How to perform grayscale reconstruction by erosion

On a gray scale image i want to perform reconstruction by erosion as well as reconstruction by dilation.

Answer 1

[Image Analyst]

There is an imreconstruct that does reconstruction. You give it a smaller "marker" image and your larger binary image and it returns an image with only the blobs that have marker(s) in them. See my attached demos.

[rky]

I know Imreconstruct is used for reconstruction purpose but my problem is as below

I have image f1

Then, I need to find regional minima RMIN of f1 as

f2 = RMIN(f1) = R* f1 (f1+1) - f1

where, R* f1 (f1 + h) is the grayscale reconstruction by erosion using f1 and (f1 + 1) as mask and marker images, respectively and R* is for reconstruction.

I want to learn all concepts of morphological image processing so please can you tell references for the same.

Thanks in advance

[Image Analyst]

I suggest you use a web search engine to locate online textbooks such as

http://szeliski.org/Book/

http://homepages.inf.ed.ac.uk/rbf/CVonline/LOCAL_COPIES/OWENS/LECT6/lect6.html

[rky]

ok

but can you tell how to solve below problem

I know Imreconstruct is used for reconstruction purpose but my problem is as below

I have image f1

Then, I need to find regional minima RMIN of f1 as

f2 = RMIN(f1) = R* f1 (f1+1) - f1

where, R* f1 (f1 + h) is the grayscale reconstruction by erosion using f1 and (f1 + 1) as mask and marker images, respectively and R* is for reconstruction.

[Image Analyst]

Why not use imregionalmin()?