482 lines
17 KiB
Python
482 lines
17 KiB
Python
import cv2
|
||
import numpy as np
|
||
import fitz # PyMuPDF
|
||
import tkinter as tk
|
||
from tkinter import ttk
|
||
from PIL import Image, ImageTk
|
||
import tkinter.messagebox as messagebox
|
||
import datetime
|
||
|
||
"""
|
||
提取PDF中的竖排文本(针对分隔区域)
|
||
"""
|
||
|
||
class PDFProcessor:
|
||
def __init__(self):
|
||
self.image = None
|
||
self.regions = []
|
||
|
||
def convert_pdf_to_image(self, pdf_path, page_num=0):
|
||
# 打开PDF文件
|
||
doc = fitz.open(pdf_path)
|
||
page = doc[page_num]
|
||
|
||
# 将PDF页面转换为图片
|
||
pix = page.get_pixmap(matrix=fitz.Matrix(2, 2)) # 2倍缩放以获得更好的质量
|
||
img = Image.frombytes("RGB", [pix.width, pix.height], pix.samples)
|
||
|
||
# 转换为OpenCV格式
|
||
self.image = cv2.cvtColor(np.array(img), cv2.COLOR_RGB2BGR)
|
||
return self.image
|
||
|
||
def detect_regions(self):
|
||
if self.image is None:
|
||
return []
|
||
|
||
# 转换为灰度图
|
||
gray = cv2.cvtColor(self.image, cv2.COLOR_BGR2GRAY)
|
||
|
||
# 使用高斯模糊减少噪声
|
||
blurred = cv2.GaussianBlur(gray, (5, 5), 0)
|
||
|
||
# 自适应阈值处理
|
||
binary = cv2.adaptiveThreshold(
|
||
blurred,
|
||
255,
|
||
cv2.ADAPTIVE_THRESH_GAUSSIAN_C,
|
||
cv2.THRESH_BINARY_INV,
|
||
11,
|
||
2
|
||
)
|
||
|
||
# 膨胀操作
|
||
kernel = np.ones((3,3), np.uint8)
|
||
dilated = cv2.dilate(binary, kernel, iterations=1)
|
||
|
||
# 查找所有轮廓
|
||
contours, hierarchy = cv2.findContours(
|
||
dilated,
|
||
cv2.RETR_TREE,
|
||
cv2.CHAIN_APPROX_SIMPLE
|
||
)
|
||
|
||
# 收集所有可能的矩形区域
|
||
candidates = []
|
||
min_area = 1000
|
||
|
||
for cnt in contours:
|
||
peri = cv2.arcLength(cnt, True)
|
||
approx = cv2.approxPolyDP(cnt, 0.02 * peri, True)
|
||
|
||
x, y, w, h = cv2.boundingRect(cnt)
|
||
area = w * h
|
||
aspect_ratio = w / float(h) if h != 0 else 0
|
||
|
||
if (area > min_area and
|
||
w > 30 and h > 30 and
|
||
0.1 < aspect_ratio < 10):
|
||
|
||
if len(approx) >= 4:
|
||
candidates.append((x, y, w, h))
|
||
|
||
# 按宽度从大到小排序
|
||
candidates.sort(key=lambda x: x[2], reverse=True)
|
||
|
||
# 查找宽高一致的五个区域
|
||
target_regions = []
|
||
for i, (x1, y1, w1, h1) in enumerate(candidates):
|
||
similar_regions = [(x1, y1, w1, h1)]
|
||
|
||
# 在剩余区域中查找宽高相似的区域
|
||
for x2, y2, w2, h2 in candidates[i+1:]:
|
||
# 检查宽高是否相似（允许2%的误差）
|
||
if (abs(w2 - w1) / w1 < 0.02 and
|
||
abs(h2 - h1) / h1 < 0.02):
|
||
similar_regions.append((x2, y2, w2, h2))
|
||
|
||
# 如果找到至少5个相似区域
|
||
if len(similar_regions) >= 5:
|
||
# 按y坐标排序（从上到下）
|
||
similar_regions.sort(key=lambda x: x[1])
|
||
target_regions = similar_regions[:5]
|
||
break
|
||
|
||
self.regions = target_regions
|
||
return self.regions
|
||
|
||
class PDFViewer:
|
||
def __init__(self, root):
|
||
self.root = root
|
||
self.root.title("PDF区域检测器")
|
||
|
||
# 设置窗口初始大小
|
||
self.root.geometry("1024x768")
|
||
|
||
# 创建主框架
|
||
self.main_frame = ttk.Frame(self.root)
|
||
self.main_frame.pack(fill=tk.BOTH, expand=True)
|
||
|
||
# 创建工具栏
|
||
self.toolbar = ttk.Frame(self.main_frame)
|
||
self.toolbar.pack(side=tk.TOP, fill=tk.X)
|
||
|
||
# 添加缩放控制
|
||
self.zoom_label = ttk.Label(self.toolbar, text="缩放: ")
|
||
self.zoom_label.pack(side=tk.LEFT, padx=5)
|
||
|
||
self.zoom_scale = ttk.Scale(
|
||
self.toolbar,
|
||
from_=10,
|
||
to=200,
|
||
orient=tk.HORIZONTAL,
|
||
length=200,
|
||
command=self._on_zoom_change
|
||
)
|
||
self.zoom_scale.set(30) # 设置初始缩放为30%
|
||
self.zoom_scale.pack(side=tk.LEFT, padx=5)
|
||
|
||
# 创建框架来容纳画布和滚动条
|
||
self.frame = ttk.Frame(self.main_frame)
|
||
self.frame.pack(fill=tk.BOTH, expand=True)
|
||
|
||
# 创建水平和垂直滚动条
|
||
self.v_scrollbar = ttk.Scrollbar(self.frame, orient="vertical")
|
||
self.h_scrollbar = ttk.Scrollbar(self.frame, orient="horizontal")
|
||
self.v_scrollbar.pack(side=tk.RIGHT, fill=tk.Y)
|
||
self.h_scrollbar.pack(side=tk.BOTTOM, fill=tk.X)
|
||
|
||
# 创建画布并配置滚动
|
||
self.canvas = tk.Canvas(
|
||
self.frame,
|
||
yscrollcommand=self.v_scrollbar.set,
|
||
xscrollcommand=self.h_scrollbar.set,
|
||
bg='gray90' # 添加背景色以便于区分
|
||
)
|
||
self.canvas.pack(side=tk.LEFT, fill=tk.BOTH, expand=True)
|
||
|
||
# 配置滚动条
|
||
self.v_scrollbar.config(command=self.canvas.yview)
|
||
self.h_scrollbar.config(command=self.canvas.xview)
|
||
|
||
# 绑定鼠标事件
|
||
self.canvas.bind('<MouseWheel>', self._on_mousewheel_y)
|
||
self.canvas.bind('<Shift-MouseWheel>', self._on_mousewheel_x)
|
||
self.canvas.bind('<Button-4>', self._on_mousewheel_y)
|
||
self.canvas.bind('<Button-5>', self._on_mousewheel_y)
|
||
self.canvas.bind('<Shift-Button-4>', self._on_mousewheel_x)
|
||
self.canvas.bind('<Shift-Button-5>', self._on_mousewheel_x)
|
||
self.canvas.bind('<ButtonPress-1>', self._start_drag)
|
||
self.canvas.bind('<B1-Motion>', self._drag)
|
||
|
||
# 添加Ctrl+鼠标滚轮缩放
|
||
self.canvas.bind('<Control-MouseWheel>', self._on_zoom_wheel)
|
||
|
||
self.processor = PDFProcessor()
|
||
self.current_image = None
|
||
self.current_regions = None
|
||
self.zoom_factor = 0.3 # 改为30%的初始缩放
|
||
|
||
# 添加适应窗口大小的按钮
|
||
self.fit_button = ttk.Button(
|
||
self.toolbar,
|
||
text="适应窗口",
|
||
command=self._fit_to_window
|
||
)
|
||
self.fit_button.pack(side=tk.LEFT, padx=5)
|
||
|
||
# 绑定窗口大小改变事件
|
||
self.root.bind('<Configure>', self._on_window_resize)
|
||
|
||
# 添加页面控制
|
||
self.page_frame = ttk.Frame(self.toolbar)
|
||
self.page_frame.pack(side=tk.LEFT, padx=5)
|
||
|
||
self.page_label = ttk.Label(self.page_frame, text="页码：")
|
||
self.page_label.pack(side=tk.LEFT)
|
||
|
||
self.current_page = tk.StringVar(value="1")
|
||
self.total_pages = 1
|
||
|
||
self.page_entry = ttk.Entry(self.page_frame, textvariable=self.current_page, width=5)
|
||
self.page_entry.pack(side=tk.LEFT, padx=2)
|
||
|
||
self.total_pages_label = ttk.Label(self.page_frame, text="/1")
|
||
self.total_pages_label.pack(side=tk.LEFT)
|
||
|
||
self.prev_button = ttk.Button(self.page_frame, text="上一页", command=self._prev_page)
|
||
self.prev_button.pack(side=tk.LEFT, padx=2)
|
||
|
||
self.next_button = ttk.Button(self.page_frame, text="下一页", command=self._next_page)
|
||
self.next_button.pack(side=tk.LEFT, padx=2)
|
||
|
||
# 修改确认按钮文本
|
||
self.confirm_button = ttk.Button(
|
||
self.toolbar,
|
||
text="提取所有页面文字",
|
||
command=self._extract_text
|
||
)
|
||
self.confirm_button.pack(side=tk.LEFT, padx=5)
|
||
|
||
self.pdf_path = None
|
||
self.doc = None
|
||
|
||
# 加载默认PDF文件
|
||
default_pdf = "test.pdf"
|
||
try:
|
||
self.load_pdf(default_pdf)
|
||
except Exception as e:
|
||
messagebox.showerror("错误", f"无法加载默认PDF文件：{str(e)}")
|
||
|
||
def load_pdf(self, pdf_path):
|
||
"""加载PDF并显示"""
|
||
self.pdf_path = pdf_path
|
||
self.doc = fitz.open(pdf_path)
|
||
self.total_pages = len(self.doc)
|
||
self.total_pages_label.configure(text=f"/{self.total_pages}")
|
||
|
||
self._load_current_page()
|
||
|
||
def _load_current_page(self):
|
||
"""加载当前页面"""
|
||
try:
|
||
page_num = int(self.current_page.get()) - 1
|
||
if 0 <= page_num < self.total_pages:
|
||
image = self.processor.convert_pdf_to_image(self.pdf_path, page_num)
|
||
regions = self.processor.detect_regions()
|
||
self.current_image = image
|
||
self.current_regions = regions
|
||
self._update_display()
|
||
except ValueError:
|
||
messagebox.showerror("错误", "请输入有效的页码")
|
||
|
||
def _prev_page(self):
|
||
"""显示上一页"""
|
||
try:
|
||
current = int(self.current_page.get())
|
||
if current > 1:
|
||
self.current_page.set(str(current - 1))
|
||
self._load_current_page()
|
||
except ValueError:
|
||
pass
|
||
|
||
def _next_page(self):
|
||
"""显示下一页"""
|
||
try:
|
||
current = int(self.current_page.get())
|
||
if current < self.total_pages:
|
||
self.current_page.set(str(current + 1))
|
||
self._load_current_page()
|
||
except ValueError:
|
||
pass
|
||
|
||
def _update_display(self):
|
||
"""更新显示"""
|
||
if self.current_image is None:
|
||
return
|
||
|
||
# 获取原始尺寸
|
||
height, width = self.current_image.shape[:2]
|
||
|
||
# 计算缩放后的尺寸
|
||
new_width = int(width * self.zoom_factor)
|
||
new_height = int(height * self.zoom_factor)
|
||
|
||
# 缩放图片
|
||
resized_image = cv2.resize(self.current_image, (new_width, new_height))
|
||
|
||
# 转换并显示图片
|
||
image = cv2.cvtColor(resized_image, cv2.COLOR_BGR2RGB)
|
||
image_pil = Image.fromarray(image)
|
||
self.photo = ImageTk.PhotoImage(image=image_pil)
|
||
|
||
# 清除画布
|
||
self.canvas.delete("all")
|
||
|
||
# 显示图片
|
||
self.canvas.create_image(0, 0, image=self.photo, anchor=tk.NW)
|
||
|
||
# 绘制区域
|
||
if self.current_regions:
|
||
for i, (x, y, w, h) in enumerate(self.current_regions):
|
||
# 缩放坐标和尺寸
|
||
scaled_x = int(x * self.zoom_factor)
|
||
scaled_y = int(y * self.zoom_factor)
|
||
scaled_w = int(w * self.zoom_factor)
|
||
scaled_h = int(h * self.zoom_factor)
|
||
|
||
rect_id = self.canvas.create_rectangle(
|
||
scaled_x, scaled_y,
|
||
scaled_x + scaled_w,
|
||
scaled_y + scaled_h,
|
||
outline="red",
|
||
width=max(1, int(2 * self.zoom_factor)),
|
||
tags=f"region_{i+1}"
|
||
)
|
||
|
||
self.canvas.create_text(
|
||
scaled_x + scaled_w//2,
|
||
scaled_y - 10 * self.zoom_factor,
|
||
text=f"目标区域 {i+1} ({w}x{h})",
|
||
fill="red",
|
||
tags=f"region_{i+1}"
|
||
)
|
||
|
||
# 绑定鼠标事件
|
||
self.canvas.tag_bind(
|
||
f"region_{i+1}",
|
||
'<Enter>',
|
||
lambda e, rid=rect_id: self._highlight_region(rid)
|
||
)
|
||
self.canvas.tag_bind(
|
||
f"region_{i+1}",
|
||
'<Leave>',
|
||
lambda e, rid=rect_id: self._unhighlight_region(rid)
|
||
)
|
||
|
||
# 更新画布滚动区域
|
||
self.canvas.config(scrollregion=self.canvas.bbox(tk.ALL))
|
||
|
||
def _on_zoom_wheel(self, event):
|
||
"""处理Ctrl+滚轮缩放"""
|
||
if event.delta > 0:
|
||
self.zoom_scale.set(min(200, self.zoom_scale.get() + 10))
|
||
else:
|
||
self.zoom_scale.set(max(10, self.zoom_scale.get() - 10))
|
||
|
||
def _on_zoom_change(self, value):
|
||
"""处理缩放变化"""
|
||
self.zoom_factor = float(value) / 100
|
||
self._update_display()
|
||
|
||
def _on_mousewheel_y(self, event):
|
||
"""处理垂直方向的鼠标滚轮事件"""
|
||
if event.num == 4 or event.delta > 0:
|
||
self.canvas.yview_scroll(-1, "units")
|
||
elif event.num == 5 or event.delta < 0:
|
||
self.canvas.yview_scroll(1, "units")
|
||
|
||
def _on_mousewheel_x(self, event):
|
||
"""处理水平方向的鼠标滚轮事件"""
|
||
if event.num == 4 or event.delta > 0:
|
||
self.canvas.xview_scroll(-1, "units")
|
||
elif event.num == 5 or event.delta < 0:
|
||
self.canvas.xview_scroll(1, "units")
|
||
|
||
def _start_drag(self, event):
|
||
"""开始拖动"""
|
||
self.canvas.scan_mark(event.x, event.y)
|
||
|
||
def _drag(self, event):
|
||
"""拖动画布"""
|
||
self.canvas.scan_dragto(event.x, event.y, gain=1)
|
||
|
||
def _highlight_region(self, region_id):
|
||
"""高亮显示区域"""
|
||
self.canvas.itemconfig(region_id, width=max(2, int(3 * self.zoom_factor)), outline="yellow")
|
||
|
||
def _unhighlight_region(self, region_id):
|
||
"""取消高亮显示"""
|
||
self.canvas.itemconfig(region_id, width=max(1, int(2 * self.zoom_factor)), outline="red")
|
||
|
||
def _fit_to_window(self):
|
||
"""调整缩放以适应窗口大小"""
|
||
if self.current_image is None:
|
||
return
|
||
|
||
# 获取窗口和图像尺寸
|
||
window_width = self.canvas.winfo_width()
|
||
window_height = self.canvas.winfo_height()
|
||
image_height, image_width = self.current_image.shape[:2]
|
||
|
||
# 计算合适的缩放比例
|
||
width_ratio = window_width / image_width
|
||
height_ratio = window_height / image_height
|
||
|
||
# 选择较小的比例以确保完全显示
|
||
new_zoom = min(width_ratio, height_ratio) * 0.9 # 留出一些边距
|
||
|
||
# 更新缩放
|
||
self.zoom_scale.set(new_zoom * 100)
|
||
|
||
def _on_window_resize(self, event):
|
||
"""窗口大小改变时的处理"""
|
||
# 仅当事件来自主窗口时才处理
|
||
if event.widget == self.root:
|
||
# 更新画布滚动区域
|
||
self.canvas.config(scrollregion=self.canvas.bbox(tk.ALL))
|
||
|
||
def _extract_text(self):
|
||
"""提取所有页面的文字并分别保存到五个文件"""
|
||
if not self.doc:
|
||
messagebox.showwarning("警告", "请先加载PDF文件！")
|
||
return
|
||
|
||
try:
|
||
# 创建五个输出文件（使用追加模式）
|
||
base_path = self.pdf_path.rsplit('.', 1)[0]
|
||
output_files = [open(f"{base_path}_region{i+1}.txt", 'a', encoding='utf-8') for i in range(5)]
|
||
|
||
# 写入分隔符（带时间戳）
|
||
timestamp = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
|
||
for i, f in enumerate(output_files):
|
||
f.write(f"\n\n=== 新的提取任务 {timestamp} ===\n\n")
|
||
|
||
# 处理每一页
|
||
for page_num in range(self.total_pages):
|
||
# 更新当前页面以获取区域
|
||
self.current_page.set(str(page_num + 1))
|
||
self._load_current_page()
|
||
|
||
if not self.current_regions or len(self.current_regions) < 5:
|
||
messagebox.showwarning("警告", f"第 {page_num+1} 页未检测到足够区域，跳过该页")
|
||
continue
|
||
|
||
page = self.doc[page_num]
|
||
|
||
# 按y坐标排序处理每个区域
|
||
sorted_regions = sorted(self.current_regions, key=lambda x: x[1])
|
||
for region_idx, region in enumerate(sorted_regions[:5]): # 只取前五个区域
|
||
x, y, w, h = region
|
||
# 将OpenCV的坐标转换为PDF坐标（除以2因为之前放大了2倍）
|
||
pdf_x = x / 2
|
||
pdf_y = y / 2
|
||
pdf_w = w / 2
|
||
pdf_h = h / 2
|
||
|
||
rect = fitz.Rect(pdf_x, pdf_y, pdf_x + pdf_w, pdf_y + pdf_h)
|
||
text = page.get_text(clip=rect, sort=True)
|
||
|
||
if text.strip():
|
||
output_files[region_idx].write(
|
||
f"=== 第 {page_num + 1} 页 ===\n"
|
||
f"区域坐标: ({x}, {y}) 尺寸: {w}x{h}\n"
|
||
f"{text}\n"
|
||
"-------------------\n\n"
|
||
)
|
||
|
||
# 关闭所有文件
|
||
for f in output_files:
|
||
f.close()
|
||
|
||
messagebox.showinfo("成功", f"文字已分别保存到：\n"
|
||
f"{base_path}_region1.txt\n"
|
||
f"{base_path}_region2.txt\n"
|
||
f"{base_path}_region3.txt\n"
|
||
f"{base_path}_region4.txt\n"
|
||
f"{base_path}_region5.txt")
|
||
|
||
except Exception as e:
|
||
messagebox.showerror("错误", f"提取文字时发生错误：{str(e)}")
|
||
finally:
|
||
# 确保文件被关闭
|
||
for f in output_files:
|
||
if not f.closed:
|
||
f.close()
|
||
|
||
def main():
|
||
root = tk.Tk()
|
||
app = PDFViewer(root)
|
||
root.mainloop()
|
||
|
||
if __name__ == "__main__":
|
||
main() |