Python 实现RGB和YUV互转

RGB和YUV互转

class Color:
    # BT601 数字Full range
    def __init__(self):
        pass

    def YUV2RGB(self, Y, U, V):
        # R,G,B (0~255)
        R= Y + ((360 * (V - 128))>>8)
        G= Y - (( ( 88 * (U - 128)  + 184 * (V - 128)) )>>8) 
        B= Y +((455 * (U - 128))>>8) 
        return R,G,B
    
    def RGB2YUV(self, R, G, B):
        # Y(0~255),  U,V(-128~128)          
        Y = (77*R + 150*G + 29*B)>>8
        U = ((-44*R  - 87*G  + 131*B)>>8) + 128
        V = ((131*R - 110*G - 21*B)>>8) + 128
        return Y,U,V
    
    def YUV2RGBF(self, Y, U, V):
        # R,G,B (0.0~255.0)
        R = Y+1.4075*(V-128)
        G = Y-0.3455*(U-128)-0.7169*(V-128)
        B = Y+1.779*(U-128)
        return R,G,B
    
    def RGB2YUVF(self, R, G, B):
        # Y(0.0~255.0),  U,V(-128.0~128.0)
        Y = 0.299*R + 0.587*G + 0.114*B
        U = -0.169*R - 0.331*G + 0.5*B + 128
        V = 0.5*R - 0.419*G - 0.081*B + 128
        return Y,U,V


# 测试代码:    
color = Color()

y,u,v = color.RGB2YUV(255, 255, 255)
print("Y:{:.02f}, U:{:.02f}, V:{:.02f}".format(y, u, v))

r,g,b = color.YUV2RGB(y,u,v)
print("R:{:.02f}, G:{:.02f}, B:{:.02f}".format(r, g, b))
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