iText - Get Font size and family of a text segment
itext, java, pdf, pdf-extraction, text-extraction
Solution
You can adapt the code provided in this answer, in particular this code snippet:
Vector curBaseline = renderInfo.GetBaseline().GetStartPoint();
Vector topRight = renderInfo.GetAscentLine().GetEndPoint();
iTextSharp.text.Rectangle rect = new iTextSharp.text.Rectangle(curBaseline[Vector.I1], curBaseline[Vector.I2], topRight[Vector.I1], topRight[Vector.I2]);
Single curFontSize = rect.Height;
This answer is in C#, but the API is so similar that the conversion to Java should be straightforward.
Problem
I'm currently trying to automatically extract important keywords from a PDF file. I am able to get the text information out of the PDF document. But now I need to know, which font size and font family these keywords have. The following code I already have: Main ``` public static void main(String[] args) throws IOException { String src = "SEM_081145.pdf"; PdfReader reader = new PdfReader(src); SemTextExtractionStrategy semTextExtractionStrategy = new SemTextExtractionStrategy(); PrintWriter out = new PrintWriter(new FileOutputStream(src + ".txt")); Rectangle rect = new Rectangle(70, 80, 490, 580); RenderFilter filter = new RegionTextRenderFilter(rect); for (int i = 1; i <= reader.getNumberOfPages(); i++) { // strategy = new FilteredTextRenderListener(new LocationTextExtractionStrategy(), filter); out.println(PdfTextExtractor.getTextFromPage(reader, i, semTextExtractionStrategy)); } out.flush(); out.close(); } ``` And I have implemented the TextExtraction Strategy `SemTextExtractionStrategy` which looks like this: ``` public class SemTextExtractionStrategy implements TextExtractionStrategy { private String text; @Override public void beginTextBlock() { } @Override public void renderText(TextRenderInfo renderInfo) { text = renderInfo.getText(); System.out.println(renderInfo.getFont().getFontType()); System.out.print(text); } @Override public void endTextBlock() { } @Override public void renderImage(ImageRenderInfo renderInfo) { } @Override public String getResultantText() { return text; } } ``` I can get the FontType but there is no method to get the font size. Is there another way or how can I get the font size of the current text segment? Or are there any other libraries which can fetch out the font size from TextSegments? I already had a look into PDFBox, and PDFTextStream. The PDF Shareware Library from Aspose would perfectly do the job. But it's very expensive and I need to use an open source project.