matlab和python相等的函数

2018/04/20

In MATLAB： filter2 和 conv2

https://stackoverflow.com/questions/43270274/equivalent-of-matlab-filter2filter-image-valid-in-python/49932713#49932713

a=[[1, 2, 0, 0];[5, 3, 0, 4];[0, 0, 0, 7]; [9, 3, 0, 0]];
k=[[1,1,1];[1,1,0];[1,0,0]];
a_k=filter2(k, a, 'valid')
ak=conv2(a,rot90(k,2), 'valid')

In python: scipy.signal.convolve2d

a = np.array([[1, 2, 0, 0],[5, 3, 0, 4],[0, 0, 0, 7], [9, 3, 0, 0]])
k = np.array([[1,1,1],[1,1,0],[1,0,0]])
from scipy import signal
print(signal.convolve2d(a, np.rot90(k,2), mode='valid'))