overlay lines on an image when you know angle and distance from origin in matlab

To overlay a line on an image in Matlab, you can use the line function. You will need to know the angle and distance from the origin of the line.

Assuming you have the image loaded as a variable img, you can plot the line on the same figure using the following steps:

1. Calculate the endpoint of the line using its angle and distance from the origin.
2. Call the line function with the coordinates of the start and end points of the line.

Here's an example implementation:

main.m
% Load image
img = imread('path/to/image.jpg');

% Set origin coordinates
x0 = 0;
y0 = 0;

% Set angle and distance from origin
theta = 45; % in degrees
d = 50; % in pixels

% Calculate endpoint of line
x1 = x0 + d*cosd(theta);
y1 = y0 + d*sind(theta);

% Plot line on image
imshow(img)
hold on % to prevent image from being replaced when plotting
line([x0, x1], [y0, y1], 'Color', 'r', 'LineWidth', 2)
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In this example, we assume the origin of the line is at (x0, y0) = (0, 0). We then calculate the endpoint (x1, y1) using the angle theta and distance d.

Finally, we plot the line on top of the image using the line function. We set the color of the line to red and the line width to 2 for visibility.