Label Image

Script to place text label on the image without losing on the pixel information by pixel replacement

Description

This function is useful in placing text label, time-stamps, legends, etc. on the image without any loss in image quality. It also does not depend on the getframe method which renders the desktop useless during the process.

This is a function representation of the ImagePatchTool
http://www.mathworks.com/matlabcentral/fileexchange/25111-imagepatchtool
Different character set / fonts can also be generated using the ImagePatchTool and incorporated into this script.

Usage:
       iout = labelimg(original, label_text)
       iout = labelimg(original, label_text, location)

Please feel free to report bugs, feature request, comments and suggestions.

Acknowledgements

The author wishes to acknowledge the following in the creation of this submission:
ImagePatchTool

• Required Products: Image Processing Toolbox
• MATLAB release: MATLAB 7.10 (2010a)

[E B]

Could you provide an example of using this function with a given figure?

[Amitabh Verma]

You can try it out using the following

figure
ax(1) = subplot(1,2,1);
I = imread('rice.png');
imshow(I); title('Unlabelled image')

ax(2) = subplot(122);
iout = labelimg(I, 'This is a Rice Image');
imshow(iout); title('Labelled image')
imwrite(iout, 'rice_labelled.png')
% The saved image looks better than the figure window

[E B]

Thanks! Problem is, even with your code above, i can't see the label. i don't get any errors or problems, it displays and saves just fine, but just no label!

[Amitabh Verma]

I tested with R2012a and 2011b and it works fine for me.
I am suspecting it could be with the character encoding. Could you try the following and tell what output you get

>> unicode2native('abc')

[E B]

The output was 97 98 99. I'm running R2011a. I haven't tried anything else yet with your file but will be working on it again today. Thanks for your help.