How to Combine pyWavelet and openCV for image processing?
Answer of Navaneeth is correct but with two correction:
1- Opencv read and save the images as BGR not RGB so you should do cv2.COLOR_BGR2GRAY to be exact.
2- Maximum level of _multilevel.py is 7 not 10, so you should do : w2d("test1.png",'db1',7)
I need to do an image processing in python. i want to use wavelet transform as the filterbank. Can anyone suggest me which one library should i use? 
I had pywavelet installed, but i don't know how to combine it with opencv. If i use wavedec2 command, it raise ValueError("Expected 2D input data.")
Can anyone help me?