how can use otsu's method as a local thresholding?

hi all

how can use otsu's method as a local thresholding?

and which differences between these codes?

   I=graythresh(Img)

and

   I=multithresh(Img)

when I use each of this code, the result is same. I can not understand the diffrences between graythresh and multithresh:(.

thanks

Answer 1

[Image Analyst]

I use a local Otsu in this locally adaptive document background correction demo, attached.

[jack nn]

Really thanks for your help!

if I want to used this code how can I reference to this?

are you author? if yes,how can I reference to your paper? :)

[Image Analyst]

The algorithm is, as best as I can remember, one I saw presented at the Color Imaging Conference in San Francisco about 2 or 3 years ago. I didn't have the paper so I just had to go by memory. You don't need to reference me - I give tons of demos here and people are free to use them or adapt them.

[Shel]

Hi, I have seen the code and thanks a lot for that, but can I ask how it is possible to use it for dicom images ? Thanks

[Image Analyst]

Use dicomread() instead of imread().

[Shel]

Thanks, but can you please tell me what is the function fun = @(x) LocalOtsu(x)? as it is not recognized by the program.Thank you

[Image Analyst]

That function is included in the file I attached. How could it not be recognized? It's right in there. Did you only copy part of it? Or delete it by accident? Click on document_threshold.m above and scroll to the bottom and you'll see it.

Answer 2

[Shel]

Hello, Did you find the answer to your question? if so, can you please share it with me?