OpenCV Mat Edit




- setTo (mat, mask)
> - noArray() = Mat()
> [이미지의 기하학적 변형 - gramman 0.1 documentation](https://opencv-python.readthedocs.io/en/latest/doc/10.imageTransformation/imageTransformation.html)



# Color


- normalize
> - normalize norm






# Brightness


- template inline uchar saturate_cast<uchar> (int v)



# Histogram


### Graph of same Pixel data count
- streching
> just stretch 1 dimension
$$H(g) = \Sigma_{0<i<g}{h(i)}$$
- equalization
> take interval as how much thy are






