java - Java8, Tess4j : Optimize image for OCR with tesseract -


i working on tesseract , have ocr functionality working already. wanted optimize image ocr results better. making image monochrome , scaling double size. after having issues smaller fonts.

i tried looking up, , here 1 of top answers can find. unfortunately, works bitmap , cannot find native class in java works bitmap. there answer java code, again uses bitmap , doesn't specify package it.

anything more nice. thank you.

code :

private string testocr(string filelocation, int attachid) {         try {             file imagefile = new file(filelocation);             bufferedimage img = imageio.read(imagefile);             string identifier = string.valueof(new biginteger(130, random).tostring(32));             string blackandwhiteimage = previewpath + identifier + ".png";             file outputfile = new file(blackandwhiteimage);             bufferedimage bufferedimage = bitmapimageutil.converttograyscale(img,new dimension(img.getwidth(),img.getheight()));             bufferedimage = scalr.resize(bufferedimage,img.getwidth()*2,img.getheight()*2);             imageio.write(bufferedimage,"png",outputfile);              itesseract instance = tesseract.getinstance();             // point 1 folder above tessdata directory, must contain training data             instance.setdatapath("/usr/share/tesseract-ocr/");             // iso 693-3 standard             instance.setlanguage("deu");             string result = instance.doocr(outputfile); // result processing regex.  }

thank you.


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