class Predictor(object):
def __init__(self, symbol, data_names, label_names,
context=mx.cpu(), max_data_shapes=None,
provide_data=None, provide_label=None,
arg_params=None, aux_params=None):
self._mod = MutableModule(symbol, data_names, label_names,
context=context, max_data_shapes=max_data_shapes)
self._mod.bind(provide_data, provide_label, for_training=False)
self._mod.init_params(arg_params=arg_params, aux_params=aux_params)
def predict(self, data_batch):
self._mod.forward(data_batch)
return dict(zip(self._mod.output_names, self._mod.get_outputs()))
class SSHDetector:
def __init__(self, prefix, epoch, ctx_id=0, test_mode=False):
self.ctx_id = -1
if ctx_id >= 0:
self.ctx = mx.gpu(ctx_id)
else:
self.ctx = mx.cpu()
self.fpn_keys = []
fpn_stride = []
fpn_base_size = []
self._feat_stride_fpn = [32, 16, 8]
for s in self._feat_stride_fpn:
self.fpn_keys.append('stride%s' % s)
fpn_stride.append(int(s))
fpn_base_size.append(16)
self._scales = np.array([32, 16, 8, 4, 2, 1])
self._ratios = np.array([1.0] * len(self._feat_stride_fpn))
# self._anchors_fpn = dict(zip(self.fpn_keys, generate_anchors_fpn(base_size=fpn_base_size, scales=self._scales, ratios=self._ratios)))
self._anchors_fpn = dict(zip(self.fpn_keys, generate_anchors_fpn()))
self._num_anchors = dict(
zip(self.fpn_keys,
[anchors.shape[0] for anchors in self._anchors_fpn.values()]))
self._rpn_pre_nms_top_n = 1000
# self._rpn_post_nms_top_n = rpn_post_nms_top_n
# self.score_threshold = 0.05
self.nms_threshold = 0.3
self._bbox_pred = nonlinear_pred
sym, arg_params, aux_params = mx.model.load_checkpoint(prefix, epoch)
self.nms = gpu_nms_wrapper(self.nms_threshold, self.ctx_id)
self.pixel_means = np.array([103.939, 116.779, 123.68]) # BGR
self.pixel_means = config.PIXEL_MEANS
print('means', self.pixel_means)
if not test_mode:
image_size = (640, 640)
self.model = mx.mod.Module(symbol=sym,
context=self.ctx,
label_names=None)
self.model.bind(data_shapes=[('data', (1, 3, image_size[0],
image_size[1]))],
for_training=False)
self.model.set_params(arg_params, aux_params)
else:
from rcnn.core.module import MutableModule
image_size = (2400, 2400)
data_shape = [('data', (1, 3, image_size[0], image_size[1]))]
self.model = MutableModule(symbol=sym,
data_names=['data'],
label_names=None,
context=self.ctx,
max_data_shapes=data_shape)
self.model.bind(data_shape, None, for_training=False)
self.model.set_params(arg_params, aux_params)
def detect(self, img, threshold=0.05, scales=[1.0]):
proposals_list = []
scores_list = []
for im_scale in scales:
if im_scale != 1.0:
im = cv2.resize(img,
None,
None,
fx=im_scale,
fy=im_scale,
interpolation=cv2.INTER_LINEAR)
else:
im = img
im = im.astype(np.float32)
# self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
im_info = [im.shape[0], im.shape[1], im_scale]
im_tensor = np.zeros((1, 3, im.shape[0], im.shape[1]))
for i in range(3):
im_tensor[0,
i, :, :] = im[:, :, 2 - i] - self.pixel_means[2 - i]
data = nd.array(im_tensor)
db = mx.io.DataBatch(data=(data, ),
provide_data=[('data', data.shape)])
self.model.forward(db, is_train=False)
net_out = self.model.get_outputs()
pre_nms_topN = self._rpn_pre_nms_top_n
# post_nms_topN = self._rpn_post_nms_top_n
# min_size_dict = self._rpn_min_size_fpn
for s in self._feat_stride_fpn:
if len(scales) > 1 and s == 32 and im_scale == scales[-1]:
continue
_key = 'stride%s' % s
stride = int(s)
idx = 0
if s == 16:
idx = 2
elif s == 8:
idx = 4
print('getting',
im_scale,
stride,
idx,
len(net_out),
data.shape,
file=sys.stderr)
scores = net_out[idx].asnumpy()
# print(scores.shape)
idx += 1
# print('scores',stride, scores.shape, file=sys.stderr)
scores = scores[:, self._num_anchors['stride%s' % s]:, :, :]
bbox_deltas = net_out[idx].asnumpy()
# if DEBUG:
# print 'im_size: ({}, {})'.format(im_info[0], im_info[1])
# print 'scale: {}'.format(im_info[2])
_height, _width = int(im_info[0] / stride), int(im_info[1] /
stride)
height, width = bbox_deltas.shape[2], bbox_deltas.shape[3]
A = self._num_anchors['stride%s' % s]
K = height * width
anchors = anchors_plane(
height, width, stride,
self._anchors_fpn['stride%s' % s].astype(np.float32))
# print((height, width), (_height, _width), anchors.shape, bbox_deltas.shape, scores.shape, file=sys.stderr)
anchors = anchors.reshape((K * A, 4))
# print('pre', bbox_deltas.shape, height, width)
bbox_deltas = self._clip_pad(bbox_deltas, (height, width))
# print('after', bbox_deltas.shape, height, width)
bbox_deltas = bbox_deltas.transpose((0, 2, 3, 1)).reshape(
(-1, 4))
scores = self._clip_pad(scores, (height, width))
scores = scores.transpose((0, 2, 3, 1)).reshape((-1, 1))
# print(anchors.shape, bbox_deltas.shape, A, K, file=sys.stderr)
proposals = self._bbox_pred(anchors, bbox_deltas)
# proposals = anchors
proposals = clip_boxes(proposals, im_info[:2])
# keep = self._filter_boxes(proposals, min_size_dict['stride%s'%s] * im_info[2])
# proposals = proposals[keep, :]
# scores = scores[keep]
# print('333', proposals.shape)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
if pre_nms_topN > 0:
order = order[:pre_nms_topN]
proposals = proposals[order, :]
scores = scores[order]
proposals /= im_scale
proposals_list.append(proposals)
scores_list.append(scores)
proposals = np.vstack(proposals_list)
scores = np.vstack(scores_list)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
# if config.TEST.SCORE_THRESH>0.0:
# _count = np.sum(scores_ravel>config.TEST.SCORE_THRESH)
# order = order[:_count]
# if pre_nms_topN > 0:
# order = order[:pre_nms_topN]
proposals = proposals[order, :]
scores = scores[order]
det = np.hstack((proposals, scores)).astype(np.float32)
# if np.shape(det)[0] == 0:
# print("Something wrong with the input image(resolution is too low?), generate fake proposals for it.")
# proposals = np.array([[1.0, 1.0, 2.0, 2.0]]*post_nms_topN, dtype=np.float32)
# scores = np.array([[0.9]]*post_nms_topN, dtype=np.float32)
# det = np.array([[1.0, 1.0, 2.0, 2.0, 0.9]]*post_nms_topN, dtype=np.float32)
if self.nms_threshold < 1.0:
keep = self.nms(det)
det = det[keep, :]
if threshold > 0.0:
keep = np.where(det[:, 4] >= threshold)[0]
det = det[keep, :]
return det
@staticmethod
def _filter_boxes(boxes, min_size):
""" Remove all boxes with any side smaller than min_size """
ws = boxes[:, 2] - boxes[:, 0] + 1
hs = boxes[:, 3] - boxes[:, 1] + 1
keep = np.where((ws >= min_size) & (hs >= min_size))[0]
return keep
@staticmethod
def _clip_pad(tensor, pad_shape):
"""
Clip boxes of the pad area.
:param tensor: [n, c, H, W]
:param pad_shape: [h, w]
:return: [n, c, h, w]
"""
H, W = tensor.shape[2:]
h, w = pad_shape
if h < H or w < W:
tensor = tensor[:, :, :h, :w].copy()
return tensor
class SSHDetector:
def __init__(self, gpu=0, test_mode=False):
self.ctx_id = gpu
self.ctx = mx.gpu(self.ctx_id)
self.fpn_keys = []
fpn_stride = []
fpn_base_size = []
self._feat_stride_fpn = [32, 16, 8]
for s in self._feat_stride_fpn:
self.fpn_keys.append('stride%s' % s)
fpn_stride.append(int(s))
fpn_base_size.append(16)
self._scales = np.array([32, 16, 8, 4, 2, 1])
self._ratios = np.array([1.0] * len(self._feat_stride_fpn))
self._anchors_fpn = dict(
zip(self.fpn_keys, generate_anchors_fpn(base_size=fpn_base_size, scales=self._scales, ratios=self._ratios)))
self._num_anchors = dict(zip(self.fpn_keys, [anchors.shape[0] for anchors in self._anchors_fpn.values()]))
self._rpn_pre_nms_top_n = 1000
# self._rpn_post_nms_top_n = rpn_post_nms_top_n
# self.score_threshold = 0.05
self.nms_threshold = config.TEST.NMS
self._bbox_pred = nonlinear_pred
base_path = os.path.dirname(__file__)
sym, arg_params, aux_params = mx.model.load_checkpoint(base_path + '/model/e2e', 0)
self.nms = gpu_nms_wrapper(self.nms_threshold, self.ctx_id)
self.pixel_means = np.array([103.939, 116.779, 123.68]) # BGR
if not test_mode:
image_size = (640, 640)
self.model = mx.mod.Module(symbol=sym, context=self.ctx, label_names=None)
self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
self.model.set_params(arg_params, aux_params)
else:
from rcnn.core.module import MutableModule
image_size = (640, 640)
data_shape = [('data', (1, 3, image_size[0], image_size[1]))]
self.model = MutableModule(symbol=sym, data_names=['data'], label_names=None,
context=self.ctx, max_data_shapes=data_shape)
self.model.bind(data_shape, None, for_training=False)
self.model.set_params(arg_params, aux_params)
print('init ssh success')
def get_boxes(self, im, scales_index):
# prevent bigger axis from being more than max_size:
if scales_index == 0:
scales = [1.0] # 使用原始图片
elif scales_index == 1:
scales = config.TEST.PYRAMID_SCALES # 切换到pyramidbox的scale方法
else:
im_shape = im.shape
target_h = 800.
target_w = 1200.
src_h = im_shape[0] + 20 * 2
src_w = im_shape[1] + 20 * 2
im_scale = min(target_w / src_w, target_h / src_h)
if im_shape[0] < 800 and im_shape[1] < 1200:
scales = [1.0]
else:
scales = [im_scale]
return scales
def detect(self, img, scales_index=0):
proposals_list = []
scores_list = []
im_src = img.copy()
CONSTANT = config.TEST.CONSTANT
BLACK = [0, 0, 0]
img = cv2.copyMakeBorder(img, CONSTANT, CONSTANT, CONSTANT, CONSTANT, cv2.BORDER_CONSTANT, value=BLACK)
scales = self.get_boxes(img, scales_index)
for im_scale in scales:
if im_scale != 1.0:
im = cv2.resize(img, None, None, fx=im_scale, fy=im_scale, interpolation=cv2.INTER_LINEAR)
else:
im = img
im = im.astype(np.float32)
# self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
im_info = [im.shape[0], im.shape[1], im_scale]
im_tensor = np.zeros((1, 3, im.shape[0], im.shape[1]))
for i in range(3):
im_tensor[0, i, :, :] = im[:, :, 2 - i] - self.pixel_means[2 - i]
data = nd.array(im_tensor)
db = mx.io.DataBatch(data=(data,), provide_data=[('data', data.shape)])
self.model.forward(db, is_train=False)
net_out = self.model.get_outputs()
pre_nms_topN = self._rpn_pre_nms_top_n
for s in self._feat_stride_fpn:
if len(scales) > 1 and s == 32 and im_scale == scales[-1]:
continue
_key = 'stride%s' % s
stride = int(s)
idx = 0
if s == 16:
idx = 2
elif s == 8:
idx = 4
# print('getting', im_scale, stride, idx, len(net_out), data.shape, file=sys.stderr)
scores = net_out[idx].asnumpy()
# print(scores.shape)
idx += 1
# print('scores',stride, scores.shape, file=sys.stderr)
scores = scores[:, self._num_anchors['stride%s' % s]:, :, :]
bbox_deltas = net_out[idx].asnumpy()
_height, _width = int(im_info[0] / stride), int(im_info[1] / stride)
height, width = bbox_deltas.shape[2], bbox_deltas.shape[3]
A = self._num_anchors['stride%s' % s]
K = height * width
anchors = anchors_plane(height, width, stride, self._anchors_fpn['stride%s' % s].astype(np.float32))
# print((height, width), (_height, _width), anchors.shape, bbox_deltas.shape, scores.shape, file=sys.stderr)
anchors = anchors.reshape((K * A, 4))
# print('pre', bbox_deltas.shape, height, width)
bbox_deltas = self._clip_pad(bbox_deltas, (height, width))
# print('after', bbox_deltas.shape, height, width)
bbox_deltas = bbox_deltas.transpose((0, 2, 3, 1)).reshape((-1, 4))
scores = self._clip_pad(scores, (height, width))
scores = scores.transpose((0, 2, 3, 1)).reshape((-1, 1))
# print(anchors.shape, bbox_deltas.shape, A, K, file=sys.stderr)
proposals = self._bbox_pred(anchors, bbox_deltas)
# proposals = anchors
proposals = clip_boxes(proposals, im_info[:2])
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
if pre_nms_topN > 0:
order = order[:pre_nms_topN]
proposals = proposals[order, :]
scores = scores[order]
proposals /= im_scale
# #add by sai with pyramidbox to filt scale face
# if im_scale > 1:
# index = np.where(
# np.minimum(proposals[:, 2] - proposals[:, 0] + 1,
# proposals[:, 3] - proposals[:, 1] + 1) < 50)[0]
# proposals = proposals[index, :]
# scores = scores[index, :]
# else:
# index = np.where(
# np.maximum(proposals[:, 2] - proposals[:, 0] + 1,
# proposals[:, 3] - proposals[:, 1] + 1) > 20)[0]
# proposals = proposals[index, :]
# scores = scores[index, :]
proposals_list.append(proposals)
scores_list.append(scores)
proposals = np.vstack(proposals_list)
scores = np.vstack(scores_list)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
proposals = proposals[order, :]
scores = scores[order]
det = np.hstack((proposals, scores)).astype(np.float32)
if self.nms_threshold < 1.0:
keep = self.nms(det)
det = det[keep, :]
threshold = config.TEST.SCORE_THRESH
if threshold > 0.0:
keep = np.where(det[:, 4] >= threshold)[0]
det = det[keep, :]
# add by sai
if det.shape[0] != 0:
for i in range(det.shape[0]):
det[i, :][0] = det[i, :][0] - CONSTANT
det[i, :][1] = det[i, :][1] - CONSTANT
det[i, :][2] = det[i, :][2] - CONSTANT
det[i, :][3] = det[i, :][3] - CONSTANT
if det[i, :][0] < 0:
det[i, :][0] = 0
if det[i, :][2] > im_src.shape[1]:
det[i, :][2] = im_src.shape[1]
if det[i, :][1] < 0:
det[i, :][1] = 0
if det[i, :][3] > im_src.shape[0]:
det[i, :][3] = im_src.shape[0]
return det
@staticmethod
def _filter_boxes(boxes, min_size):
""" Remove all boxes with any side smaller than min_size """
ws = boxes[:, 2] - boxes[:, 0] + 1
hs = boxes[:, 3] - boxes[:, 1] + 1
keep = np.where((ws >= min_size) & (hs >= min_size))[0]
return keep
@staticmethod
def _clip_pad(tensor, pad_shape):
"""
Clip boxes of the pad area.
:param tensor: [n, c, H, W]
:param pad_shape: [h, w]
:return: [n, c, h, w]
"""
H, W = tensor.shape[2:]
h, w = pad_shape
if h < H or w < W:
tensor = tensor[:, :, :h, :w].copy()
return tensor
class SSHDetector:
def __init__(self, prefix, epoch, ctx_id=1, test_mode=False):
self.ctx_id = ctx_id
self.ctx = mx.gpu(self.ctx_id)
self.keys = []
strides = []
base_size = []
scales = []
self.feat_strides = config.RPN_FEAT_STRIDE
for s in self.feat_strides:
self.keys.append('stride%s' % s)
strides.append(int(s))
base_size.append(config.RPN_ANCHOR_CFG[str(s)]['BASE_SIZE'])
scales += config.RPN_ANCHOR_CFG[str(s)]['SCALES']
# self._scales = np.array([32, 16, 8, 4, 2, 1])
self._scales = np.array(scales)
self._ratios = np.array([1.0]*len(self.feat_strides))
# self._anchors_fpn = dict(list(zip(self.keys, generate_anchors_fpn())))
self._anchors_fpn = dict(list(zip(self.keys, generate_anchors_fpn(base_size=base_size, scales=self._scales, ratios=self._ratios))))
self._num_anchors = dict(zip(self.keys, [anchors.shape[0] for anchors in self._anchors_fpn.values()]))
self._rpn_pre_nms_top_n = 1000
#self._rpn_post_nms_top_n = rpn_post_nms_top_n
self.nms_threshold = config.test_nms_threshold #值越大，同一个人脸产生的预测框越多
self._bbox_pred = nonlinear_pred
sym, arg_params, aux_params = mx.model.load_checkpoint(prefix, epoch)
self.nms = gpu_nms_wrapper(self.nms_threshold, self.ctx_id)
self.pixel_means = np.array([103.939, 116.779, 123.68]) #BGR
self.pixel_means = np.array([127., 127., 127.])
if not test_mode:
image_size = (640, 640)
self.model = mx.mod.Module(symbol=sym, context=self.ctx, label_names=None)
self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
self.model.set_params(arg_params, aux_params)
else:
from rcnn.core.module import MutableModule
image_size = (2400, 2400)
data_shape = [('data', (1, 3, image_size[0], image_size[1]))]
self.model = MutableModule(symbol=sym, data_names=['data'], label_names=None,
context=self.ctx, max_data_shapes=data_shape)
self.model.bind(data_shape, None, for_training=False)
self.model.set_params(arg_params, aux_params)
def detect(self, img, threshold=0.5, scales=[1.0]):
proposals_list = []
proposals_kp_list = []
scores_list = []
for im_scale in scales:
if im_scale != 1.0:
im = cv2.resize(img, None, None, fx=im_scale, fy=im_scale, interpolation=cv2.INTER_LINEAR)
else:
im = img
im = im.astype(np.float32)
# im_shape = im.shape
# self.model.bind(data_shapes=[('data', (1, 3, im_shape[0], im_shape[1]))], for_training=False)
im_info = [im.shape[0], im.shape[1], im_scale]
im_tensor = np.zeros((1, 3, im.shape[0], im.shape[1]))
for i in range(3):
im_tensor[0, i, :, :] = im[:, :, 2 - i] - self.pixel_means[2 - i] #bgr2rgb mxnet rgb opencv bgr
data = nd.array(im_tensor)
db = mx.io.DataBatch(data=(data,), provide_data=[('data', data.shape)])
timea = datetime.datetime.now()
self.model.forward(db, is_train=False)
timeb = datetime.datetime.now()
diff = timeb - timea
print('forward uses', diff.total_seconds(), 'seconds')
net_out = self.model.get_outputs() #网络的输出为len=9的list,针对三个不同的stride,分为三大块的list,其中每个list分别代表score,bbox,kpoint三个维度的结果，
pre_nms_topN = self._rpn_pre_nms_top_n
#post_nms_topN = self._rpn_post_nms_top_n
#min_size_dict = self._rpn_min_size_fpn
for s in self.feat_strides:
_key = 'stride%s' % s
# print(_key)
stride = int(s)
if s == self.feat_strides[0]:
idx = 0
if s == self.feat_strides[1]:
idx = 3
elif s == self.feat_strides[2]:
idx = 6
# print('getting', im_scale, stride, idx, len(net_out), data.shape, file=sys.stderr)
scores = net_out[idx].asnumpy() #获取每个stride下的分类得分
idx += 1
# print('scores',stride, scores.shape, file=sys.stderr)
scores = scores[:, self._num_anchors['stride%s'%s]:, :, :] #去掉了其中lable的值？？？
bbox_deltas = net_out[idx].asnumpy()
idx += 1
_height, _width = int(im_info[0] / stride), int(im_info[1] / stride)
height, width = bbox_deltas.shape[2], bbox_deltas.shape[3]
# kpoint
kpoint_deltas = net_out[idx].asnumpy()
A = self._num_anchors['stride%s' % s]
K = height * width
anchors = anchors_plane(height, width, stride, self._anchors_fpn['stride%s' % s].astype(np.float32)) #RP映射回原图中的坐标位置
# print((height, width), (_height, _width), anchors.shape, bbox_deltas.shape, scores.shape, file=sys.stderr)
anchors = anchors.reshape((K * A, 4))
# print('predict bbox_deltas', bbox_deltas.shape, height, width)
bbox_deltas = self._clip_pad(bbox_deltas, (height, width))
# print('after clip pad', bbox_deltas.shape, height, width)
bbox_deltas = bbox_deltas.transpose((0, 2, 3, 1)).reshape((-1, 4))
kpoint_deltas = self._clip_pad(kpoint_deltas, (height, width))
kpoint_deltas = kpoint_deltas.transpose((0, 2, 3, 1)).reshape((-1, 10))
scores = self._clip_pad(scores, (height, width))
scores = scores.transpose((0, 2, 3, 1)).reshape((-1, 1))
# print(anchors.shape, bbox_deltas.shape, A, K, file=sys.stderr)
proposals = self._bbox_pred(anchors, bbox_deltas)
proposals = clip_boxes(proposals, im_info[:2]) #将超出图像的坐标去除掉
proposals_kp = kpoint_pred(anchors, kpoint_deltas)
proposals_kp = clip_points(proposals_kp, im_info[:2])
#取出score的top N
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
if pre_nms_topN > 0:
order = order[:pre_nms_topN]
proposals = proposals[order, :]
proposals_kp = proposals_kp[order, :]
scores = scores[order]
proposals /= im_scale
proposals_kp /= im_scale
proposals_list.append(proposals)
proposals_kp_list.append(proposals_kp)
scores_list.append(scores)
proposals = np.vstack(proposals_list)
proposals_kp = np.vstack(proposals_kp_list)
scores = np.vstack(scores_list)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
#if config.TEST.SCORE_THRESH>0.0:
# _count = np.sum(scores_ravel>config.TEST.SCORE_THRESH)
# order = order[:_count]
#if pre_nms_topN > 0:
# order = order[:pre_nms_topN]
proposals = proposals[order, :]
proposals_kp = proposals_kp[order, :]
scores = scores[order]
det = np.hstack((proposals, scores, proposals_kp)).astype(np.float32)
#if np.shape(det)[0] == 0:
# print("Something wrong with the input image(resolution is too low?), generate fake proposals for it.")
# proposals = np.array([[1.0, 1.0, 2.0, 2.0]]*post_nms_topN, dtype=np.float32)
# scores = np.array([[0.9]]*post_nms_topN, dtype=np.float32)
# det = np.array([[1.0, 1.0, 2.0, 2.0, 0.9]]*post_nms_topN, dtype=np.float32)
if self.nms_threshold < 1.0:
keep = self.nms(det)
det = det[keep, :]
if threshold > 0.0:
keep = np.where(det[:, 4] >= threshold)[0]
det = det[keep, :]
return det
@staticmethod
def _filter_boxes(boxes, min_size):
""" Remove all boxes with any side smaller than min_size """
ws = boxes[:, 2] - boxes[:, 0] + 1
hs = boxes[:, 3] - boxes[:, 1] + 1
keep = np.where((ws >= min_size) & (hs >= min_size))[0]
return keep
@staticmethod
def _clip_pad(tensor, pad_shape):
"""
Clip boxes of the pad area.
:param tensor: [n, c, H, W]
:param pad_shape: [h, w]
:return: [n, c, h, w]
"""
H, W = tensor.shape[2:]
h, w = pad_shape
if h < H or w < W:
tensor = tensor[:, :, :h, :w].copy()
return tensor
class SSHDetector:
def __init__(self, prefix, epoch, ctx_id=0, test_mode=False):
self.ctx_id = ctx_id
self.ctx = mx.gpu(self.ctx_id)
self.fpn_keys = []
fpn_stride = []
fpn_base_size = []
self._feat_stride_fpn = [32, 16, 8]
for s in self._feat_stride_fpn:
self.fpn_keys.append('stride%s'%s)
fpn_stride.append(int(s))
fpn_base_size.append(16)
self._scales = np.array([32,16,8,4,2,1])
self._ratios = np.array([1.0]*len(self._feat_stride_fpn))
self._anchors_fpn = dict(zip(self.fpn_keys, generate_anchors_fpn(base_size=fpn_base_size, scales=self._scales, ratios=self._ratios)))
self._num_anchors = dict(zip(self.fpn_keys, [anchors.shape[0] for anchors in self._anchors_fpn.values()]))
self._rpn_pre_nms_top_n = 1000
#self._rpn_post_nms_top_n = rpn_post_nms_top_n
#self.score_threshold = 0.05
self.nms_threshold = 0.3
self._bbox_pred = nonlinear_pred
sym, arg_params, aux_params = mx.model.load_checkpoint(prefix, epoch)
self.nms = gpu_nms_wrapper(self.nms_threshold, self.ctx_id)
self.pixel_means = np.array([103.939, 116.779, 123.68]) #BGR
if not test_mode:
image_size = (640, 640)
self.model = mx.mod.Module(symbol=sym, context=self.ctx, label_names = None)
self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
self.model.set_params(arg_params, aux_params)
else:
from rcnn.core.module import MutableModule
image_size = (2400, 2400)
data_shape = [('data', (1,3,image_size[0], image_size[1]))]
self.model = MutableModule(symbol=sym, data_names=['data'], label_names=None,
context=self.ctx, max_data_shapes=data_shape)
self.model.bind(data_shape, None, for_training=False)
self.model.set_params(arg_params, aux_params)
def detect(self, img, threshold=0.05, scales=[1.0]):
proposals_list = []
scores_list = []
for im_scale in scales:
if im_scale!=1.0:
im = cv2.resize(img, None, None, fx=im_scale, fy=im_scale, interpolation=cv2.INTER_LINEAR)
else:
im = img
im = im.astype(np.float32)
#self.model.bind(data_shapes=[('data', (1, 3, image_size[0], image_size[1]))], for_training=False)
im_info = [im.shape[0], im.shape[1], im_scale]
im_tensor = np.zeros((1, 3, im.shape[0], im.shape[1]))
for i in range(3):
im_tensor[0, i, :, :] = im[:, :, 2 - i] - self.pixel_means[2 - i]
data = nd.array(im_tensor)
db = mx.io.DataBatch(data=(data,), provide_data=[('data', data.shape)])
self.model.forward(db, is_train=False)
net_out = self.model.get_outputs()
pre_nms_topN = self._rpn_pre_nms_top_n
#post_nms_topN = self._rpn_post_nms_top_n
#min_size_dict = self._rpn_min_size_fpn
for s in self._feat_stride_fpn:
if len(scales)>1 and s==32 and im_scale==scales[-1]:
continue
_key = 'stride%s'%s
stride = int(s)
idx = 0
if s==16:
idx=2
elif s==8:
idx=4
print('getting', im_scale, stride, idx, len(net_out), data.shape, file=sys.stderr)
scores = net_out[idx].asnumpy()
#print(scores.shape)
idx+=1
#print('scores',stride, scores.shape, file=sys.stderr)
scores = scores[:, self._num_anchors['stride%s'%s]:, :, :]
bbox_deltas = net_out[idx].asnumpy()
#if DEBUG:
# print 'im_size: ({}, {})'.format(im_info[0], im_info[1])
# print 'scale: {}'.format(im_info[2])
_height, _width = int(im_info[0] / stride), int(im_info[1] / stride)
height, width = bbox_deltas.shape[2], bbox_deltas.shape[3]
A = self._num_anchors['stride%s'%s]
K = height * width
anchors = anchors_plane(height, width, stride, self._anchors_fpn['stride%s'%s].astype(np.float32))
#print((height, width), (_height, _width), anchors.shape, bbox_deltas.shape, scores.shape, file=sys.stderr)
anchors = anchors.reshape((K * A, 4))
#print('pre', bbox_deltas.shape, height, width)
bbox_deltas = self._clip_pad(bbox_deltas, (height, width))
#print('after', bbox_deltas.shape, height, width)
bbox_deltas = bbox_deltas.transpose((0, 2, 3, 1)).reshape((-1, 4))
scores = self._clip_pad(scores, (height, width))
scores = scores.transpose((0, 2, 3, 1)).reshape((-1, 1))
#print(anchors.shape, bbox_deltas.shape, A, K, file=sys.stderr)
proposals = self._bbox_pred(anchors, bbox_deltas)
#proposals = anchors
proposals = clip_boxes(proposals, im_info[:2])
#keep = self._filter_boxes(proposals, min_size_dict['stride%s'%s] * im_info[2])
#proposals = proposals[keep, :]
#scores = scores[keep]
#print('333', proposals.shape)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
if pre_nms_topN > 0:
order = order[:pre_nms_topN]
proposals = proposals[order, :]
scores = scores[order]
proposals /= im_scale
proposals_list.append(proposals)
scores_list.append(scores)
proposals = np.vstack(proposals_list)
scores = np.vstack(scores_list)
scores_ravel = scores.ravel()
order = scores_ravel.argsort()[::-1]
#if config.TEST.SCORE_THRESH>0.0:
# _count = np.sum(scores_ravel>config.TEST.SCORE_THRESH)
# order = order[:_count]
#if pre_nms_topN > 0:
# order = order[:pre_nms_topN]
proposals = proposals[order, :]
scores = scores[order]
det = np.hstack((proposals, scores)).astype(np.float32)
#if np.shape(det)[0] == 0:
# print("Something wrong with the input image(resolution is too low?), generate fake proposals for it.")
# proposals = np.array([[1.0, 1.0, 2.0, 2.0]]*post_nms_topN, dtype=np.float32)
# scores = np.array([[0.9]]*post_nms_topN, dtype=np.float32)
# det = np.array([[1.0, 1.0, 2.0, 2.0, 0.9]]*post_nms_topN, dtype=np.float32)
if self.nms_threshold<1.0:
keep = self.nms(det)
det = det[keep, :]
if threshold>0.0:
keep = np.where(det[:, 4] >= threshold)[0]
det = det[keep, :]
return det
@staticmethod
def _filter_boxes(boxes, min_size):
""" Remove all boxes with any side smaller than min_size """
ws = boxes[:, 2] - boxes[:, 0] + 1
hs = boxes[:, 3] - boxes[:, 1] + 1
keep = np.where((ws >= min_size) & (hs >= min_size))[0]
return keep
@staticmethod
def _clip_pad(tensor, pad_shape):
"""
Clip boxes of the pad area.
:param tensor: [n, c, H, W]
:param pad_shape: [h, w]
:return: [n, c, h, w]
"""
H, W = tensor.shape[2:]
h, w = pad_shape
if h < H or w < W:
tensor = tensor[:, :, :h, :w].copy()
return tensor
