轉換 PDF 到圖片：Python & Rust 簡單的方法

pip install pdf2image

from pdf2image import convert_from_path
pages = convert_from_path('test.pdf', dpi=300)
for count, page in enumerate(pages):
    page.save(f'test_{count}.png')

pip install PyMuPDF

import fitz
import io
from PIL import Image

pdf = fitz.open('test.pdf')

for count, page in enumerate(pdf.pages()):
    pixmap = page.get_pixmap(dpi=300)
    image = Image.open(io.BytesIO(pixmap.tobytes()))
    image.save(f'test_{count}.png')

.
├─pdfium-win-x64      
│  ├─bin
│  ├─include
│  └─lib
├─src
├── Cargo.lock
├── Cargo.toml
└── target

use image::ImageFormat;
use pdfium_render::prelude::*;

pub fn main() -> Result<(), PdfiumError> {
    // 讀取函式庫
    let bindings = Pdfium::bind_to_library(
        Pdfium::pdfium_platform_library_name_at_path("pdfium-win-x64\\bin"),
    )
    .or_else(
        |_| Pdfium::bind_to_system_library(),
    )?;

    let pdfium = Pdfium::new(bindings);
    
    // 設定轉換的參數
    const DPI: i32 = 300;
    let render_config = PdfRenderConfig::new()
        .scale_page_height_by_factor(DPI as f32 / 72f32)
        .scale_page_width_by_factor(DPI as f32 / 72f32);

    // 讀取 pdf 檔案並開始轉換
    let document = pdfium.load_pdf_from_file("test.pdf", None)?;
    for (index, page) in document.pages().iter().enumerate() {
        let result = page
            .render_with_config(&render_config)?
            .as_image()
            .to_rgba8()
            .save_with_format(format!("test_{}.png", index), ImageFormat::Png);

        assert!(result.is_ok());
    }

    Ok(())
}