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https://issues.apache.org/jira/browse/PDFBOX-1201?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13179965#comment-13179965
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Ilija Pavlic commented on PDFBOX-1201:
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It seems like the missed text is part of the larger text box that starts and
ends outside the capture region but the text itself is located inside the
capture region.
> PDFTextStripperByArea y coordinate shifted "up"
> -----------------------------------------------
>
> Key: PDFBOX-1201
> URL: https://issues.apache.org/jira/browse/PDFBOX-1201
> Project: PDFBox
> Issue Type: Bug
> Components: Text extraction
> Affects Versions: 1.6.0
> Reporter: Ilija Pavlic
> Priority: Minor
>
> The text stripper region seems to be shifted up from the given coordinates,
> causing lines below the region to be included and ones above the defined
> region to be included.
> ...
> PDPage page = (PDPage) allPages.get(0);
> PDFTextStripperByArea stripper = new PDFTextStripperByArea();
> Rectangle2D.Float region = new Rectangle2D.Float(x, y, width, height);
> stripper.addRegion("test region", region);
> // overlay the region with a cyan rectangle to check if I got the coordinates
> and dimensions right
> PDPageContentStream contentStream = new PDPageContentStream(document, page,
> true, true);
> contentStream.setNonStrokingColor( Color.CYAN );
> contentStream.fillRect(x, y, width, height);
> contentStream.close();
> stripper.extractRegions(page);
> String content = stripper.getTextForRegion("test region");
> ...
> document.save(...);
> ...
> The cyan rectangle overlays the desired region exactly when viewing the saved
> output document. On the other hand, stripper misses a couple of lines at the
> bottom of the rectangle and includes couple of lines above the rectangle.
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