java上图像的宽度和高度属性问题

Question

I'm having a problem with the Width and Height Property of an image on java. For some reason the are null.

And on the properties of the image, I have the dimensions of the file.

I need to control the dimension for not get an exception when the image are displayed on screen. Because I have to calculate the dimensions when zoon in or out and some other stuffs.

This is the code to loading and verificate the image widht and height

if (confirmOverwrite()) {
            FileChooser fileChooser = new FileChooser();
            if (previousImportDir != null) {
                fileChooser.setInitialDirectory(previousImportDir.getParentFile());
            }
            fileChooser.getExtensionFilters().add(new FileChooser.ExtensionFilter("Arquivos de Imagem", "*.png", "*.jpg", "*.bmp", "*.gif"));
            fileChooser.setTitle("Importar arquivo de imagem");
            File file = fileChooser.showOpenDialog(stage);
            if (file != null) {
                previousImportDir = file;
                Image img = new Image("file:" + file.getPath());
                if ((img.getWidth() != 0 && img.getHeight() != 0))
                    actionSetNewImageOnCanvas(img);

And the image is generate on another software, that are an sdk to acquire intraoral x-ray.

And the sdk code to save the image is that:

private void SaveImage(short[] data, int widht, int height)
        {
            try
            {
                Bitmap pic = new Bitmap(widht, height, System.Drawing.Imaging.PixelFormat.Format16bppGrayScale);

                Rectangle dimension = new Rectangle(0, 0, pic.Width, pic.Height);
                BitmapData picData = pic.LockBits(dimension, ImageLockMode.ReadWrite, pic.PixelFormat);

                IntPtr pixelStartAddress = picData.Scan0;

                //Marshal.Copy(data, 0, pixelStartAddress, data.Length);
                Marshal.Copy(data, 0, pixelStartAddress, data.Length);

                pic.UnlockBits(picData);


                //SaveBmp(pic, Path.Combine(Directory.GetCurrentDirectory(), "imagem"));

                SaveBmp(pic, "C:\\Users\\WIM\\Desktop\\teste\\teste\\teste.bmp");
                pic.Dispose();
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex);
            }
        }

        private static void SaveBmp(Bitmap bmp, string path)
        {
            Rectangle rect = new Rectangle(0, 0, bmp.Width, bmp.Height);

            BitmapData bitmapData = bmp.LockBits(rect, ImageLockMode.ReadOnly, bmp.PixelFormat);

            var pixelFormats = ConvertBmpPixelFormat(bmp.PixelFormat);

            BitmapSource source = BitmapSource.Create(bmp.Width,
                                                      bmp.Height,
                                                      bmp.HorizontalResolution,
                                                      bmp.VerticalResolution,
                                                      pixelFormats,
                                                      null,
                                                      bitmapData.Scan0,
                                                      bitmapData.Stride * bmp.Height,
                                                      bitmapData.Stride);

            bmp.UnlockBits(bitmapData);


            FileStream stream = new FileStream(path, FileMode.Create);

            TiffBitmapEncoder encoder = new TiffBitmapEncoder();

            encoder.Compression = TiffCompressOption.Zip;
            encoder.Frames.Add(BitmapFrame.Create(source));
            encoder.Save(stream);

            stream.Close();
        }


        private static System.Windows.Media.PixelFormat ConvertBmpPixelFormat(System.Drawing.Imaging.PixelFormat pixelformat)
        {
            System.Windows.Media.PixelFormat pixelFormats = System.Windows.Media.PixelFormats.Default;

            switch (pixelformat)
            {
                case System.Drawing.Imaging.PixelFormat.Format32bppArgb:
                    pixelFormats = PixelFormats.Bgr32;
                    break;

                case System.Drawing.Imaging.PixelFormat.Format8bppIndexed:
                    pixelFormats = PixelFormats.Gray8;
                    break;

                case System.Drawing.Imaging.PixelFormat.Format16bppGrayScale:
                    pixelFormats = PixelFormats.Gray16;
                    break;
            }

            return pixelFormats;
        }

How suggested I tried to use feredImage bufferedImage = ImageIO.read(file); instead of Image img = new Image("file:" + file.getPath());

But the object are null

As requested, thats the image I'm trying to load: https://shortest.link/KFQ (over 2 Megabytes)

Answer 1

The problem is that I'm using Java 8, so to load TIFF images we need a plugin.

Add these lines to your pom.xml:

<dependency>
   <groupId>com.github.jai-imageio</groupId>
   <artifactId>jai-imageio-core</artifactId>
   <version>1.4.0</version>
</dependency>

If you need to use a jar or other repositories see more in github

And on the code do these changes:

FileInputStream fis = new FileInputStream(file);
BufferedImage bufferedImage = ImageIO.read(fis);
System.out.println("Width: " + bufferedImage.getWidth());
Image img = SwingFXUtils.toFXImage(bufferedImage, null);