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?
Hope this helps
import numpy as np
import pywt
import cv2
def w2d(img, mode='haar', level=1):
imArray = cv2.imread(img)
#Datatype conversions
#convert to grayscale
imArray = cv2.cvtColor( imArray,cv2.COLOR_RGB2GRAY )
#convert to float
imArray = np.float32(imArray)
imArray /= 255;
# compute coefficients
coeffs=pywt.wavedec2(imArray, mode, level=level)
#Process Coefficients
coeffs_H=list(coeffs)
coeffs_H[0] *= 0;
# reconstruction
imArray_H=pywt.waverec2(coeffs_H, mode);
imArray_H *= 255;
imArray_H = np.uint8(imArray_H)
#Display result
cv2.imshow('image',imArray_H)
cv2.waitKey(0)
cv2.destroyAllWindows()
w2d("test1.png",'db1',10)