ppstructure/table/predict_structure.py

# 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.
import os
import sys

__dir__ = os.path.dirname(os.path.abspath(__file__))
sys.path.append(__dir__)
sys.path.insert(0, os.path.abspath(os.path.join(__dir__, "../..")))

os.environ["FLAGS_allocator_strategy"] = "auto_growth"

import cv2
import numpy as np
import time
import json

import tools.infer.utility as utility
from ppocr.data import create_operators, transform
from ppocr.postprocess import build_post_process
from ppocr.utils.logging import get_logger
from ppocr.utils.utility import get_image_file_list, check_and_read
from ppocr.utils.visual import draw_rectangle
from ppstructure.utility import parse_args

logger = get_logger()


def build_pre_process_list(args):
    resize_op = {
        "ResizeTableImage": {
            "max_len": args.table_max_len,
        }
    }
    pad_op = {"PaddingTableImage": {"size": [args.table_max_len, args.table_max_len]}}
    normalize_op = {
        "NormalizeImage": {
            "std": (
                [0.229, 0.224, 0.225]
                if args.table_algorithm not in ["TableMaster"]
                else [0.5, 0.5, 0.5]
            ),
            "mean": (
                [0.485, 0.456, 0.406]
                if args.table_algorithm not in ["TableMaster"]
                else [0.5, 0.5, 0.5]
            ),
            "scale": "1./255.",
            "order": "hwc",
        }
    }
    to_chw_op = {"ToCHWImage": None}
    keep_keys_op = {"KeepKeys": {"keep_keys": ["image", "shape"]}}
    if args.table_algorithm not in ["TableMaster"]:
        pre_process_list = [resize_op, normalize_op, pad_op, to_chw_op, keep_keys_op]
    else:
        pre_process_list = [resize_op, pad_op, normalize_op, to_chw_op, keep_keys_op]
    return pre_process_list


class TableStructurer(object):
    def __init__(self, args):
        self.args = args
        self.use_onnx = args.use_onnx
        pre_process_list = build_pre_process_list(args)
        if args.table_algorithm not in ["TableMaster"]:
            postprocess_params = {
                "name": "TableLabelDecode",
                "character_dict_path": args.table_char_dict_path,
                "merge_no_span_structure": args.merge_no_span_structure,
            }
        else:
            postprocess_params = {
                "name": "TableMasterLabelDecode",
                "character_dict_path": args.table_char_dict_path,
                "box_shape": "pad",
                "merge_no_span_structure": args.merge_no_span_structure,
            }

        self.preprocess_op = create_operators(pre_process_list)
        self.postprocess_op = build_post_process(postprocess_params)
        (
            self.predictor,
            self.input_tensor,
            self.output_tensors,
            self.config,
        ) = utility.create_predictor(args, "table", logger)

        if args.benchmark:
            import auto_log

            pid = os.getpid()
            gpu_id = utility.get_infer_gpuid()
            self.autolog = auto_log.AutoLogger(
                model_name="table",
                model_precision=args.precision,
                batch_size=1,
                data_shape="dynamic",
                save_path=None,  # args.save_log_path,
                inference_config=self.config,
                pids=pid,
                process_name=None,
                gpu_ids=gpu_id if args.use_gpu else None,
                time_keys=["preprocess_time", "inference_time", "postprocess_time"],
                warmup=0,
                logger=logger,
            )

    def __call__(self, img):
        starttime = time.time()
        if self.args.benchmark:
            self.autolog.times.start()

        ori_im = img.copy()
        data = {"image": img}
        data = transform(data, self.preprocess_op)
        img = data[0]
        if img is None:
            return None, 0
        img = np.expand_dims(img, axis=0)
        img = img.copy()
        if self.args.benchmark:
            self.autolog.times.stamp()
        if self.use_onnx:
            input_dict = {}
            input_dict[self.input_tensor.name] = img
            outputs = self.predictor.run(self.output_tensors, input_dict)
        else:
            self.input_tensor.copy_from_cpu(img)
            self.predictor.run()
            outputs = []
            for output_tensor in self.output_tensors:
                output = output_tensor.copy_to_cpu()
                outputs.append(output)
            if self.args.benchmark:
                self.autolog.times.stamp()

        preds = {}
        preds["structure_probs"] = outputs[1]
        preds["loc_preds"] = outputs[0]

        shape_list = np.expand_dims(data[-1], axis=0)
        post_result = self.postprocess_op(preds, [shape_list])

        structure_str_list = post_result["structure_batch_list"][0]
        bbox_list = post_result["bbox_batch_list"][0]
        structure_str_list = structure_str_list[0]
        structure_str_list = (
            ["<html>", "<body>", "<table>"]
            + structure_str_list
            + ["</table>", "</body>", "</html>"]
        )
        elapse = time.time() - starttime
        if self.args.benchmark:
            self.autolog.times.end(stamp=True)
        return (structure_str_list, bbox_list), elapse


def main(args):
    image_file_list = get_image_file_list(args.image_dir)
    table_structurer = TableStructurer(args)
    count = 0
    total_time = 0
    os.makedirs(args.output, exist_ok=True)
    with open(
        os.path.join(args.output, "infer.txt"), mode="w", encoding="utf-8"
    ) as f_w:
        for image_file in image_file_list:
            img, flag, _ = check_and_read(image_file)
            if not flag:
                img = cv2.imread(image_file)
            if img is None:
                logger.info("error in loading image:{}".format(image_file))
                continue
            structure_res, elapse = table_structurer(img)
            structure_str_list, bbox_list = structure_res
            bbox_list_str = json.dumps(bbox_list.tolist())
            logger.info("result: {}, {}".format(structure_str_list, bbox_list_str))
            f_w.write("result: {}, {}\n".format(structure_str_list, bbox_list_str))

            if len(bbox_list) > 0 and len(bbox_list[0]) == 4:
                img = draw_rectangle(image_file, bbox_list)
            else:
                img = utility.draw_boxes(img, bbox_list)
            img_save_path = os.path.join(args.output, os.path.basename(image_file))
            cv2.imwrite(img_save_path, img)
            logger.info("save vis result to {}".format(img_save_path))
            if count > 0:
                total_time += elapse
            count += 1
            logger.info("Predict time of {}: {}".format(image_file, elapse))
    if args.benchmark:
        table_structurer.autolog.report()


if __name__ == "__main__":
    main(parse_args())