Region region = Region.US_EAST_1;
TextractClient textractClient = TextractClient.builder() .region(region) .build(); // Get the input Document object as bytes
Document pdfDoc = Document.builder() .bytes(SdkBytes.fromByteBuffer(imageBytes)) .build(); TranslateClient translateClient = TranslateClient.builder() .region(region) .build(); DetectDocumentTextRequest detectDocumentTextRequest = DetectDocumentTextRequest.builder() .document(pdfDoc) .build(); // Invoke the Detect operation
DetectDocumentTextResponse textResponse = textractClient.detectDocumentText(detectDocumentTextRequest); List<Block> blocks = textResponse.blocks();
List<TextLine> lines = new ArrayList<>();
BoundingBox boundingBox; for (Block block : blocks) { if ((block.blockType()).equals(BlockType.LINE)) { String source = block.text(); TranslateTextRequest requestTranslate = TranslateTextRequest.builder() .sourceLanguageCode(sourceLanguage) .targetLanguageCode(destinationLanguage) .text(source) .build(); TranslateTextResponse resultTranslate = translateClient.translateText(requestTranslate); boundingBox = block.geometry().boundingBox(); lines.add(new TextLine(boundingBox.left(), boundingBox.top(), boundingBox.width(), boundingBox.height(), resultTranslate.translatedText(), source)); }
}
return lines;

int fontSize = 20;
float textWidth = font.getStringWidth(text) / 1000 * fontSize;
float textHeight = font.getFontDescriptor().getFontBoundingBox().getHeight() / 1000 * fontSize;
 
if (textWidth > bbWidth) {
    while (textWidth > bbWidth) {
        fontSize -= 1;
        textWidth = font.getStringWidth(text) / 1000 * fontSize;
        textHeight = font.getFontDescriptor().getFontBoundingBox().getHeight() / 1000 * fontSize;
     }
} else if (textWidth < bbWidth) {
     while (textWidth < bbWidth) {
         fontSize += 1;
         textWidth = font.getStringWidth(text) / 1000 * fontSize;
         textHeight = font.getFontDescriptor().getFontBoundingBox().getHeight() / 1000 * fontSize;
      }
}

float width = image.getWidth();
float height = image.getHeight();
 
PDRectangle box = new PDRectangle(width, height);
PDPage page = new PDPage(box);
page.setMediaBox(box);
this.document.addPage(page); //org.apache.pdfbox.pdmodel.PDDocument
 
PDImageXObject pdImage;
 
if(imageType == ImageType.JPEG){
    pdImage = JPEGFactory.createFromImage(this.document, image);
} else {
    pdImage = LosslessFactory.createFromImage(this.document, image);
}
 
PDPageContentStream contentStream = new PDPageContentStream(document, page, PDPageContentStream.AppendMode.OVERWRITE, false);
 
contentStream.drawImage(pdImage, 0, 0);
contentStream.setRenderingMode(RenderingMode.FILL);
 
for (TextLine cline : lines){
    String clinetext = cline.text;
    String clinetextOriginal = cline.originalText;
                           FontInfo fontInfo = calculateFontSize(clinetextOriginal, (float) cline.width * width, (float) cline.height * height, font);
    //config to include original document structure - overlay with original
    contentStream.setNonStrokingColor(Color.WHITE);
    contentStream.addRect((float) cline.left * width, (float) (height - height * cline.top - fontInfo.textHeight), (float) cline.width * width, (float) cline.height * height);
    contentStream.fill();
 
    fontInfo = calculateFontSize(clinetext, (float) cline.width * width, (float) cline.height * height, font);
    //config to include original document structure - overlay with translated
    contentStream.setNonStrokingColor(Color.WHITE);
    contentStream.addRect((float) cline.left * width, (float) (height - height * cline.top - fontInfo.textHeight), (float) cline.width * width, (float) cline.height * height);
    contentStream.fill();
    //change the output text color here
    fontInfo = calculateFontSize(clinetext.length() <= clinetextOriginal.length() ? clinetextOriginal : clinetext, (float) cline.width * width, (float) cline.height * height, font);
    contentStream.setNonStrokingColor(Color.BLACK);
    contentStream.beginText();
    contentStream.setFont(font, fontInfo.fontSize);
    contentStream.newLineAtOffset((float) cline.left * width, (float) (height - height * cline.top - fontInfo.textHeight));
    contentStream.showText(clinetext);
    contentStream.endText();
}
contentStream.close()