Blurs the Input Image
img_ret=cv_blur(image,kernel_size)
Input Image
It requires a list specifying the size of Kernel needed: example (5,5)
Returned Image after blackhat operation
Provides the function of Blurring/Averaging
this function simply takes the average of all the pixels under kernel area and replaces the central element with this average. This is done by the function cv2.blur().For more information on kernel type see structuring element section of http://opencv-python-tutroals.readthedocs.org/en/latest/py_tutorials/py_imgproc/py_morphological_ops/py_morphological_ops.html