Question

4) Consider the image a) and use morphological operations to perform: a) Count the number of blobs in the image. (Hint: use bwlabel, bwselect_MATLAB commands) b) Which morphological operations should be employed to get images b, c, and d? Verify your answer. (a) (b) (c) (d)

Answer 1

Answer

Morphology is an image processing technique that based on shape of the object. Morphological operations apply a structuring element to our input image, creating an output image of the same size. In a morphological operation, please refer internet for more details about Morphology, Actually there are two type of morphological operation, they are

• dilation
• erosion

Dilation adds pixels to the boundaries of objects,Erosion removes pixels on object boundaries. please refer internet about more details about erosion and dialation

Here we have an image circles.png, i downloaded from the internet. I will give full code about the question.

a) For count the blob/object we can use bwlabel() function. it will Label connected components in a binary image

[L,num] = bwlabel(image,connctivity) %returns in num the number of connected objects found in image.

image = imread('circles.png'); %here is code for obeject counting
[L,N] = bwlabel(image,4); %4 connected  N have the value of object
figure
imshow(L)

b)Morphological operation for a,b,c

Here we can see first image is default inary image called circles.png

The image c uses the morphological operation bwskel() ,that means Skeletonize objects in a binary image. So we can use that function for these code is given below

image=imread('circles.png')
image2 = bwskel(BW);   % skeltionaize the object
montage({BW,BW2},'BackgroundColor','black','BorderSize',10)

image d uses the the operation bwperim() ,that find the perimeter of objects in a binary image.

code is given below

figure
image=imread('circles.png')
image3 = bwperim(image,8);  % 8 connectivity used
imshowpair(image,image3,'montage')

e 14 Figure 14 Figure 16 * Figure 17 X) + mes

You can refer more details on intenet about morphological operation. Any doubt please comment. And upvote tooo.... Thanks in advance