what is wrong with my code

1-Write the program that determines the number of balloons in the picture below and the green rectangle around each balloon in the picture.

Bal=imread('ballons.jpg');
B=Bal(:,:,3);
d1x = [1 0 -1];
d1y = [1;0-1];
Bx = conv2(B,d1x,'same');
By = conv2(B,d1y,'same');
J = sqrt((Bx.^2)+(By.^2));

K = J>25;
L = imclearborder(K);
K=edge(K, 'Canny');
M = imfill(L,'holes');
N = bwareaopen(M,350);
figure, imshow(Bal);
stats = regionprops(N, 'BoundingBox', 'Centroid');
hold on;
 for object = 1:length(stats)
        bb = stats(object).BoundingBox;
        bc = stats(object).Centroid;
        rectangle('Position',bb,'EdgeColor','g','LineWidth',2)
        plot(bc(1),bc(2), '')
    end
hold off
area = sum(sum(N))
O = bwmorph(N,'remove');
perimeter = sum(sum(O))
[B,L] = bwboundaries(N,'noholes');
hold on
[row,col] = find(N==1);
[a,b] = size(N);
mask = false(a,b);
mask(min(row):max(row),min(col):max(col)) = 1;
mask = bwperim(mask,8);
mask = imdilate(mask,strel('square',4));
R = Bal(:,:,1);
G = Bal(:,:,2);
B = Bal(:,:,3);
R(mask) = 255;
G(mask) = 255;
B(mask) = 0;
RGB = cat(3,R,G,B);
hsv=rgb2hsv(Bal);
v=hsv(:,:,3);
range=[50 600]/750;
mask=(v>range(1)) & (v<range(2));
mask=imcomplement(mask);
se=strel('disk',2);
mask=imerode(mask,se);
mask=bwareaopen(mask,20);
[info, total]=bwlabel(mask);
mrk=regionprops(mask,'centroid');
XY=cat(1,mrk.Centroid);
hold on;
title(['All balons numbers : ',num2str(total)]);
B= double(rgb2gray(Bal));
d1x = [-1 0 1];
d1y = [-1;0;1];
Bx = conv2(B,d1x,'same');
By = conv2(B,d1y,'same');
J = sqrt((Bx.^2)+(By.^2));
K = J>50;
L = imclearborder(K);
M = imfill(L,'holes');
N = bwareaopen(M,6000);
[row,col] = find(N==1);

[Steven Lord]

This sounds like a homework assignment. If it is, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.

If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the MATLAB Onramp tutorial (https://www.mathworks.com/support/learn-with-matlab-tutorials.html) to quickly learn the essentials of MATLAB.

If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.

[Image Analyst]

I doubt that would work. Did you try the way I suggested below?

[cem yanbul]

i will

Answer 1

[Image Analyst]

I'd start by using the Color Thresholder in HSV space to find green, then mask out the grass. Then I'd convert to HSV color space and look for blobs that have high S value. Use imclose() on the mask to merge together blobs that are not quite touching though they should be. Use bwareafilt() to get only those in a certain size range. Then call regionprops(mask, 'BoundingBox') and finally put in a loop where you call rectangle().

Attach your code if you need any more help.

[cem yanbul]

thanks