold off;
