PaddleX/tutorials/train/object_detection/mv_train_img.py

import os
os.environ['CUDA_VISIBLE_DEVICES'] = '4'
import os.path as osp
import re
import cv2
import xml.etree.ElementTree as ET
import paddlex as pdx

file_list = 'dataset/train_list.txt'
save_dir = './visualize/train'
data_dir = 'dataset/'
if not os.path.exists(save_dir):
    os.makedirs(save_dir)

with open(file_list, 'r') as fr:
    while True:
        line = fr.readline()
        if not line:
            break
        img_file, xml_file = [osp.join(data_dir, x) \
                for x in line.strip().split()[:2]]
        if 'budaodian' not in img_file and 'cahua' not in img_file and 'loudi' not in img_file and 'zangdian' not in img_file:
            continue
        tree = ET.parse(xml_file)
        pattern = re.compile('<object>', re.IGNORECASE)
        obj_match = pattern.findall(str(ET.tostringlist(tree.getroot())))
        if len(obj_match) == 0:
            continue
        obj_tag = obj_match[0][1:-1]
        objs = tree.findall(obj_tag)
        pattern = re.compile('<size>', re.IGNORECASE)
        size_tag = pattern.findall(str(ET.tostringlist(tree.getroot())))[0][1:
                                                                            -1]
        size_element = tree.find(size_tag)
        pattern = re.compile('<width>', re.IGNORECASE)
        width_tag = pattern.findall(str(ET.tostringlist(size_element)))[0][1:
                                                                           -1]
        im_w = float(size_element.find(width_tag).text)
        pattern = re.compile('<height>', re.IGNORECASE)
        height_tag = pattern.findall(str(ET.tostringlist(size_element)))[0][1:
                                                                            -1]
        im_h = float(size_element.find(height_tag).text)
        gt_bbox = []
        gt_class = []
        for i, obj in enumerate(objs):
            pattern = re.compile('<name>', re.IGNORECASE)
            name_tag = pattern.findall(str(ET.tostringlist(obj)))[0][1:-1]
            cname = obj.find(name_tag).text.strip()
            gt_class.append(cname)
            pattern = re.compile('<difficult>', re.IGNORECASE)
            diff_tag = pattern.findall(str(ET.tostringlist(obj)))[0][1:-1]
            try:
                _difficult = int(obj.find(diff_tag).text)
            except Exception:
                _difficult = 0
            pattern = re.compile('<bndbox>', re.IGNORECASE)
            box_tag = pattern.findall(str(ET.tostringlist(obj)))[0][1:-1]
            box_element = obj.find(box_tag)
            pattern = re.compile('<xmin>', re.IGNORECASE)
            xmin_tag = pattern.findall(str(ET.tostringlist(box_element)))[0][
                1:-1]
            x1 = float(box_element.find(xmin_tag).text)
            pattern = re.compile('<ymin>', re.IGNORECASE)
            ymin_tag = pattern.findall(str(ET.tostringlist(box_element)))[0][
                1:-1]
            y1 = float(box_element.find(ymin_tag).text)
            pattern = re.compile('<xmax>', re.IGNORECASE)
            xmax_tag = pattern.findall(str(ET.tostringlist(box_element)))[0][
                1:-1]
            x2 = float(box_element.find(xmax_tag).text)
            pattern = re.compile('<ymax>', re.IGNORECASE)
            ymax_tag = pattern.findall(str(ET.tostringlist(box_element)))[0][
                1:-1]
            y2 = float(box_element.find(ymax_tag).text)
            x1 = max(0, x1)
            y1 = max(0, y1)
            if im_w > 0.5 and im_h > 0.5:
                x2 = min(im_w - 1, x2)
                y2 = min(im_h - 1, y2)
            gt_bbox.append([x1, y1, x2, y2])
        gts = []
        for bbox, name in zip(gt_bbox, gt_class):
            x1, y1, x2, y2 = bbox
            w = x2 - x1 + 1
            h = y2 - y1 + 1
            gt = {
                'category_id': 0,
                'category': name,
                'bbox': [x1, y1, w, h],
                'score': 1
            }
            gts.append(gt)
        gt_vis = pdx.det.visualize(img_file, gts, threshold=0.1, save_dir=None)
        cv2.imwrite(
            os.path.join(save_dir, os.path.split(img_file)[-1]), gt_vis)