Question

I have an image and after drawing some features(ellipses and text) on it I want to save it as JPEG.

h= figure(1);
imagesc(im_name);
colormap('gray');
hold on
for i=1:no_of_points;
//draw features and write some text
end
hold off
imsave (h);

I am getting a figure with features drawn on it but when I save it, it is an image (which is my orignal image ‘im_name’) without new features on it.

I tried also

.
.
.

imsave (h);
hold off

Thanx in advance for your help.

Answer 1

Maybe you should try the function saveas

saveas

Save figure or Simulink block diagram using specified format

Alternatives

Use File > Save As on the figure window menu to access the Save As
dialog, in which you can select a graphics format. For details, see
Exporting in a Specific Graphics Format in the MATLAB Graphics
documentation. Sizes of files written to image formats by this GUI and
by saveas can differ due to disparate resolution settings. Syntax

saveas(h,’filename.ext’) saveas(h,’filename’,’format’)

Description

saveas(h,’filename.ext’) saves the figure or Simulink block diagram
with the handle h to the file filename.ext. The format of the file is
determined by the extension, ext. Allowable values for ext are listed
in this table.

You can pass the handle of any Handle Graphics object to saveas, which
then saves the parent figure to the object you specified should h not
be a figure handle. This means that saveas cannot save a subplot
without also saving all subplots in its parent figure.