93663c2cc8c0c8bc3c6f28c27679707305948c80,tests/test_texture.py,,test_cooccurence,#,4

Before Change

def test_cooccurence():
    cooccurence = mahotas._texture.cooccurence
    f = np.array([
          [0,1,1,1],
          [0,0,1,1],
          [2,2,2,2],
        ])
    res = np.zeros((5,5), np.long)
    cooccurence(f, res, 0)
    assert res[0,0] == 1
    assert res[0,1] == 2
    assert res[1,0] == 0
    assert res[1,1] == 3
    assert res[2,2] == 3
    assert not np.any(res[2,:2])
    assert not np.any(res[:2,2])
    res[:3,:3] = 0
    assert not np.any(res)

    res = np.zeros((5,5), np.long)
    cooccurence(f, res, 1)
    assert res[0,0] == 1
    assert res[0,1] == 0

After Change

    f = np.random.rand(32, 32)
    f = (f * 255).astype(np.int32)

    assert np.all(mahotas.texture.cooccurence(f, 0) == brute_force(f, 0, 1))
    assert np.all(mahotas.texture.cooccurence(f, 1) == brute_force(f, 1, 1))
    assert np.all(mahotas.texture.cooccurence(f, 2) == brute_force(f, 1, 0))
    assert np.all(mahotas.texture.cooccurence(f, 3) == brute_force(f, 1, -1))

Instances