問題描述

我有一個 pdf 文件(附件).我的目標是使用 pdfbox 原樣將 pdf 轉換為圖像(與在 Windows 中使用截圖工具相同).pdf有各種形狀和文字.

i have a pdf file(attached). My objective is to convert a pdf to an image using pdfbox AS IT IS,(same as using snipping tool in windows). The pdf has all kinds of shapes and text .

我正在使用以下代碼:

PDDocument doc = PDDocument.load("Hello World.pdf");
PDPage firstPage = (PDPage) doc.getDocumentCatalog().getAllPages().get(67);
BufferedImage bufferedImage = firstPage.convertToImage(imageType,screenResolution);
ImageIO.write(bufferedImage, "png",new File("out.png"));

當我使用代碼時，圖像文件給出完全錯誤的輸出(附加了 out.png)

when i use the code, the image file gives totally wrong outputs(out.png attached)

如何讓 pdfbox 拍攝類似直接快照圖像的內容?

how do i make pdfbox take something like a direct snapshot image?

另外，我注意到png的圖像質量不太好，有什么辦法可以提高生成圖像的分辨率?

also, i noticed that the image quality of the png is not so good, is there any way to increase the resolution of the generated image?

這是pdf(見第68頁)https://drive.google.com/file/d/0B0ZiP71EQHz2NVZUcElvbFNreEU/編輯?usp=共享

here is the pdf(see page number 68) https://drive.google.com/file/d/0B0ZiP71EQHz2NVZUcElvbFNreEU/edit?usp=sharing

編輯 2:似乎所有的文字都消失了.我也嘗試使用 PDFImageWriter 類

EDIT 2: it seems that all the text isvanishing. i also tried using the PDFImageWriter class

test.writeImage(doc, "png", null, 68, 69, "final.png",TYPE_USHORT_GRAY,200 );

同樣的結果

推薦答案

事實證明 jpedal(lgpl) 完美地完成了轉換(就像快照一樣).

it turns out that jpedal(lgpl) does the converting perfectly(just like a snapshot).

這是我用過的:

PdfDecoder decode_pdf = new PdfDecoder(true);


FontMappings.setFontReplacements();

    decode_pdf.openPdfFile("Hello World.pdf"); 


 decode_pdf.setExtractionMode(0,800,3);

 try {

     for(int i=0;i<40;i++)
     {  
         BufferedImage img=decode_pdf.getPageAsImage(2+i);

    ImageIO.write(img, "png",new File(String.valueOf(i)+"out.png"));
     }
} catch (IOException ex) {
    Logger.getLogger(NewJFrame.class.getName()).log(Level.SEVERE, null, ex);
}

    decode_pdf.closePdfFile();

} catch (PdfException e) {
    e.printStackTrace();
}

它工作正常.

這篇關于將 PDF 轉換為圖像(格式正確)的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！