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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2015/06/12 20:51:01 UTC
[jira] [Commented] (PDFBOX-2828) Blurred Images using PDFBox 2.0
[ https://issues.apache.org/jira/browse/PDFBOX-2828?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14583885#comment-14583885 ]
Tilman Hausherr commented on PDFBOX-2828:
-----------------------------------------
I don't really understand the problem - only the *300.png image is blurry, because it is too small. The other ones are not blurry. (If you display your own links with a browser, you have to click on them to see them in 1:1 resolution).
> Blurred Images using PDFBox 2.0
> -------------------------------
>
> Key: PDFBOX-2828
> URL: https://issues.apache.org/jira/browse/PDFBOX-2828
> Project: PDFBox
> Issue Type: Improvement
> Components: Rendering
> Affects Versions: 2.0.0
> Reporter: Lori
> Attachments: 1_4_resolution_1280.png, 3_4.pdf, 3_4_resolution_1280.png, 3_4_resolution_2000.png, 3_4_resolution_300.png
>
>
> PNG images generated from PDF are blurry. I've tried a variety of resolutions including default. (The code adjust scale so that the max of width or height equals the resolution). Any help appreciated - I am new to image processing so I apologize if I've missing something blatant.
> {code}
> PDPage page = doc.getPage(i);
> PDRectangle cropbBox = page.getCropBox();
> float widthPt = cropbBox.getWidth();
> float heightPt = cropbBox.getHeight();
> float max = Math.max(widthPt, heightPt);
> float scale = resolution/max;
> //int widthPx = Math.round(widthPt * scale);
> //nt heightPx = Math.round(heightPt * scale);
> BufferedImage image = renderer.renderImage(i, scale);//300 pixels/inches 1/72 inches/pt
> {code}
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