' Opens JPEG2000 file and gets its image by parts.
Public Shared Function GetJpeg2000ImageByParts(jpeg2000Filename As String) As Vintasoft.Imaging.VintasoftImage
    ' open an existing JPEG2000 file
    Using file As New Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File(jpeg2000Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read)
        ' get JPEG2000 page
        Dim page As Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000Page = file.Page

        ' get page dimensions and pixel format
        Dim imageWidth As Integer = page.Width
        Dim imageHeight As Integer = page.Height
        Dim palette As Vintasoft.Imaging.Palette = If(page.Palette IsNot Nothing, page.Palette, New Vintasoft.Imaging.Palette())
        Dim imageInfo As New Vintasoft.Imaging.Codecs.Decoders.ImageInfo(imageWidth, imageHeight, page.BitsPerPixel, palette, page.Resolution)
        Dim pixelFormat As Vintasoft.Imaging.PixelFormat = imageInfo.PixelFormat

        ' get tiles grid of the page
        Dim tilesGrid As System.Drawing.Rectangle() = page.GetTileGrid()

        ' get tiles count
        Dim tileCount As Integer = tilesGrid.Length

        ' get number of wavelet levels
        Dim waveletLevel As Integer = page.WaveletLevels

        ' create a VintasoftImage object
        Dim resultImage As New Vintasoft.Imaging.VintasoftImage(imageWidth, imageHeight, pixelFormat)

        ' for each tile in page
        For i As Integer = 0 To tileCount - 1
            ' get current rectangle
            Dim tileRectangle As System.Drawing.Rectangle = tilesGrid(i)

            ' get current rectangle location
            Dim position As System.Drawing.Point = tileRectangle.Location

            ' get image of current tile
            Using tile As Vintasoft.Imaging.VintasoftImage = page.GetTileImage(i, waveletLevel, Nothing)
                ' overlay tile on result image
                Dim overlayCommand As New Vintasoft.Imaging.ImageProcessing.OverlayCommand(tile, position)
                overlayCommand.ExecuteInPlace(resultImage)
            End Using
        Next

        Return resultImage
    End Using
End Function

// Opens JPEG2000 file and gets its image by parts.
public static Vintasoft.Imaging.VintasoftImage GetJpeg2000ImageByParts(string jpeg2000Filename)
{
    // open an existing JPEG2000 file
    using (Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File file =
        new Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000File(
            jpeg2000Filename, System.IO.FileMode.Open, System.IO.FileAccess.Read))
    {
        // get JPEG2000 page
        Vintasoft.Imaging.Codecs.ImageFiles.Jpeg2000.Jpeg2000Page page = file.Page;

        // get page dimensions and pixel format
        int imageWidth = page.Width;
        int imageHeight = page.Height;
        Vintasoft.Imaging.Palette palette = page.Palette != null ? page.Palette : new Vintasoft.Imaging.Palette();
        Vintasoft.Imaging.Codecs.Decoders.ImageInfo imageInfo =
            new Vintasoft.Imaging.Codecs.Decoders.ImageInfo(
                imageWidth,
                imageHeight,
                page.BitsPerPixel,
                palette,
                page.Resolution);
        Vintasoft.Imaging.PixelFormat pixelFormat = imageInfo.PixelFormat;

        // get tiles grid of the page
        System.Drawing.Rectangle[] tilesGrid = page.GetTileGrid();

        // get tiles count
        int tileCount = tilesGrid.Length;

        // get number of wavelet levels
        int waveletLevel = page.WaveletLevels;

        // create a VintasoftImage object
        Vintasoft.Imaging.VintasoftImage resultImage =
            new Vintasoft.Imaging.VintasoftImage(imageWidth, imageHeight, pixelFormat);

        // for each tile in page
        for (int i = 0; i < tileCount; i++)
        {
            // get current rectangle
            System.Drawing.Rectangle tileRectangle = tilesGrid[i];

            // get current rectangle location
            System.Drawing.Point position = tileRectangle.Location;

            // get image of current tile
            using (Vintasoft.Imaging.VintasoftImage tile = page.GetTileImage(i, waveletLevel, null))
            {
                // overlay tile on result image
                Vintasoft.Imaging.ImageProcessing.OverlayCommand overlayCommand =
                    new Vintasoft.Imaging.ImageProcessing.OverlayCommand(tile, position);
                overlayCommand.ExecuteInPlace(resultImage);
            }
        }

        return resultImage;
    }
}