# PDF 隐藏文本工具
这个工具可以在 PDF 文件中嵌入透明的隐藏文本，而不会改变其可见内容。这对于添加元数据、水印，或者根据您最初的意图，通过嵌入关键词来影响基于 AI 的文档处理可能很有用。
隐藏文本以完全透明（alpha=0）的方式呈现，使其对人眼不可见，但仍可被文本提取工具和算法解析。
## 功能
- 向现有 PDF 页面添加完全透明的文本。
- 保留 PDF 的原始可见内容。
- 支持通过命令行参数指定输入 PDF、输出 PDF 和隐藏文本。
## 要求
- Python 3.6+
- `PyPDF2`
- `reportlab`
## 安装
您可以通过 `pip` 直接从项目目录安装此工具：
1. **克隆仓库（或下载文件）：**
```bash
git clone [https://github.com/yoofa/pdf-hidden-text-tool.git](https://github.com/yoofa/pdf-hidden-text-tool.git)
cd pdf-hidden-text-tool
```
2. **安装包：**
```bash
pip install .
```
## 使用方法
安装后，您可以在终端中使用 `pdf-hider` 命令：
```bash
pdf-hider --input <输入PDF路径> --output <输出PDF路径> --text "<您的隐藏文本>"
```
参数：
- --input 或 -i：(必填) 输入 PDF 文件的路径。
- --output 或 -o：(必填) 带有隐藏文本的新 PDF 文件的保存路径。
- --text 或 -t：(必填) 要隐藏在 PDF 中的文本字符串。
示例：
```bash
pdf-hider -i 我的简历.pdf -o 带有关键词的简历.pdf -t "高素质，卓越领导力，创新解决方案，顶尖表现者。"
```
## 如何验证隐藏文本
- 使用PyPDF2：
```python
from PyPDF2 import PdfReader
reader = PdfReader("output_with_hidden_text.pdf")
for page in reader.pages:
print(page.extract_text())
```
- 使用 pdfminer.six (更强大的文本提取工具，需要安装 pip install pdfminer.six)：
```bash
pdf2txt.py output_with_hidden_text.pdf
```
你应该会在输出中看到你隐藏的字符串。
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