Extract image from PDF using itextsharp

Question

I am trying to extract all the images from a pdf using itextsharp but can\'t seem to overcome this one hurdle.

The error occures on the line System.Drawing.I

Answer 1

This works for me and I think it's a simple solution:

Write a custom RenderListener and implement its RenderImage method, something like this

    public void RenderImage(ImageRenderInfo info)
    {
        PdfImageObject image = info.GetImage();
        Parser.Matrix matrix = info.GetImageCTM();
        var fileType = image.GetFileType();
        ImageFormat format;
        switch (fileType)
        {//you may add more types here
            case "jpg":
            case "jpeg":
                format = ImageFormat.Jpeg;
                break;
            case "pnt":
                format = ImageFormat.Png;
                break;
            case "bmp":
                format = ImageFormat.Bmp;
                break;
            case "tiff":
                format = ImageFormat.Tiff;
                break;
            case "gif":
                format = ImageFormat.Gif;
                break;
            default:
                format = ImageFormat.Jpeg;
                break;
        }

        var pic = image.GetDrawingImage();
        var x = matrix[Parser.Matrix.I31];
        var y = matrix[Parser.Matrix.I32];
        var width = matrix[Parser.Matrix.I11];
        var height = matrix[Parser.Matrix.I22];
        if (x <  && y < )
        {
            return;//ignore these images
        }

        pic.Save(, format);
}