noise_estimate
参考 An efficient statistical method for image noise level estimation ICCV 2015
https://www.computer.org/csdl/proceedings/iccv/2015/8391/00/8391a477-abs.html
参考 An efficient statistical method for image noise level estimation ICCV 2015
https://www.computer.org/csdl/proceedings/iccv/2015/8391/00/8391a477-abs.html