LoG Filter
[Laplace Filter](https://texonom.com/laplace-filter-a59f4cdd29a34a669765c5cd786eb21b) [DoG Filter](https://texonom.com/dog-filter-1f531254ce2b43749a5d8cf714f7faa6) 


combine Laplace filtering with Gaussian filtering
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fe457d2f5-1663-405e-8db7-ea6c247cbcfc%2FUntitled.png?table=block&id=24429492-32b4-4903-b7c9-cf0d2b009dfe&cache=v2)

### Zero-crossing
We don’t have to find to maximum peak, we can use very accurate zero-crossing 
So we don’t have to find maximum like [DoF Filger](https://texonom.com/dof-filger-7dbc85fbe7bd45fbb58f610ee777a2e1) 
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Ffcc1b415-b2af-4464-8390-9b3ab75df673%2FUntitled.png?table=block&id=a66c69b2-38f3-4e45-ae58-2a7ebd3cf4cf&cache=v2)







