Problem:

Write an application that uses morphological operators to extract corners from an image using the following algorithm:

1. R1 = Dilate(Img,cross)

2. R1 = Erode(R1,Diamond)

3. R2 = Dilate(Img,Xshape)

4. R2 = Erode(R2,square)

5. R = absdiff(R2,R1)

6. Display(R)

Transform the input image to make it compatible with binary operators and display the results imposed over the original image. Apply the algorithm at least on the following images Rectangle and Building.