@Stormborec
This is what I mean:
Code:
y = converttoy8()
u = utoy8()
v = vtoy8()
y_scaled = y.bicubicresize(width(u), height(u))
y_adjusted = mt_lut(y,expr="x")
u_adjusted = mt_lutxy(u,y_scaled,expr="x y 16 - 0.1 * +")
v_adjusted = mt_lutxy(v,y_scaled,expr="x y 16 - 0.1 * +")
ytouv(u_adjusted,v_adjusted,y_adjusted) # note that the order here is U, V, Y