How to save a figure with inside an image and a plot ?

Hello,

I would like to read an image and to plot anything inside. Then save this figure with a good resolution. I used this code :

   figure,
    imshow(image);
    hold on;
    plot(...);
    hold off;
    F = getframe;
    imwrite(F.cdata,directory);

But the image out dont' have the same resolution that image in. Could you help me please ?

Answer 1

[Image Analyst]

Is your image bigger than your screen? Then it won't do what you want.

Try export_fig(). http://www.mathworks.com/matlabcentral/fileexchange/index?sort=downloads_desc&term=

[Axel L]

Yes my image is bigger than my screen.

Answer 2

[Youssef Khmou]

Axel,

By using the format TIFF, you can control the resolution horizontally and vertically , that is also available for other extensions, like JPEG you have the parameter Quality , or PNG that contains two scalars XResolution & YResolution , here is an example :

I=imshow(imread('circuit.tif'));
hold on,
plot(100*randn(100,1))
hold off
F=getframe;
imwrite(F.cdata,'C:\test.tiff','resolution',[100 100])