Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Emulating Fuji Provia

Provia has a strong contrast and is slightly cool (blue) throughout most tones. Sky, water, and shade are enhanced more than the sun. Let's add this implementation of a Provia filter to filters.py:

class BGRProviaCurveFilter(BGRCurveFilter):    """A filter that applies Provia-like curves to BGR."""    def __init__(self, dtype=numpy.uint8):        BGRCurveFilter.__init__(            self,            bPoints = [(0,0),(35,25),(205,227),(255,255)],            gPoints = [(0,0),(27,21),(196,207),(255,255)],            rPoints = [(0,0),(59,54),(202,210),(255,255)],            dtype = dtype)

Next up is our Fuji Velvia filter.