如何将png文件作为参数传递给java中的方法？

import java.io.File;
import net.sourceforge.tess4j.*;

public class TesseractExample{

    public static void main(String[] args) {
	
        File imageFile = new File("C:\\test\\a.tif");
        Tesseract instance = Tesseract.getInstance(); // JNA Interface Mapping
        // Tesseract1 instance = new Tesseract1(); // JNA Direct Mapping

        try {
            String result = instance.doOCR(imageFile);
            System.out.println(result);
        } catch (TesseractException e) {
            System.err.println(e.getMessage());
        }
    }
}

以上程序是硬编码的，因为我正在路过使用path的tif文件。我想要的是将图像文件从其他程序直接传递给这个方法。请告诉我如何实现它？

The above program is hard coded because I''m passing the tif file using the path.What I want is to pass the image files directly to this method from other program.Please suggest How I can achieve it?