How can I write text on a JPG and save it without displaying (R2010b)

Hello,

I have an image (jpg) and I want to add text in it without showing anything on the screen. I followed this link (the first part, with the "tmask" stuff) but it pop up the text. I'm on Matlab 2010b so the function inserText is not available.

Thanks, Valentin

Answer 1

[Image Analyst]

I don't know of any other way to do it without displaying the image.

If you can tolerate displaying it, you can use export_fig() by Yair Altman in the File Exchange. Use text() to put your text and any other graphics in the overlay, then use export_fig() to save it to a file.

Is getting a more modern version with that toolbox completely out of the question?

[Valentin Debris]

I find a way using export_fig(), and it doesn't display the figure. It's not perfect (it resizes a little the image) but for my case, I don't care.

im = imread('C:\Users\Users\Downloads\losange.jpg');

hf = figure('color','white','Visible','Off'); 
set(gca,'units','pixels','position',[5 5 size(im,2)-1 size(im,1)-1],'Visible','Off')

%display the image in the figure
image(im)
axis off;
hold on;

%put the text
text('units','pixels','position',[10 20],'fontsize',15,'string','test1');

%get the final image based on the axe
%export_fig is developped by Yair Altman (in the File Exchange)
imageWithTxt = export_fig(findobj(hf,'type','axes'));

%save the image
imwrite(imageWithTxt ,'losangeTxt.jpg');