I am loading a RGB image(864x1152) in Image operation.py file available in PyNCv lib. Chose the option of Image color conversion -> Egray 256. The output image is just a white screen. The conversion of RGB to Gray(256) doesn't take place.What might be the reason. I didn't change the code.Initially I thought there is some problem with the code or its taking time to show the output...but its not the case as other operations of same code work and output comes...What might be the problem ?