# Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved. # # 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 from paddle import fluid from ppocr.utils.utility import create_module from ppocr.utils.utility import initial_logger logger = initial_logger() from copy import deepcopy class RecModel(object): """ Rec model architecture Args: params(object): Params from yaml file and settings from command line """ def __init__(self, params): super(RecModel, self).__init__() global_params = params['Global'] char_num = global_params['char_ops'].get_char_num() global_params['char_num'] = char_num self.char_type = global_params['character_type'] self.infer_img = global_params['infer_img'] if "TPS" in params: tps_params = deepcopy(params["TPS"]) tps_params.update(global_params) self.tps = create_module(tps_params['function'])\ (params=tps_params) else: self.tps = None backbone_params = deepcopy(params["Backbone"]) backbone_params.update(global_params) self.backbone = create_module(backbone_params['function'])\ (params=backbone_params) head_params = deepcopy(params["Head"]) head_params.update(global_params) self.head = create_module(head_params['function'])\ (params=head_params) loss_params = deepcopy(params["Loss"]) loss_params.update(global_params) self.loss = create_module(loss_params['function'])\ (params=loss_params) self.loss_type = global_params['loss_type'] self.image_shape = global_params['image_shape'] self.max_text_length = global_params['max_text_length'] if "num_heads" in global_params: self.num_heads = global_params["num_heads"] else: self.num_heads = None def create_feed(self, mode): """ Create feed dict and DataLoader object Args: mode(str): runtime mode, can be "train", "eval" or "test" Return: image, labels, loader """ image_shape = deepcopy(self.image_shape) image_shape.insert(0, -1) if mode == "train": image = fluid.data(name='image', shape=image_shape, dtype='float32') image.stop_gradient = False if self.loss_type == "attention": label_in = fluid.data( name='label_in', shape=[None, 1], dtype='int32', lod_level=1) label_out = fluid.data( name='label_out', shape=[None, 1], dtype='int32', lod_level=1) feed_list = [image, label_in, label_out] labels = {'label_in': label_in, 'label_out': label_out} elif self.loss_type == "srn": encoder_word_pos = fluid.data( name="encoder_word_pos", shape=[ -1, int((image_shape[-2] / 8) * (image_shape[-1] / 8)), 1 ], dtype="int64") gsrm_word_pos = fluid.data( name="gsrm_word_pos", shape=[-1, self.max_text_length, 1], dtype="int64") gsrm_slf_attn_bias1 = fluid.data( name="gsrm_slf_attn_bias1", shape=[ -1, self.num_heads, self.max_text_length, self.max_text_length ], dtype="float32") gsrm_slf_attn_bias2 = fluid.data( name="gsrm_slf_attn_bias2", shape=[ -1, self.num_heads, self.max_text_length, self.max_text_length ], dtype="float32") lbl_weight = fluid.layers.data( name="lbl_weight", shape=[-1, 1], dtype='int64') label = fluid.data( name='label', shape=[-1, 1], dtype='int32', lod_level=1) feed_list = [ image, label, encoder_word_pos, gsrm_word_pos, gsrm_slf_attn_bias1, gsrm_slf_attn_bias2, lbl_weight ] labels = { 'label': label, 'encoder_word_pos': encoder_word_pos, 'gsrm_word_pos': gsrm_word_pos, 'gsrm_slf_attn_bias1': gsrm_slf_attn_bias1, 'gsrm_slf_attn_bias2': gsrm_slf_attn_bias2, 'lbl_weight': lbl_weight } else: label = fluid.data( name='label', shape=[None, 1], dtype='int32', lod_level=1) feed_list = [image, label] labels = {'label': label} loader = fluid.io.DataLoader.from_generator( feed_list=feed_list, capacity=64, use_double_buffer=True, iterable=False) else: labels = None loader = None if self.char_type == "ch" and self.infer_img and self.loss_type != "srn": image_shape[-1] = -1 if self.tps != None: logger.info( "WARNRNG!!!\n" "TPS does not support variable shape in chinese!" "We set img_shape to be the same , it may affect the inference effect" ) image_shape = deepcopy(self.image_shape) image = fluid.data(name='image', shape=image_shape, dtype='float32') image.stop_gradient = False if self.loss_type == "srn": encoder_word_pos = fluid.data( name="encoder_word_pos", shape=[ -1, int((image_shape[-2] / 8) * (image_shape[-1] / 8)), 1 ], dtype="int64") gsrm_word_pos = fluid.data( name="gsrm_word_pos", shape=[-1, self.max_text_length, 1], dtype="int64") gsrm_slf_attn_bias1 = fluid.data( name="gsrm_slf_attn_bias1", shape=[ -1, self.num_heads, self.max_text_length, self.max_text_length ], dtype="float32") gsrm_slf_attn_bias2 = fluid.data( name="gsrm_slf_attn_bias2", shape=[ -1, self.num_heads, self.max_text_length, self.max_text_length ], dtype="float32") labels = { 'encoder_word_pos': encoder_word_pos, 'gsrm_word_pos': gsrm_word_pos, 'gsrm_slf_attn_bias1': gsrm_slf_attn_bias1, 'gsrm_slf_attn_bias2': gsrm_slf_attn_bias2 } return image, labels, loader def __call__(self, mode): image, labels, loader = self.create_feed(mode) if self.tps is None: inputs = image else: inputs = self.tps(image) # backbone conv_feas = self.backbone(inputs) # predict predicts = self.head(conv_feas, labels, mode) decoded_out = predicts['decoded_out'] # loss if mode == "train": loss = self.loss(predicts, labels) if self.loss_type == "attention": label = labels['label_out'] else: label = labels['label'] if self.loss_type == 'srn': total_loss, img_loss, word_loss = self.loss(predicts, labels) outputs = { 'total_loss': total_loss, 'img_loss': img_loss, 'word_loss': word_loss, 'decoded_out': decoded_out, 'label': label } else: outputs = {'total_loss':loss, 'decoded_out':\ decoded_out, 'label':label} return loader, outputs # export_model elif mode == "export": predict = predicts['predict'] if self.loss_type == "ctc": predict = fluid.layers.softmax(predict) if self.loss_type == "srn": return [ image, labels, { 'decoded_out': decoded_out, 'predicts': predict } ] return [image, {'decoded_out': decoded_out, 'predicts': predict}] # eval or test else: predict = predicts['predict'] if self.loss_type == "ctc": predict = fluid.layers.softmax(predict) return loader, {'decoded_out': decoded_out, 'predicts': predict}