Error integration fingerprint U.are.U SDK with java web application

Question

I developed a web application using Java and play framework in the BackEnd, and AngularJS in the FrontEnd.

I did an integration with the U.are.U SDK for fingerprint scan

Answer 1

1. Convert your PNG image to raw bytearray in grayscale:

        // read an image from the disk
        BufferedImage image = ImageIO.read(new File("kittens.jpg"));
   
        setPreferredSize(new Dimension(
            image.getWidth(),image.getHeight()));
   
        // create a grayscale image the same size
        gray = new BufferedImage(image.getWidth(),image.getHeight(),
            BufferedImage.TYPE_BYTE_GRAY);
   
        // convert the original colored image to grayscale
        ColorConvertOp op = new ColorConvertOp(
            image.getColorModel().getColorSpace(),
            gray.getColorModel().getColorSpace(),null);
        op.filter(image,gray);
   
        //convert BuffuredImage to raw byte array
        WritableRaster raster = gray.getRaster();
        DataBufferByte data = (DataBufferByte) raster.getDataBuffer();    
        byte[] rawPixels = data.getData();
   

2. convert your bytearray to FID

        Fid fid = UareUGlobal.getImporter().ImportRaw(rawPixels, 
            width, height, inDpi, fingerPosition, cbeffId, 
            Fid.Format.ANSI_381_2004, outDpi, rotate180);
   

3. convert your FID to FMD

        Fmd fmd = UareUGlobal.GetEngine().CreateFmd(fid, 
            Fid.Format.ANSI_381_2004);
   

4. Now you could compare this Fmd with current capture