未验证 提交 882ad395 编写于 作者: Z zhoujun 提交者: GitHub

Merge pull request #1146 from WenmuZhou/dygraph_rc

add tps mdule
......@@ -72,7 +72,7 @@ Train:
- KeepKeys:
keep_keys: ['image', 'label', 'length'] # dataloader will return list in this order
loader:
shuffle: True
shuffle: False
batch_size_per_card: 256
drop_last: True
num_workers: 8
......
Global:
use_gpu: true
epoch_num: 72
log_smooth_window: 20
print_batch_step: 10
save_model_dir: ./output/rec/r34_vd_tps_bilstm_ctc/
save_epoch_step: 3
# evaluation is run every 5000 iterations after the 4000th iteration
eval_batch_step: [0, 2000]
# if pretrained_model is saved in static mode, load_static_weights must set to True
cal_metric_during_train: True
pretrained_model:
checkpoints:
save_inference_dir:
use_visualdl: False
infer_img: doc/imgs_words/ch/word_1.jpg
# for data or label process
character_dict_path:
character_type: en
max_text_length: 25
infer_mode: False
use_space_char: False
Optimizer:
name: Adam
beta1: 0.9
beta2: 0.999
lr:
learning_rate: 0.0005
regularizer:
name: 'L2'
factor: 0
Architecture:
model_type: rec
algorithm: CRNN
Transform:
name: TPS
num_fiducial: 20
loc_lr: 0.1
model_name: small
Backbone:
name: ResNet
layers: 34
Neck:
name: SequenceEncoder
encoder_type: rnn
hidden_size: 256
Head:
name: CTCHead
fc_decay: 0
Loss:
name: CTCLoss
PostProcess:
name: CTCLabelDecode
Metric:
name: RecMetric
main_indicator: acc
Train:
dataset:
name: LMDBDateSet
data_dir: ./train_data/data_lmdb_release/training/
transforms:
- DecodeImage: # load image
img_mode: BGR
channel_first: False
- CTCLabelEncode: # Class handling label
- RecResizeImg:
image_shape: [3, 32, 100]
- KeepKeys:
keep_keys: ['image', 'label', 'length'] # dataloader will return list in this order
loader:
shuffle: True
batch_size_per_card: 256
drop_last: True
num_workers: 8
Eval:
dataset:
name: LMDBDateSet
data_dir: ./train_data/data_lmdb_release/validation/
transforms:
- DecodeImage: # load image
img_mode: BGR
channel_first: False
- CTCLabelEncode: # Class handling label
- RecResizeImg:
image_shape: [3, 32, 100]
- KeepKeys:
keep_keys: ['image', 'label', 'length'] # dataloader will return list in this order
loader:
shuffle: False
drop_last: False
batch_size_per_card: 256
num_workers: 4
......@@ -16,13 +16,14 @@ from __future__ import division
from __future__ import print_function
from paddle import nn
from ppocr.modeling.transform import build_transform
from ppocr.modeling.backbones import build_backbone
from ppocr.modeling.necks import build_neck
from ppocr.modeling.heads import build_head
__all__ = ['BaseModel']
class BaseModel(nn.Layer):
def __init__(self, config):
"""
......
......@@ -28,8 +28,9 @@ class Im2Seq(nn.Layer):
def forward(self, x):
B, C, H, W = x.shape
x = x.reshape((B, -1, W))
x = x.transpose((0, 2, 1)) # (NTC)(batch, width, channels)
assert H == 1
x = x.squeeze(axis=2)
x = x.transpose([0, 2, 1]) # (NTC)(batch, width, channels)
return x
......@@ -76,7 +77,8 @@ class SequenceEncoder(nn.Layer):
'fc': EncoderWithFC,
'rnn': EncoderWithRNN
}
assert encoder_type in support_encoder_dict, '{} must in {}'.format(encoder_type, support_encoder_dict.keys())
assert encoder_type in support_encoder_dict, '{} must in {}'.format(
encoder_type, support_encoder_dict.keys())
self.encoder = support_encoder_dict[encoder_type](
self.encoder_reshape.out_channels, hidden_size)
......
......@@ -16,7 +16,9 @@ __all__ = ['build_transform']
def build_transform(config):
support_dict = ['']
from .tps import TPS
support_dict = ['TPS']
module_name = config.pop('name')
assert module_name in support_dict, Exception(
......
# copyright (c) 2020 PaddlePaddle Authors. All Rights Reserve.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import paddle
from paddle import nn, ParamAttr
from paddle.nn import functional as F
import numpy as np
class ConvBNLayer(nn.Layer):
def __init__(self,
in_channels,
out_channels,
kernel_size,
stride=1,
groups=1,
act=None,
name=None):
super(ConvBNLayer, self).__init__()
self.conv = nn.Conv2D(
in_channels=in_channels,
out_channels=out_channels,
kernel_size=kernel_size,
stride=stride,
padding=(kernel_size - 1) // 2,
groups=groups,
weight_attr=ParamAttr(name=name + "_weights"),
bias_attr=False)
bn_name = "bn_" + name
self.bn = nn.BatchNorm(
out_channels,
act=act,
param_attr=ParamAttr(name=bn_name + '_scale'),
bias_attr=ParamAttr(bn_name + '_offset'),
moving_mean_name=bn_name + '_mean',
moving_variance_name=bn_name + '_variance')
def forward(self, x):
x = self.conv(x)
x = self.bn(x)
return x
class LocalizationNetwork(nn.Layer):
def __init__(self, in_channels, num_fiducial, loc_lr, model_name):
super(LocalizationNetwork, self).__init__()
self.F = num_fiducial
F = num_fiducial
if model_name == "large":
num_filters_list = [64, 128, 256, 512]
fc_dim = 256
else:
num_filters_list = [16, 32, 64, 128]
fc_dim = 64
self.block_list = []
for fno in range(0, len(num_filters_list)):
num_filters = num_filters_list[fno]
name = "loc_conv%d" % fno
conv = self.add_sublayer(
name,
ConvBNLayer(
in_channels=in_channels,
out_channels=num_filters,
kernel_size=3,
act='relu',
name=name))
self.block_list.append(conv)
if fno == len(num_filters_list) - 1:
pool = nn.AdaptiveAvgPool2D(1)
else:
pool = nn.MaxPool2D(kernel_size=2, stride=2, padding=0)
in_channels = num_filters
self.block_list.append(pool)
name = "loc_fc1"
self.fc1 = nn.Linear(
in_channels,
fc_dim,
weight_attr=ParamAttr(
learning_rate=loc_lr, name=name + "_w"),
bias_attr=ParamAttr(name=name + '.b_0'),
name=name)
# Init fc2 in LocalizationNetwork
initial_bias = self.get_initial_fiducials()
initial_bias = initial_bias.reshape(-1)
name = "loc_fc2"
param_attr = ParamAttr(
learning_rate=loc_lr,
initializer=nn.initializer.Assign(np.zeros([fc_dim, F * 2])),
name=name + "_w")
bias_attr = ParamAttr(
learning_rate=loc_lr,
initializer=nn.initializer.Assign(initial_bias),
name=name + "_b")
self.fc2 = nn.Linear(
fc_dim,
F * 2,
weight_attr=param_attr,
bias_attr=bias_attr,
name=name)
self.out_channels = F * 2
def forward(self, x):
"""
Estimating parameters of geometric transformation
Args:
image: input
Return:
batch_C_prime: the matrix of the geometric transformation
"""
B = x.shape[0]
i = 0
for block in self.block_list:
x = block(x)
x = x.reshape([B, -1])
x = self.fc1(x)
x = F.relu(x)
x = self.fc2(x)
x = x.reshape(shape=[-1, self.F, 2])
return x
def get_initial_fiducials(self):
""" see RARE paper Fig. 6 (a) """
F = self.F
ctrl_pts_x = np.linspace(-1.0, 1.0, int(F / 2))
ctrl_pts_y_top = np.linspace(0.0, -1.0, num=int(F / 2))
ctrl_pts_y_bottom = np.linspace(1.0, 0.0, num=int(F / 2))
ctrl_pts_top = np.stack([ctrl_pts_x, ctrl_pts_y_top], axis=1)
ctrl_pts_bottom = np.stack([ctrl_pts_x, ctrl_pts_y_bottom], axis=1)
initial_bias = np.concatenate([ctrl_pts_top, ctrl_pts_bottom], axis=0)
return initial_bias
class GridGenerator(nn.Layer):
def __init__(self, in_channels, num_fiducial):
super(GridGenerator, self).__init__()
self.eps = 1e-6
self.F = num_fiducial
name = "ex_fc"
initializer = nn.initializer.Constant(value=0.0)
param_attr = ParamAttr(
learning_rate=0.0, initializer=initializer, name=name + "_w")
bias_attr = ParamAttr(
learning_rate=0.0, initializer=initializer, name=name + "_b")
self.fc = nn.Linear(
in_channels,
6,
weight_attr=param_attr,
bias_attr=bias_attr,
name=name)
def forward(self, batch_C_prime, I_r_size):
"""
Generate the grid for the grid_sampler.
Args:
batch_C_prime: the matrix of the geometric transformation
I_r_size: the shape of the input image
Return:
batch_P_prime: the grid for the grid_sampler
"""
C = self.build_C()
P = self.build_P(I_r_size)
inv_delta_C = self.build_inv_delta_C(C).astype('float32')
P_hat = self.build_P_hat(C, P).astype('float32')
inv_delta_C_tensor = paddle.to_tensor(inv_delta_C)
inv_delta_C_tensor.stop_gradient = True
P_hat_tensor = paddle.to_tensor(P_hat)
P_hat_tensor.stop_gradient = True
batch_C_ex_part_tensor = self.get_expand_tensor(batch_C_prime)
batch_C_ex_part_tensor.stop_gradient = True
batch_C_prime_with_zeros = paddle.concat(
[batch_C_prime, batch_C_ex_part_tensor], axis=1)
batch_T = paddle.matmul(inv_delta_C_tensor, batch_C_prime_with_zeros)
batch_P_prime = paddle.matmul(P_hat_tensor, batch_T)
return batch_P_prime
def build_C(self):
""" Return coordinates of fiducial points in I_r; C """
F = self.F
ctrl_pts_x = np.linspace(-1.0, 1.0, int(F / 2))
ctrl_pts_y_top = -1 * np.ones(int(F / 2))
ctrl_pts_y_bottom = np.ones(int(F / 2))
ctrl_pts_top = np.stack([ctrl_pts_x, ctrl_pts_y_top], axis=1)
ctrl_pts_bottom = np.stack([ctrl_pts_x, ctrl_pts_y_bottom], axis=1)
C = np.concatenate([ctrl_pts_top, ctrl_pts_bottom], axis=0)
return C # F x 2
def build_P(self, I_r_size):
I_r_width, I_r_height = I_r_size
I_r_grid_x = (np.arange(-I_r_width, I_r_width, 2) + 1.0) \
/ I_r_width # self.I_r_width
I_r_grid_y = (np.arange(-I_r_height, I_r_height, 2) + 1.0) \
/ I_r_height # self.I_r_height
# P: self.I_r_width x self.I_r_height x 2
P = np.stack(np.meshgrid(I_r_grid_x, I_r_grid_y), axis=2)
# n (= self.I_r_width x self.I_r_height) x 2
return P.reshape([-1, 2])
def build_inv_delta_C(self, C):
""" Return inv_delta_C which is needed to calculate T """
F = self.F
hat_C = np.zeros((F, F), dtype=float) # F x F
for i in range(0, F):
for j in range(i, F):
r = np.linalg.norm(C[i] - C[j])
hat_C[i, j] = r
hat_C[j, i] = r
np.fill_diagonal(hat_C, 1)
hat_C = (hat_C**2) * np.log(hat_C)
# print(C.shape, hat_C.shape)
delta_C = np.concatenate( # F+3 x F+3
[
np.concatenate(
[np.ones((F, 1)), C, hat_C], axis=1), # F x F+3
np.concatenate(
[np.zeros((2, 3)), np.transpose(C)], axis=1), # 2 x F+3
np.concatenate(
[np.zeros((1, 3)), np.ones((1, F))], axis=1) # 1 x F+3
],
axis=0)
inv_delta_C = np.linalg.inv(delta_C)
return inv_delta_C # F+3 x F+3
def build_P_hat(self, C, P):
F = self.F
eps = self.eps
n = P.shape[0] # n (= self.I_r_width x self.I_r_height)
# P_tile: n x 2 -> n x 1 x 2 -> n x F x 2
P_tile = np.tile(np.expand_dims(P, axis=1), (1, F, 1))
C_tile = np.expand_dims(C, axis=0) # 1 x F x 2
P_diff = P_tile - C_tile # n x F x 2
# rbf_norm: n x F
rbf_norm = np.linalg.norm(P_diff, ord=2, axis=2, keepdims=False)
# rbf: n x F
rbf = np.multiply(np.square(rbf_norm), np.log(rbf_norm + eps))
P_hat = np.concatenate([np.ones((n, 1)), P, rbf], axis=1)
return P_hat # n x F+3
def get_expand_tensor(self, batch_C_prime):
B = batch_C_prime.shape[0]
batch_C_prime = batch_C_prime.reshape([B, -1])
batch_C_ex_part_tensor = self.fc(batch_C_prime)
batch_C_ex_part_tensor = batch_C_ex_part_tensor.reshape([-1, 3, 2])
return batch_C_ex_part_tensor
class TPS(nn.Layer):
def __init__(self, in_channels, num_fiducial, loc_lr, model_name):
super(TPS, self).__init__()
self.loc_net = LocalizationNetwork(in_channels, num_fiducial, loc_lr,
model_name)
self.grid_generator = GridGenerator(self.loc_net.out_channels,
num_fiducial)
self.out_channels = in_channels
def forward(self, image):
image.stop_gradient = False
I_r_size = [image.shape[3], image.shape[2]]
batch_C_prime = self.loc_net(image)
batch_P_prime = self.grid_generator(batch_C_prime, I_r_size)
batch_P_prime = batch_P_prime.reshape(
[-1, image.shape[2], image.shape[3], 2])
batch_I_r = F.grid_sample(x=image, grid=batch_P_prime)
return batch_I_r
import cv2
import paddle
import numpy as np
import pyclipper
from shapely.geometry import Polygon
class DBPostProcess():
def __init__(self,
thresh=0.3,
box_thresh=0.7,
max_candidates=1000,
unclip_ratio=1.5):
self.min_size = 3
self.thresh = thresh
self.box_thresh = box_thresh
self.max_candidates = max_candidates
self.unclip_ratio = unclip_ratio
def __call__(self, pred, shape_list, is_output_polygon=False):
'''
batch: (image, polygons, ignore_tags
h_w_list: 包含[h,w]的数组
pred:
binary: text region segmentation map, with shape (N, 1,H, W)
'''
if isinstance(pred, paddle.Tensor):
pred = pred.numpy()
pred = pred[:, 0, :, :]
segmentation = self.binarize(pred)
batch_out = []
for batch_index in range(pred.shape[0]):
height, width = shape_list[batch_index]
boxes, scores = self.post_p(
pred[batch_index],
segmentation[batch_index],
width,
height,
is_output_polygon=is_output_polygon)
batch_out.append({"points": boxes})
return batch_out
def binarize(self, pred):
return pred > self.thresh
def post_p(self,
pred,
bitmap,
dest_width,
dest_height,
is_output_polygon=True):
'''
_bitmap: single map with shape (H, W),
whose values are binarized as {0, 1}
'''
height, width = pred.shape
boxes = []
new_scores = []
contours, _ = cv2.findContours((bitmap * 255).astype(np.uint8),
cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)
for contour in contours[:self.max_candidates]:
epsilon = 0.005 * cv2.arcLength(contour, True)
approx = cv2.approxPolyDP(contour, epsilon, True)
points = approx.reshape((-1, 2))
if points.shape[0] < 4:
continue
score = self.box_score_fast(pred, points.reshape(-1, 2))
if self.box_thresh > score:
continue
if points.shape[0] > 2:
box = self.unclip(points, unclip_ratio=self.unclip_ratio)
if len(box) > 1 or len(box) == 0:
continue
else:
continue
four_point_box, sside = self.get_mini_boxes(box.reshape((-1, 1, 2)))
if sside < self.min_size + 2:
continue
if not is_output_polygon:
box = np.array(four_point_box)
else:
box = box.reshape(-1, 2)
box[:, 0] = np.clip(
np.round(box[:, 0] / width * dest_width), 0, dest_width)
box[:, 1] = np.clip(
np.round(box[:, 1] / height * dest_height), 0, dest_height)
boxes.append(box)
new_scores.append(score)
return boxes, new_scores
def unclip(self, box, unclip_ratio=1.5):
poly = Polygon(box)
distance = poly.area * unclip_ratio / poly.length
offset = pyclipper.PyclipperOffset()
offset.AddPath(box, pyclipper.JT_ROUND, pyclipper.ET_CLOSEDPOLYGON)
expanded = np.array(offset.Execute(distance))
return expanded
def get_mini_boxes(self, contour):
bounding_box = cv2.minAreaRect(contour)
points = sorted(list(cv2.boxPoints(bounding_box)), key=lambda x: x[0])
index_1, index_2, index_3, index_4 = 0, 1, 2, 3
if points[1][1] > points[0][1]:
index_1 = 0
index_4 = 1
else:
index_1 = 1
index_4 = 0
if points[3][1] > points[2][1]:
index_2 = 2
index_3 = 3
else:
index_2 = 3
index_3 = 2
box = [
points[index_1], points[index_2], points[index_3], points[index_4]
]
return box, min(bounding_box[1])
def box_score_fast(self, bitmap, _box):
h, w = bitmap.shape[:2]
box = _box.copy()
xmin = np.clip(np.floor(box[:, 0].min()).astype(np.int), 0, w - 1)
xmax = np.clip(np.ceil(box[:, 0].max()).astype(np.int), 0, w - 1)
ymin = np.clip(np.floor(box[:, 1].min()).astype(np.int), 0, h - 1)
ymax = np.clip(np.ceil(box[:, 1].max()).astype(np.int), 0, h - 1)
mask = np.zeros((ymax - ymin + 1, xmax - xmin + 1), dtype=np.uint8)
box[:, 0] = box[:, 0] - xmin
box[:, 1] = box[:, 1] - ymin
cv2.fillPoly(mask, box.reshape(1, -1, 2).astype(np.int32), 1)
return cv2.mean(bitmap[ymin:ymax + 1, xmin:xmax + 1], mask)[0]
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