Finding threshold value with Otsu Method

I'm trying to do laser tracking. First of all, I detect laser points on the image. However, I could not find the threshold. I have to write with the "Otsu" method, not the ready-made threshold method. Help please

[Francesco Pignatelli]

level = graythresh(yourimage)

Answer 1

[Sean de Wolski]

doc graythresh

[RABIA OZKAN]

I can't use this prepared threshold function.

[Sean de Wolski]

You could use multithresh instead.

[RABIA OZKAN]

No... I mean, I have to do it without using the preset threshold function. Thanks.

[Amine MEKKI]

hey did u find how to do it without thr threshold function

[DGM]

If you can't use existing tools, you'll have to explain why. If you can't use tools that someone else wrote, why would you be able to use anything that the forum would give you?