Saving my image with the bounding box?

I'm saving my mask1 in a folder to visualize the image processing but i want to add to my image (when im using imwrite) my rectangle (BoundingBox) in the same image. I create my bounding box with :

s=find([numberOfblobs.Area]>500 & [numberOfblobs.Area]<3500);

Here's my code:

% function [ image ] = BatchLAB()
clear all;
close all;

%Delete images in output folder

delete('C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test\traiter\*.jpg');

% Go get all my Jpgs in my folder

files=dir('C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test\*.jpg');

addpath('C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test');

addpath('C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test\traiter');

%Batch processing loop

for k=1:numel(files)

           
      cform = makecform('srgb2lab');
      img=imread(files(k).name);
      imgLAB=applycform(img,cform);
      img1=imresize(imgLAB,[800 800]);      
      imgBW=im2bw(img1);       
      imgBW1 = bwmorph(imgBW,'shrink');
      imgBW2 = bwmorph(imgBW1,'majority');
      imgBW3 = bwmorph(imgBW2,'thin');
      mask = imopen(imgBW3, strel('Disk',1));
      mask1 = imfill(mask,[200 200],6);
      [L Ne]= bwlabel(mask1);
      numberOfblobs=regionprops(L,'all');

for n=1:size(numberOfblobs,1)
rectangle('Position',numberOfblobs(n).BoundingBox,'EdgeColor','r','LineWidth',2)
end

s=find([numberOfblobs.Area]>500 & [numberOfblobs.Area]<3500);

for n=1:size(s,2)
rectangle('Position',numberOfblobs(s(n)).BoundingBox,'EdgeColor','g','LineWidth',2)
end

output_name=['C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test\traiter\' files(1).name];

imwrite(mask1, ['C:\Documents and Settings\sidussault\Bureau\Projet intervention\Image test 3\00020_07_230_000D_D1_(0)_20110503_d\Test\traiter\' files(k).name]);

end

Answer 1

[Jeff E]

The rectangle function (and others like plot, scatter, etc) is useful inside of Matlab to visualize certain aspects of your data. However, you are somewhat limited in saving those plots.

A much more flexible approach is to create a second image using the bounding box coordinates, and then save that using imwrite just as you are doing with your mask image. I thought there were several examples of functions to do this in the File Exchange, but it looks like Brett has the only one...but a very flexible one at that: http://www.mathworks.com/matlabcentral/fileexchange/38721-embed-text-and-graphics-in-an-image

But, a web search for "matlab lineburning" will turn up a few more directed alternatives.