How to plot lines on image ?

How to plot lines on image ?

Answer 1

[Selva Karna]

grid on;

ax = gca

ax.XColor = 'r';

ax.YColor = 'r';

ax.GridAlpha = 0.9;

% ax.GridColor = [0.1, 0.7, 0.2];

ax.GridColor = [0.9, 0, 0];

yticks(0:0.25:4)

xticks(0:0.125:8)

ax.GridColor = [0.9, 0, 0];

set(gcf, 'PaperUnits', 'inches');

set(gcf, 'PaperPosition', [0 0 10 10]);

saveas(gcf,'sk.png')

[voxey]

Thanks lot.......................

Answer 2

[Image Analyst]

The other answer will put a periodic grid over the image. If you want arbitrary lines from (x1,y1) to (x2, y2), you can use plot() or line().

hold on; % Make sure plot() does not blow away the image.
line(x, y, 'Color', 'r'); % OR....
plot(x, y, 'r-');

Yet another option is to place a line plot (like your question's tag) over the image. For that, see the attached m-file.

From your question, it is not clear what kind of lines you want.

[voxey]

Thanks .... but its not expected results.......