我在java中编写了一些代码将彩色图像转换为黑白图像，然后尝试对该灰度图像执行细化。黑白转换成功完成，但图像细化仍然没有给出正确的输出。请帮助我解决我的问题。我的代码如下：
//colored image to black and white conversion; black and white image to thinned image.
public static void main(String[] args)
{
try
{
//colored image path
BufferedImage colored_image = ImageIO.read(new File("D:\\logo.jpg"));
//getting width and height of image
double image_width = colored_image.getWidth();
double image_height = colored_image.getHeight();
BufferedImage img = colored_image;
//drawing a new image
BufferedImage bimg = new BufferedImage((int)image_width, (int)image_height, BufferedImage.TYPE_BYTE_GRAY);
Graphics2D gg = bimg.createGraphics();
gg.drawImage(img, 0, 0, img.getWidth(null), img.getHeight(null), null);
//saving black and white image onto drive
String temp = "logo in blackAndwhite.jpeg";
File fi = new File("D:\\" + temp);
ImageIO.write(bimg, "jpg", fi);
//thinning by resizing gray scale image to desired eight and width
BufferedImage bimg2 = new BufferedImage((int)image_width, (int)image_height, BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = bimg2.createGraphics();
// Perform your drawing here
g2.setColor(Color.BLACK);
g2.drawLine(0, 0, 200, 200);
//saving thinned image onto drive
String temp2 = "logo thinned.jpeg";
File fi2 = new File("D:\\" + temp2);
ImageIO.write(bimg2, "jpg", fi2);
//g2.dispose();
}
catch (Exception e)
{
System.out.println(e);
}
}
}