init

backend/tools/infer/utility.py

@@ -0,0 +1,645 @@
+# 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 argparse
+import os
+import sys
+import platform
+import cv2
+import numpy as np
+import paddle
+from PIL import Image, ImageDraw, ImageFont
+import math
+from paddle import inference
+import time
+from ppocr.utils.logging import get_logger
+
+
+def str2bool(v):
+    return v.lower() in ("true", "t", "1")
+
+
+def init_args():
+    parser = argparse.ArgumentParser()
+    # params for prediction engine
+    parser.add_argument("--use_gpu", type=str2bool, default=True)
+    parser.add_argument("--ir_optim", type=str2bool, default=True)
+    parser.add_argument("--use_tensorrt", type=str2bool, default=False)
+    parser.add_argument("--min_subgraph_size", type=int, default=15)
+    parser.add_argument("--precision", type=str, default="fp32")
+    parser.add_argument("--gpu_mem", type=int, default=500)
+
+    # params for text detector
+    parser.add_argument("--image_dir", type=str)
+    parser.add_argument("--det_algorithm", type=str, default='DB')
+    parser.add_argument("--det_model_dir", type=str)
+    parser.add_argument("--det_limit_side_len", type=float, default=960)
+    parser.add_argument("--det_limit_type", type=str, default='max')
+
+    # DB parmas
+    parser.add_argument("--det_db_thresh", type=float, default=0.3)
+    parser.add_argument("--det_db_box_thresh", type=float, default=0.6)
+    parser.add_argument("--det_db_unclip_ratio", type=float, default=1.5)
+    parser.add_argument("--max_batch_size", type=int, default=10)
+    parser.add_argument("--use_dilation", type=str2bool, default=False)
+    parser.add_argument("--det_db_score_mode", type=str, default="fast")
+    # EAST parmas
+    parser.add_argument("--det_east_score_thresh", type=float, default=0.8)
+    parser.add_argument("--det_east_cover_thresh", type=float, default=0.1)
+    parser.add_argument("--det_east_nms_thresh", type=float, default=0.2)
+
+    # SAST parmas
+    parser.add_argument("--det_sast_score_thresh", type=float, default=0.5)
+    parser.add_argument("--det_sast_nms_thresh", type=float, default=0.2)
+    parser.add_argument("--det_sast_polygon", type=str2bool, default=False)
+
+    # PSE parmas
+    parser.add_argument("--det_pse_thresh", type=float, default=0)
+    parser.add_argument("--det_pse_box_thresh", type=float, default=0.85)
+    parser.add_argument("--det_pse_min_area", type=float, default=16)
+    parser.add_argument("--det_pse_box_type", type=str, default='quad')
+    parser.add_argument("--det_pse_scale", type=int, default=1)
+
+    # FCE parmas
+    parser.add_argument("--scales", type=list, default=[8, 16, 32])
+    parser.add_argument("--alpha", type=float, default=1.0)
+    parser.add_argument("--beta", type=float, default=1.0)
+    parser.add_argument("--fourier_degree", type=int, default=5)
+    parser.add_argument("--det_fce_box_type", type=str, default='poly')
+
+    # params for text recognizer
+    parser.add_argument("--rec_algorithm", type=str, default='CRNN')
+    parser.add_argument("--rec_model_dir", type=str)
+    parser.add_argument("--rec_image_shape", type=str, default="3, 48, 320")
+    parser.add_argument("--rec_batch_num", type=int, default=6)
+    parser.add_argument("--max_text_length", type=int, default=25)
+    parser.add_argument(
+        "--rec_char_dict_path",
+        type=str,
+        default="./ppocr/utils/ppocr_keys_v1.txt")
+    parser.add_argument("--use_space_char", type=str2bool, default=True)
+    parser.add_argument(
+        "--vis_font_path", type=str, default="./doc/fonts/simfang.ttf")
+    parser.add_argument("--drop_score", type=float, default=0.5)
+
+    # params for e2e
+    parser.add_argument("--e2e_algorithm", type=str, default='PGNet')
+    parser.add_argument("--e2e_model_dir", type=str)
+    parser.add_argument("--e2e_limit_side_len", type=float, default=768)
+    parser.add_argument("--e2e_limit_type", type=str, default='max')
+
+    # PGNet parmas
+    parser.add_argument("--e2e_pgnet_score_thresh", type=float, default=0.5)
+    parser.add_argument(
+        "--e2e_char_dict_path", type=str, default="./ppocr/utils/ic15_dict.txt")
+    parser.add_argument("--e2e_pgnet_valid_set", type=str, default='totaltext')
+    parser.add_argument("--e2e_pgnet_mode", type=str, default='fast')
+
+    # params for text classifier
+    parser.add_argument("--use_angle_cls", type=str2bool, default=False)
+    parser.add_argument("--cls_model_dir", type=str)
+    parser.add_argument("--cls_image_shape", type=str, default="3, 48, 192")
+    parser.add_argument("--label_list", type=list, default=['0', '180'])
+    parser.add_argument("--cls_batch_num", type=int, default=6)
+    parser.add_argument("--cls_thresh", type=float, default=0.9)
+
+    parser.add_argument("--enable_mkldnn", type=str2bool, default=False)
+    parser.add_argument("--cpu_threads", type=int, default=10)
+    parser.add_argument("--use_pdserving", type=str2bool, default=False)
+    parser.add_argument("--warmup", type=str2bool, default=False)
+
+    #
+    parser.add_argument(
+        "--draw_img_save_dir", type=str, default="./inference_results")
+    parser.add_argument("--save_crop_res", type=str2bool, default=False)
+    parser.add_argument("--crop_res_save_dir", type=str, default="./output")
+
+    # multi-process
+    parser.add_argument("--use_mp", type=str2bool, default=False)
+    parser.add_argument("--total_process_num", type=int, default=1)
+    parser.add_argument("--process_id", type=int, default=0)
+
+    parser.add_argument("--benchmark", type=str2bool, default=False)
+    parser.add_argument("--save_log_path", type=str, default="./log_output/")
+
+    parser.add_argument("--show_log", type=str2bool, default=True)
+    parser.add_argument("--use_onnx", type=str2bool, default=False)
+    return parser
+
+
+def parse_args():
+    parser = init_args()
+    return parser.parse_args()
+
+
+def create_predictor(args, mode, logger):
+    if mode == "det":
+        model_dir = args.det_model_dir
+    elif mode == 'cls':
+        model_dir = args.cls_model_dir
+    elif mode == 'rec':
+        model_dir = args.rec_model_dir
+    elif mode == 'table':
+        model_dir = args.table_model_dir
+    else:
+        model_dir = args.e2e_model_dir
+
+    if model_dir is None:
+        logger.info("not find {} model file path {}".format(mode, model_dir))
+        sys.exit(0)
+    if args.use_onnx:
+        import onnxruntime as ort
+        model_file_path = model_dir
+        if not os.path.exists(model_file_path):
+            raise ValueError("not find model file path {}".format(
+                model_file_path))
+        sess = ort.InferenceSession(model_file_path)
+        return sess, sess.get_inputs()[0], None, None
+
+    else:
+        model_file_path = model_dir + "/inference.pdmodel"
+        params_file_path = model_dir + "/inference.pdiparams"
+        if not os.path.exists(model_file_path):
+            raise ValueError("not find model file path {}".format(
+                model_file_path))
+        if not os.path.exists(params_file_path):
+            raise ValueError("not find params file path {}".format(
+                params_file_path))
+
+        config = inference.Config(model_file_path, params_file_path)
+
+        if hasattr(args, 'precision'):
+            if args.precision == "fp16" and args.use_tensorrt:
+                precision = inference.PrecisionType.Half
+            elif args.precision == "int8":
+                precision = inference.PrecisionType.Int8
+            else:
+                precision = inference.PrecisionType.Float32
+        else:
+            precision = inference.PrecisionType.Float32
+
+        if args.use_gpu:
+            gpu_id = get_infer_gpuid()
+            if gpu_id is None:
+                logger.warning(
+                    "GPU is not found in current device by nvidia-smi. Please check your device or ignore it if run on jetson."
+                )
+            config.enable_use_gpu(args.gpu_mem, 0)
+            if args.use_tensorrt:
+                config.enable_tensorrt_engine(
+                    workspace_size=1 << 30,
+                    precision_mode=precision,
+                    max_batch_size=args.max_batch_size,
+                    min_subgraph_size=args.min_subgraph_size)
+                # skip the minmum trt subgraph
+            use_dynamic_shape = True
+            if mode == "det":
+                min_input_shape = {
+                    "x": [1, 3, 50, 50],
+                    "conv2d_92.tmp_0": [1, 120, 20, 20],
+                    "conv2d_91.tmp_0": [1, 24, 10, 10],
+                    "conv2d_59.tmp_0": [1, 96, 20, 20],
+                    "nearest_interp_v2_1.tmp_0": [1, 256, 10, 10],
+                    "nearest_interp_v2_2.tmp_0": [1, 256, 20, 20],
+                    "conv2d_124.tmp_0": [1, 256, 20, 20],
+                    "nearest_interp_v2_3.tmp_0": [1, 64, 20, 20],
+                    "nearest_interp_v2_4.tmp_0": [1, 64, 20, 20],
+                    "nearest_interp_v2_5.tmp_0": [1, 64, 20, 20],
+                    "elementwise_add_7": [1, 56, 2, 2],
+                    "nearest_interp_v2_0.tmp_0": [1, 256, 2, 2]
+                }
+                max_input_shape = {
+                    "x": [1, 3, 1536, 1536],
+                    "conv2d_92.tmp_0": [1, 120, 400, 400],
+                    "conv2d_91.tmp_0": [1, 24, 200, 200],
+                    "conv2d_59.tmp_0": [1, 96, 400, 400],
+                    "nearest_interp_v2_1.tmp_0": [1, 256, 200, 200],
+                    "conv2d_124.tmp_0": [1, 256, 400, 400],
+                    "nearest_interp_v2_2.tmp_0": [1, 256, 400, 400],
+                    "nearest_interp_v2_3.tmp_0": [1, 64, 400, 400],
+                    "nearest_interp_v2_4.tmp_0": [1, 64, 400, 400],
+                    "nearest_interp_v2_5.tmp_0": [1, 64, 400, 400],
+                    "elementwise_add_7": [1, 56, 400, 400],
+                    "nearest_interp_v2_0.tmp_0": [1, 256, 400, 400]
+                }
+                opt_input_shape = {
+                    "x": [1, 3, 640, 640],
+                    "conv2d_92.tmp_0": [1, 120, 160, 160],
+                    "conv2d_91.tmp_0": [1, 24, 80, 80],
+                    "conv2d_59.tmp_0": [1, 96, 160, 160],
+                    "nearest_interp_v2_1.tmp_0": [1, 256, 80, 80],
+                    "nearest_interp_v2_2.tmp_0": [1, 256, 160, 160],
+                    "conv2d_124.tmp_0": [1, 256, 160, 160],
+                    "nearest_interp_v2_3.tmp_0": [1, 64, 160, 160],
+                    "nearest_interp_v2_4.tmp_0": [1, 64, 160, 160],
+                    "nearest_interp_v2_5.tmp_0": [1, 64, 160, 160],
+                    "elementwise_add_7": [1, 56, 40, 40],
+                    "nearest_interp_v2_0.tmp_0": [1, 256, 40, 40]
+                }
+                min_pact_shape = {
+                    "nearest_interp_v2_26.tmp_0": [1, 256, 20, 20],
+                    "nearest_interp_v2_27.tmp_0": [1, 64, 20, 20],
+                    "nearest_interp_v2_28.tmp_0": [1, 64, 20, 20],
+                    "nearest_interp_v2_29.tmp_0": [1, 64, 20, 20]
+                }
+                max_pact_shape = {
+                    "nearest_interp_v2_26.tmp_0": [1, 256, 400, 400],
+                    "nearest_interp_v2_27.tmp_0": [1, 64, 400, 400],
+                    "nearest_interp_v2_28.tmp_0": [1, 64, 400, 400],
+                    "nearest_interp_v2_29.tmp_0": [1, 64, 400, 400]
+                }
+                opt_pact_shape = {
+                    "nearest_interp_v2_26.tmp_0": [1, 256, 160, 160],
+                    "nearest_interp_v2_27.tmp_0": [1, 64, 160, 160],
+                    "nearest_interp_v2_28.tmp_0": [1, 64, 160, 160],
+                    "nearest_interp_v2_29.tmp_0": [1, 64, 160, 160]
+                }
+                min_input_shape.update(min_pact_shape)
+                max_input_shape.update(max_pact_shape)
+                opt_input_shape.update(opt_pact_shape)
+            elif mode == "rec":
+                if args.rec_algorithm != "CRNN":
+                    use_dynamic_shape = False
+                imgH = int(args.rec_image_shape.split(',')[-2])
+                min_input_shape = {"x": [1, 3, imgH, 10]}
+                max_input_shape = {"x": [args.rec_batch_num, 3, imgH, 1536]}
+                opt_input_shape = {"x": [args.rec_batch_num, 3, imgH, 320]}
+            elif mode == "cls":
+                min_input_shape = {"x": [1, 3, 48, 10]}
+                max_input_shape = {"x": [args.rec_batch_num, 3, 48, 1024]}
+                opt_input_shape = {"x": [args.rec_batch_num, 3, 48, 320]}
+            else:
+                use_dynamic_shape = False
+            if use_dynamic_shape:
+                config.set_trt_dynamic_shape_info(
+                    min_input_shape, max_input_shape, opt_input_shape)
+
+        else:
+            config.disable_gpu()
+            if hasattr(args, "cpu_threads"):
+                config.set_cpu_math_library_num_threads(args.cpu_threads)
+            else:
+                # default cpu threads as 10
+                config.set_cpu_math_library_num_threads(10)
+            if args.enable_mkldnn:
+                # cache 10 different shapes for mkldnn to avoid memory leak
+                config.set_mkldnn_cache_capacity(10)
+                config.enable_mkldnn()
+                if args.precision == "fp16":
+                    config.enable_mkldnn_bfloat16()
+        # enable memory optim
+        config.enable_memory_optim()
+        config.disable_glog_info()
+        config.delete_pass("conv_transpose_eltwiseadd_bn_fuse_pass")
+        config.delete_pass("matmul_transpose_reshape_fuse_pass")
+        if mode == 'table':
+            config.delete_pass("fc_fuse_pass")  # not supported for table
+        config.switch_use_feed_fetch_ops(False)
+        config.switch_ir_optim(True)
+
+        # create predictor
+        predictor = inference.create_predictor(config)
+        input_names = predictor.get_input_names()
+        for name in input_names:
+            input_tensor = predictor.get_input_handle(name)
+        output_tensors = get_output_tensors(args, mode, predictor)
+        return predictor, input_tensor, output_tensors, config
+
+
+def get_output_tensors(args, mode, predictor):
+    output_names = predictor.get_output_names()
+    output_tensors = []
+    if mode == "rec" and args.rec_algorithm == "CRNN":
+        output_name = 'softmax_0.tmp_0'
+        if output_name in output_names:
+            return [predictor.get_output_handle(output_name)]
+        else:
+            for output_name in output_names:
+                output_tensor = predictor.get_output_handle(output_name)
+                output_tensors.append(output_tensor)
+    else:
+        for output_name in output_names:
+            output_tensor = predictor.get_output_handle(output_name)
+            output_tensors.append(output_tensor)
+    return output_tensors
+
+
+def get_infer_gpuid():
+    sysstr = platform.system()
+    if sysstr == "Windows":
+        return 0
+
+    if not paddle.fluid.core.is_compiled_with_rocm():
+        cmd = "env | grep CUDA_VISIBLE_DEVICES"
+    else:
+        cmd = "env | grep HIP_VISIBLE_DEVICES"
+    env_cuda = os.popen(cmd).readlines()
+    if len(env_cuda) == 0:
+        return 0
+    else:
+        gpu_id = env_cuda[0].strip().split("=")[1]
+        return int(gpu_id[0])
+
+
+def draw_e2e_res(dt_boxes, strs, img_path):
+    src_im = cv2.imread(img_path)
+    for box, str in zip(dt_boxes, strs):
+        box = box.astype(np.int32).reshape((-1, 1, 2))
+        cv2.polylines(src_im, [box], True, color=(255, 255, 0), thickness=2)
+        cv2.putText(
+            src_im,
+            str,
+            org=(int(box[0, 0, 0]), int(box[0, 0, 1])),
+            fontFace=cv2.FONT_HERSHEY_COMPLEX,
+            fontScale=0.7,
+            color=(0, 255, 0),
+            thickness=1)
+    return src_im
+
+
+def draw_text_det_res(dt_boxes, img_path):
+    src_im = cv2.imread(img_path)
+    for box in dt_boxes:
+        box = np.array(box).astype(np.int32).reshape(-1, 2)
+        cv2.polylines(src_im, [box], True, color=(255, 255, 0), thickness=2)
+    return src_im
+
+
+def resize_img(img, input_size=600):
+    """
+    resize img and limit the longest side of the image to input_size
+    """
+    img = np.array(img)
+    im_shape = img.shape
+    im_size_max = np.max(im_shape[0:2])
+    im_scale = float(input_size) / float(im_size_max)
+    img = cv2.resize(img, None, None, fx=im_scale, fy=im_scale)
+    return img
+
+
+def draw_ocr(image,
+             boxes,
+             txts=None,
+             scores=None,
+             drop_score=0.5,
+             font_path="./doc/fonts/simfang.ttf"):
+    """
+    Visualize the results of OCR detection and recognition
+    args:
+        image(Image|array): RGB image
+        boxes(list): boxes with shape(N, 4, 2)
+        txts(list): the texts
+        scores(list): txxs corresponding scores
+        drop_score(float): only scores greater than drop_threshold will be visualized
+        font_path: the path of font which is used to draw text
+    return(array):
+        the visualized img
+    """
+    if scores is None:
+        scores = [1] * len(boxes)
+    box_num = len(boxes)
+    for i in range(box_num):
+        if scores is not None and (scores[i] < drop_score or
+                                   math.isnan(scores[i])):
+            continue
+        box = np.reshape(np.array(boxes[i]), [-1, 1, 2]).astype(np.int64)
+        image = cv2.polylines(np.array(image), [box], True, (255, 0, 0), 2)
+    if txts is not None:
+        img = np.array(resize_img(image, input_size=600))
+        txt_img = text_visual(
+            txts,
+            scores,
+            img_h=img.shape[0],
+            img_w=600,
+            threshold=drop_score,
+            font_path=font_path)
+        img = np.concatenate([np.array(img), np.array(txt_img)], axis=1)
+        return img
+    return image
+
+
+def draw_ocr_box_txt(image,
+                     boxes,
+                     txts,
+                     scores=None,
+                     drop_score=0.5,
+                     font_path="./doc/simfang.ttf"):
+    h, w = image.height, image.width
+    img_left = image.copy()
+    img_right = Image.new('RGB', (w, h), (255, 255, 255))
+
+    import random
+
+    random.seed(0)
+    draw_left = ImageDraw.Draw(img_left)
+    draw_right = ImageDraw.Draw(img_right)
+    for idx, (box, txt) in enumerate(zip(boxes, txts)):
+        if scores is not None and scores[idx] < drop_score:
+            continue
+        color = (random.randint(0, 255), random.randint(0, 255),
+                 random.randint(0, 255))
+        draw_left.polygon(box, fill=color)
+        draw_right.polygon(
+            [
+                box[0][0], box[0][1], box[1][0], box[1][1], box[2][0],
+                box[2][1], box[3][0], box[3][1]
+            ],
+            outline=color)
+        box_height = math.sqrt((box[0][0] - box[3][0])**2 + (box[0][1] - box[3][
+            1])**2)
+        box_width = math.sqrt((box[0][0] - box[1][0])**2 + (box[0][1] - box[1][
+            1])**2)
+        if box_height > 2 * box_width:
+            font_size = max(int(box_width * 0.9), 10)
+            font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
+            cur_y = box[0][1]
+            for c in txt:
+                char_size = font.getsize(c)
+                draw_right.text(
+                    (box[0][0] + 3, cur_y), c, fill=(0, 0, 0), font=font)
+                cur_y += char_size[1]
+        else:
+            font_size = max(int(box_height * 0.8), 10)
+            font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
+            draw_right.text(
+                [box[0][0], box[0][1]], txt, fill=(0, 0, 0), font=font)
+    img_left = Image.blend(image, img_left, 0.5)
+    img_show = Image.new('RGB', (w * 2, h), (255, 255, 255))
+    img_show.paste(img_left, (0, 0, w, h))
+    img_show.paste(img_right, (w, 0, w * 2, h))
+    return np.array(img_show)
+
+
+def str_count(s):
+    """
+    Count the number of Chinese characters,
+    a single English character and a single number
+    equal to half the length of Chinese characters.
+    args:
+        s(string): the input of string
+    return(int):
+        the number of Chinese characters
+    """
+    import string
+    count_zh = count_pu = 0
+    s_len = len(s)
+    en_dg_count = 0
+    for c in s:
+        if c in string.ascii_letters or c.isdigit() or c.isspace():
+            en_dg_count += 1
+        elif c.isalpha():
+            count_zh += 1
+        else:
+            count_pu += 1
+    return s_len - math.ceil(en_dg_count / 2)
+
+
+def text_visual(texts,
+                scores,
+                img_h=400,
+                img_w=600,
+                threshold=0.,
+                font_path="./doc/simfang.ttf"):
+    """
+    create new blank img and draw txt on it
+    args:
+        texts(list): the text will be draw
+        scores(list|None): corresponding score of each txt
+        img_h(int): the height of blank img
+        img_w(int): the width of blank img
+        font_path: the path of font which is used to draw text
+    return(array):
+    """
+    if scores is not None:
+        assert len(texts) == len(
+            scores), "The number of txts and corresponding scores must match"
+
+    def create_blank_img():
+        blank_img = np.ones(shape=[img_h, img_w], dtype=np.int8) * 255
+        blank_img[:, img_w - 1:] = 0
+        blank_img = Image.fromarray(blank_img).convert("RGB")
+        draw_txt = ImageDraw.Draw(blank_img)
+        return blank_img, draw_txt
+
+    blank_img, draw_txt = create_blank_img()
+
+    font_size = 20
+    txt_color = (0, 0, 0)
+    font = ImageFont.truetype(font_path, font_size, encoding="utf-8")
+
+    gap = font_size + 5
+    txt_img_list = []
+    count, index = 1, 0
+    for idx, txt in enumerate(texts):
+        index += 1
+        if scores[idx] < threshold or math.isnan(scores[idx]):
+            index -= 1
+            continue
+        first_line = True
+        while str_count(txt) >= img_w // font_size - 4:
+            tmp = txt
+            txt = tmp[:img_w // font_size - 4]
+            if first_line:
+                new_txt = str(index) + ': ' + txt
+                first_line = False
+            else:
+                new_txt = '    ' + txt
+            draw_txt.text((0, gap * count), new_txt, txt_color, font=font)
+            txt = tmp[img_w // font_size - 4:]
+            if count >= img_h // gap - 1:
+                txt_img_list.append(np.array(blank_img))
+                blank_img, draw_txt = create_blank_img()
+                count = 0
+            count += 1
+        if first_line:
+            new_txt = str(index) + ': ' + txt + '   ' + '%.3f' % (scores[idx])
+        else:
+            new_txt = "  " + txt + "  " + '%.3f' % (scores[idx])
+        draw_txt.text((0, gap * count), new_txt, txt_color, font=font)
+        # whether add new blank img or not
+        if count >= img_h // gap - 1 and idx + 1 < len(texts):
+            txt_img_list.append(np.array(blank_img))
+            blank_img, draw_txt = create_blank_img()
+            count = 0
+        count += 1
+    txt_img_list.append(np.array(blank_img))
+    if len(txt_img_list) == 1:
+        blank_img = np.array(txt_img_list[0])
+    else:
+        blank_img = np.concatenate(txt_img_list, axis=1)
+    return np.array(blank_img)
+
+
+def base64_to_cv2(b64str):
+    import base64
+    data = base64.b64decode(b64str.encode('utf8'))
+    data = np.fromstring(data, np.uint8)
+    data = cv2.imdecode(data, cv2.IMREAD_COLOR)
+    return data
+
+
+def draw_boxes(image, boxes, scores=None, drop_score=0.5):
+    if scores is None:
+        scores = [1] * len(boxes)
+    for (box, score) in zip(boxes, scores):
+        if score < drop_score:
+            continue
+        box = np.reshape(np.array(box), [-1, 1, 2]).astype(np.int64)
+        image = cv2.polylines(np.array(image), [box], True, (255, 0, 0), 2)
+    return image
+
+
+def get_rotate_crop_image(img, points):
+    '''
+    img_height, img_width = img.shape[0:2]
+    left = int(np.min(points[:, 0]))
+    right = int(np.max(points[:, 0]))
+    top = int(np.min(points[:, 1]))
+    bottom = int(np.max(points[:, 1]))
+    img_crop = img[top:bottom, left:right, :].copy()
+    points[:, 0] = points[:, 0] - left
+    points[:, 1] = points[:, 1] - top
+    '''
+    assert len(points) == 4, "shape of points must be 4*2"
+    img_crop_width = int(
+        max(
+            np.linalg.norm(points[0] - points[1]),
+            np.linalg.norm(points[2] - points[3])))
+    img_crop_height = int(
+        max(
+            np.linalg.norm(points[0] - points[3]),
+            np.linalg.norm(points[1] - points[2])))
+    pts_std = np.float32([[0, 0], [img_crop_width, 0],
+                          [img_crop_width, img_crop_height],
+                          [0, img_crop_height]])
+    M = cv2.getPerspectiveTransform(points, pts_std)
+    dst_img = cv2.warpPerspective(
+        img,
+        M, (img_crop_width, img_crop_height),
+        borderMode=cv2.BORDER_REPLICATE,
+        flags=cv2.INTER_CUBIC)
+    dst_img_height, dst_img_width = dst_img.shape[0:2]
+    if dst_img_height * 1.0 / dst_img_width >= 1.5:
+        dst_img = np.rot90(dst_img)
+    return dst_img
+
+
+def check_gpu(use_gpu):
+    if use_gpu and not paddle.is_compiled_with_cuda():
+        use_gpu = False
+    return use_gpu
+
+
+if __name__ == '__main__':
+    pass