def predict(img, net):
# X = image.imread(img)
X = nd.array(img)
X = normalize_image(X).as_in_context(CTX[0])
# X = (X.astype('float32') / 255).as_in_context(CTX[0])
X = X.transpose((2, 0, 1)).expand_dims(axis=0)
pred = nd.argmin(net(X), axis=1)
# pred = net(X) > 0.01
return pred.reshape((X.shape[2], X.shape[3]))
def getclass(rgb, cls_items):
result = nd.zeros((cls_items.shape[0], ), ctx)
for i in range(cls_items.shape[0]):
delta = (rgb -
cfg.rgb_dic[str(int(cls_items[i]))]).abs().mean().asscalar()
result[i] = delta
get_cls = nd.argmin(result, axis=0).asscalar()
cls_return = int(cls_items[int(get_cls)])
return cls_return
def knn_search(feature_matrix, features):
"""
Given features and feature matrix, using KNN method to find the nearest class.
给定特征矩阵和待搜索的特征之后，使用KNN搜索查询和特征最近的类别。
:param feature_matrix: feature matrix 特征矩阵
:param features: class uncertained features 待确定类别的特征
:return predictions: class predictions 预测类别
"""
predictions = []
for feature in features:
diff = feature - feature_matrix
diff = nd.square(diff)
diff = nd.sum(diff, axis=1)
prediction = nd.argmin(diff, axis=0)
predictions.append(prediction.asscalar())
return nd.array(predictions)
def bulyan(epoch, gradients, net, lr, byz, f=0):
param_list = [
nd.concat(*[xx.reshape((-1, 1)) for xx in x], dim=0) for x in gradients
]
param_list = byz(epoch, param_list, net, f, lr, np.arange(len(param_list)))
k = len(param_list) - f - 2
dist = mx.nd.zeros((len(param_list), len(param_list)))
for i in range(0, len(param_list)):
for j in range(0, i):
dist[i][j] = nd.norm(param_list[i] - param_list[j])
dist[j][i] = dist[i][j]
sorted_dist = mx.nd.sort(dist)
sum_dist = mx.nd.sum(sorted_dist[:, :k + 1], axis=1)
bulyan_list = []
bul_client_list = np.ones(len(param_list)) * (-1)
for i in range(len(param_list) - 2 * f):
chosen = int(nd.argmin(sum_dist).asscalar())
sum_dist[chosen] = 10**8
bul_client_list[i] = chosen
bulyan_list.append(param_list[chosen])
for j in range(len(sum_dist)):
sum_dist[j] = sum_dist[j] - dist[j][chosen]
sorted_array = nd.sort(nd.concat(*bulyan_list, dim=1), axis=-1)
trim_nd = nd.mean(sorted_array[:, f:(len(bulyan_list) - f)],
axis=-1,
keepdims=1)
idx = 0
for j, (param) in enumerate(net.collect_params().values()):
if param.grad_req == 'null':
continue
param.set_data(
param.data() - lr *
trim_nd[idx:(idx + param.data().size)].reshape(param.data().shape))
idx += param.data().size
return trim_nd, bul_client_list
embedd = nd.stack(*[embedd_d[key] for key in sorted(embedd_d)], axis=0)
router_mat = nd.stack(*[router_mat_d[key] for key in sorted(router_mat_d)],
axis=1)
where = nd.argmax(nd.maximum(0, 1 / (router + 0.5)), axis=1)
nd.maximum(0, 1 / (router + 0.5))
where
presence = nd.sum(router_mat, axis=2)
weight_adj = presence * weight
weight
router + 0.5
nd.argmin(nd.abs(router + 0.5), axis=1)
router_mat[1][4]
depth
where = nd.argmin(nd.abs(router + 0.5), axis=1)
nd.concat(*[router_mat[i][k] for i, k in enumerate(where)], dim=0)
depth = len(tree._weightlayer) - nd.topk(nd.reverse(presence, axis=1))
depth -= 1
depth = depth[:, 0]
remainder = 1 - nd.sum(weight_adj, axis=1)
remainder += nd.choose_element_0index(weight_adj, depth)
weight_adj = nd.fill_element_0index(weight_adj, remainder, depth)
def decode_centernet_pose(heat, wh, kps, reg=None, hm_hp=None, hp_offset=None, K=100):
batch, cat, height, width = heat.shape
num_joints = kps.shape[1] // 2
# perform nms on heatmaps
heat = _nms(heat)
scores, inds, clses, ys, xs = _topk(heat, K=K)
kps = _tranpose_and_gather_feat(kps, inds)
kps = nd.reshape(kps, (batch, K, num_joints * 2))
kps[:, :, ::2] += nd.reshape(xs, (batch, K, 1)).broadcast_to((batch, K, num_joints))
kps[:, :, 1::2] += nd.reshape(ys, (batch, K, 1)).broadcast_to((batch, K, num_joints))
if reg is not None:
reg = _tranpose_and_gather_feat(reg, inds)
reg = nd.reshape(reg,(batch, K, 2))
xs = xs.reshape((batch, K, 1)) + reg[:, :, 0:1]
ys = ys.reshape((batch, K, 1)) + reg[:, :, 1:2]
else:
xs = xs.reshape((batch, K, 1)) + 0.5
ys = ys.reshape((batch, K, 1)) + 0.5
wh = _tranpose_and_gather_feat(wh, inds)
wh = wh.reshape((batch, K, 2))
clses = clses.reshape((batch, K, 1)).astype('float32')
scores = scores.reshape((batch, K, 1))
bboxes = nd.concat(xs - wh[:, :, 0:1] / 2,
ys - wh[:, :, 1:2] / 2,
xs + wh[:, :, 0:1] / 2,
ys + wh[:, :, 1:2] / 2,
dim=2)
if hm_hp is not None:
hm_hp = _nms(hm_hp)
thresh = 0.1
kps = kps.reshape((batch, K, num_joints, 2))
kps = nd.swapaxes(kps, 1, 2) # b x J x K x 2
reg_kps = nd.expand_dims(kps, axis=3).broadcast_to((batch, num_joints, K, K, 2))
hm_score, hm_inds, hm_ys, hm_xs = _topk_channel(hm_hp, K=K) # b x J x K
if hp_offset is not None:
hp_offset = _tranpose_and_gather_feat(hp_offset, hm_inds.reshape((batch, -1)))
hp_offset = hp_offset.reshape((batch, num_joints, K, 2))
hm_xs = hm_xs + hp_offset[:, :, :, 0]
hm_ys = hm_ys + hp_offset[:, :, :, 1]
else:
hm_xs = hm_xs + 0.5
hm_ys = hm_ys + 0.5
mask = (hm_score > thresh).astype('float32')
hm_score = (1 - mask) * -1 + mask * hm_score
hm_ys = (1 - mask) * (-10000) + mask * hm_ys
hm_xs = (1 - mask) * (-10000) + mask * hm_xs
hm_kps = nd.stack(hm_xs, hm_ys, axis=-1).expand_dims(axis=2).broadcast_to((batch, num_joints, K, K, 2))
dist = (((reg_kps - hm_kps) ** 2).sum(axis=4) ** 0.5)
min_dist = dist.min(axis=3) # b x J x K
min_ind = nd.argmin(dist, axis=3) # b x J x K
M, N, K = hm_score.shape[0:3]
for i in range(M):
for j in range(N):
for k in range(K):
hm_score[i, j, k] = hm_score[i, j, min_ind[i, j, k]]
hm_score = hm_score.expand_dims(axis=-1)
min_dist = min_dist.expand_dims(-1)
hm_kps = hm_kps.reshape((batch, num_joints, K, 2))
for i in range(M):
for j in range(N):
for k in range(K):
hm_kps[i, j, k, 0] = hm_kps[i, j, min_ind[i, j, k], 0]
hm_kps[i, j, k, 1] = hm_kps[i, j, min_ind[i, j, k], 1]
l = bboxes[:, :, 0].reshape((batch, 1, K, 1)).broadcast_to((batch, num_joints, K, 1))
t = bboxes[:, :, 1].reshape((batch, 1, K, 1)).broadcast_to((batch, num_joints, K, 1))
r = bboxes[:, :, 2].reshape((batch, 1, K, 1)).broadcast_to((batch, num_joints, K, 1))
b = bboxes[:, :, 3].reshape((batch, 1, K, 1)).broadcast_to((batch, num_joints, K, 1))
mask = (hm_kps[:, :, 0:1] < l) + (hm_kps[:, :, 0:1] > r)
mask += (hm_kps[:, :, 1:2] < t) + (hm_kps[:, :, 1:2] > b)
mask += (hm_score < thresh)
mask += (min_dist > (nd.maximum(b - t, r - l) * 0.3))
mask = (mask > 0).astype('float32').broadcast_to((batch, num_joints, K, 2))
kps = (1 - mask) * hm_kps + mask * kps
kps = nd.swapaxes(kps, 1, 2).reshape((batch, K, num_joints * 2))
detections = nd.concat(bboxes, scores, kps, clses, dim=2)
return detections
def argmin(data=None, axis=None):
res = nd.argmin(data, axis)
if res.shape == (1, ):
return res.astype('int32').asscalar()
else:
return res