Upload read_dgrl.py

read_dgrl.py

@@ -0,0 +1,125 @@
+import os
+import struct
+from pathlib import Path
+import cv2 as cv
+import numpy as np
+from tqdm import tqdm
+
+def read_from_dgrl(dgrl, line_spacing=10):
+    if not os.path.exists(dgrl):
+        print('DGRL not exists!')
+        return
+
+    dir_name, base_name = os.path.split(dgrl)
+    label_dir = dir_name + '_label'
+    image_dir = dir_name + '_images'
+    if not os.path.exists(label_dir):
+        os.makedirs(label_dir)
+    if not os.path.exists(image_dir):
+        os.makedirs(image_dir)
+
+    with open(dgrl, 'rb') as f:
+        # 读取表头尺寸
+        header_size = np.fromfile(f, dtype='uint8', count=4)
+        header_size = sum([j << (i*8) for i, j in enumerate(header_size)])
+
+        # 读取表头剩下内容，提取 code_length
+        header = np.fromfile(f, dtype='uint8', count=header_size-4)
+        code_length = sum([j << (i*8) for i, j in enumerate(header[-4:-2])])
+
+        # 读取图像尺寸信息，提取图像中行数量
+        image_record = np.fromfile(f, dtype='uint8', count=12)
+        height = sum([j << (i*8) for i, j in enumerate(image_record[:4])])
+        width = sum([j << (i*8) for i, j in enumerate(image_record[4:8])])
+        line_num = sum([j << (i*8) for i, j in enumerate(image_record[8:])])
+
+        # 初始化存储整张图片和文本的变量，背景设置为白色（255）
+        bitmap = np.ones((height + line_num * line_spacing, width), dtype='uint8') * 255
+        full_text = ""
+
+        current_y = 0  # 当前行的Y坐标起始位置
+
+        # 读取每一行文字的信息
+        for k in range(line_num):
+            # 读取该行的字符数量
+            char_num = np.fromfile(f, dtype='uint8', count=4)
+            char_num = sum([j << (i*8) for i, j in enumerate(char_num)])
+
+            # 读取该行的标注信息
+            label = np.fromfile(f, dtype='uint8', count=code_length*char_num)
+            label = [label[i] << (8*(i % code_length))
+                     for i in range(code_length*char_num)]
+            label = [sum(label[i*code_length:(i+1)*code_length])
+                     for i in range(char_num)]
+            label = [struct.pack('I', i).decode(
+                'gbk', 'ignore')[0] for i in label]
+
+            # 合并文本
+            label = ''.join(label)
+            label = ''.join(label.split(b'\x00'.decode()))
+            full_text += label
+
+            # 读取该行的位置和尺寸
+            pos_size = np.fromfile(f, dtype='uint8', count=16)
+            y = sum([j << (i*8) for i, j in enumerate(pos_size[:4])])
+            x = sum([j << (i*8) for i, j in enumerate(pos_size[4:8])])
+            h = sum([j << (i*8) for i, j in enumerate(pos_size[8:12])])
+            w = sum([j << (i*8) for i, j in enumerate(pos_size[12:])])
+
+            # 读取该行的图片
+            line_bitmap = np.fromfile(f, dtype='uint8', count=h*w)
+            line_bitmap = np.array(line_bitmap).reshape(h, w)
+
+            # 检查并调整目标区域的大小，避免粘贴出错
+            if current_y + h > bitmap.shape[0]:
+                h = bitmap.shape[0] - current_y
+                if h <= 0:
+                    print(f"Warning: Insufficient space for line {k+1}. Skipping this line.")
+                    continue  # 跳过当前行，防止粘贴出错
+                line_bitmap = line_bitmap[:h, :]
+
+            # 检查 x 和 w 是否有效
+            if x >= bitmap.shape[1]:
+                print(f"Warning: Invalid x position for line {k+1}. x={x}, Skipping this line.")
+                continue  # 跳过当前行
+
+            if w <= 0:
+                print(f"Warning: Width w is zero for line {k+1}. Skipping this line.")
+                continue  # 跳过当前行
+
+            if x + w > bitmap.shape[1]:
+                w = bitmap.shape[1] - x
+                if w <= 0:
+                    print(f"Warning: Insufficient width for line {k+1}. Skipping this line.")
+                    continue  # 跳过当前行
+                line_bitmap = line_bitmap[:, :w]
+
+            # 打印调试信息
+            print(f"Debug: Line {k+1}, x={x}, w={w}, line_bitmap.shape={line_bitmap.shape}")
+
+            # 粘贴该行图像到整张图片中的对应位置，并增加行间距
+            try:
+                bitmap[current_y:current_y+h, x:x+w] = line_bitmap[:, :w]
+            except ValueError as e:
+                print(f"Error while pasting line {k+1}: {e}")
+                continue  # 跳过当前行，防止因粘贴错误中断整个过程
+
+            current_y += h + line_spacing
+
+        # 去除空白部分
+        bitmap = bitmap[:current_y, :]
+
+        # 保存整张图片
+        bitmap_file = os.path.join(image_dir, base_name.replace('.dgrl', '.png'))
+        cv.imwrite(bitmap_file, bitmap)
+
+        # 保存合并后的文本段落
+        label_file = os.path.join(label_dir, base_name.replace('.dgrl', '.txt'))
+        with open(label_file, 'w') as f1:
+            f1.write(full_text)
+
+if __name__ == '__main__':
+    dgrl_paths = Path('/HWDB2.2Test').iterdir()
+    dgrl_paths = list(dgrl_paths)
+    for dgrl_path in tqdm(dgrl_paths):
+        read_from_dgrl(dgrl_path, line_spacing=10)