How can I find center coordinates of six black rectangles in a image with HitMiss transformation?

Hey everyone! In my image, there are six black rectangles in size 11 x 11 pixels. I have to use the method of the Hit-or-Miss transform

to find the centre coordinates of these rectangles and also I cannot use function BWHITMISS.Therefore, I have my erosion,dilation function (without imerode or imdilate).I have to use these function while doing hit-miss transform.How can I find center coordinates of six black rectangles in the image with HitMiss transformation? Thanks for your attention by now!

The attached are my image and erosion and dilation functions.

[KALYAN ACHARJYA]

Is it fixed to be use Hit-or-Miss ransform or we can approach other way also?

[Ayberk Ay]

I have to use hit ot miss transform to find centers.

Answer 1

[KALYAN ACHARJYA]

bwImage=imread('semafor.bmp');
result=bwareaopen(~(bwImage | bwareafilt(~bwImage,1)),50);
imshow(result);

Now get the indices & calculate the mid spatial positions

[Ayberk Ay]

I cannot use the MATLAB functions. I did my codes for erosion and dilation and I have to use them and use hit or miss method.

[Image Analyst]

Why not??? Why not take advantage of the power MATLAB gives you? Otherwise you could just do it in some low level language like Java or Python.

http://www.mathworks.com/matlabcentral/answers/38787-what-can-be-programmed-without-any-built-in-functions

[Ayberk Ay]

oh sorry sir, I forgot to delete this question, I solved this already and the teacher don't want me to use matlab functions, otherwise I could use them of course :) thanks anyways.

[Image Analyst]

I've added the tag "Homework" to your post. In the future, please do that so that we don't give you complete solutions which would get you into ethical trouble with your teacher, or lead you to deleting questions, which would lead to displeasure from Answers people who took the time and trouble to help you. If you do delete something, do it very quickly, before anyone has answered it or else there's a chance it might be restored.

[Ayberk Ay]

oh I see, thanks for this info. I'll be more careful about asking questions.