Open CV Filtering




### mast = window = kernel (usually 3x3)
- usually black and white cv_u8
- execute for not zery



# Kind


- (gausian) blur <> sharpening - used for out focusing
- embosing → edge
- remove noise = remove gausian noise from camera
> - **edge-preserving noise removal filter - bilateral filter**
> - median filering - remove  salt & pepper noise



# function


- SetTo(inputarrary value, inputarrary mask = noaarrary)
- copyTo(output img, input mask)
- 


# Anchor Point







# Correlation and Convolution


- correlation
> - mast

- convolution
> - multiply after Origin symmetry
usually same in cv because in cv filter mask is symmetry






