Matlab Code for Identifying the Objects Based on Labeling

Steps To Be Performed:


1. Convert the RGB image to binary image.

2. Fill the holes in the image.

3. Label the objects in the image based on connectivity 8

4. Display the images in a RGB format

4.1.  Store the co-ordinates(x,y) of the object 1 which is  labeled as 1.

4.2.  Calculate the image size for object one. The length can be found by subtracting the maximum
and the minimum of y values. Similary for x find the width by subtracting the maximum and minimum of x values.

4.3.  Now map the pixel value to the new image.

Fig: Input Image

MATLAB CODE

A=imread('num2.jpg');

figure,imshow(A);

title('Original image');

C=~im2bw(A);

B=imfill(C,'holes');

label=bwlabel(B,8);

for j=1:max(max(label))

[row, col] = find(label==j);

len=max(row)-min(row)+2;

breadth=max(col)-min(col)+2;

target=uint8(zeros([len breadth 3] ));

sy=min(col)-1;

sx=min(row)-1;

for i=1:size(row,1)

    x=row(i,1)-sx;

    y=col(i,1)-sy;

    target(x,y,:)=A(row(i,1),col(i,1),:);

end

mytitle=strcat('Object Number:',num2str(j));

figure,imshow(target);title(mytitle);

end

The objects that are displayed in a RGB format.

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