where is activation_fn defined?

[xinghedyc]

Hi,everyone
I see activation_fn function in ops.py, but I can't find where it's defined and implemented.

I'm also confused about this function,
def binarize(images):
return (np.random.uniform(size=images.shape) < images).astype('float32')

Sorry, I'm really new to this architecture, could someone explain these two functions above?
Thanks all.

[anantzoid]

You can pass the activation_fn in conv2d as relu, sigmoid, tanh etc.

binarize function converts pixel intensities to binary values. Try declaring an array: ar = np.asarray([[0.12,1.2], [1.1, 0.5]]) and call the function.

@carpedm20 Have you tried using just 0.0 < images rather than np.random ? Shouldn't the former be a better choice?

[xinghedyc]

Thanks a lot!@anantzoid
I get it,
but I just don't understand why np.random used in binarize function right now.