Пример #1
0
 public static sitk.Image ReadImage(string fileName)
 {
     sitk.ImageFileReader imageFileReader = new sitk.ImageFileReader();
     imageFileReader.SetFileName(fileName);
     sitk.Image image = imageFileReader.Execute();
     return(image);
 }
 /// <summary>
 /// Reads an ITK image from file, specifying the output pixel type.
 /// </summary>
 /// <param name="file">filename</param>
 /// <param name="outputType">output pixel type</param>
 /// <returns>image</returns>
 public static sitk.Image ReadITKImageFromFile(string file, sitk.PixelIDValueEnum outputType)
 {
     sitk.ImageFileReader reader = new sitk.ImageFileReader();
     reader.SetFileName(file);
     reader.SetOutputPixelType(outputType);
     return(reader.Execute());
 }
        /// <summary>
        /// Reads an ITK image as a grayscale image.
        /// </summary>
        /// <param name="file">filename</param>
        /// <param name="outputType">output datatype</param>
        /// <param name="channel">channel to extract</param>
        /// <returns>grayscale ITK image</returns>
        public static sitk.Image ReadITKImageAsGrayscaleFromFile(string file, sitk.PixelIDValueEnum outputType, ColorChannel channel)
        {
            sitk.ImageFileReader reader = new sitk.ImageFileReader();
            reader.SetFileName(file);
            reader.SetOutputPixelType(outputType);
            sitk.Image temp = reader.Execute();

            sitk.Image result = null;
            sitk.VectorIndexSelectionCastImageFilter rgbVector = new sitk.VectorIndexSelectionCastImageFilter();
            switch (channel)
            {
            case ColorChannel.R: result = rgbVector.Execute(temp, 0, sitk.PixelIDValueEnum.sitkFloat32); break;

            case ColorChannel.G: result = rgbVector.Execute(temp, 1, sitk.PixelIDValueEnum.sitkFloat32); break;

            case ColorChannel.B: result = rgbVector.Execute(temp, 2, sitk.PixelIDValueEnum.sitkFloat32); break;
            }

            return(result);
        }
        public void ProcessRequest(HttpContext context)
        {
            // image ID, brightness and contrast value
            Int32  iID, iBVal, iRot, iNoFiles;
            Double dCVal;
            String sPath;

            // response type
            context.Response.ContentType = "image/png";

            // get and convert image parameters
            if (context.Request.QueryString["NqC3ke"] != null)  // ID
            {
                iID = Convert.ToInt32(context.Request.QueryString["NqC3ke"]);
            }
            else
            {
                throw new ArgumentException("No image id specified");
            }

            if (context.Request.QueryString["tXt9X3"] != null)  // brightness
            {
                iBVal = Convert.ToInt32(context.Request.QueryString["tXt9X3"]);
            }
            else
            {
                throw new ArgumentException("No image brightness specified");
            }

            if (context.Request.QueryString["XwjRGm"] != null)  // contrast
            {
                dCVal = Convert.ToDouble(context.Request.QueryString["XwjRGm"]);
            }
            else
            {
                throw new ArgumentException("No image contrast specified");
            }

            if (context.Request.QueryString["WkYTCe"] != null)  // path
            {
                string obscuredPath   = Convert.ToString(context.Request.QueryString["WkYTCe"]);
                string unobscuredPath = "";

                // old obfuscation
                //for (int z = 0; z < obscuredPath.Length; z++)
                //{
                //    int add = Constant.ceasarOdd;

                //    if (z % 2 == 0)
                //    {
                //        add =  Constant.ceasarEven;
                //    }
                //    char c = (char)(obscuredPath[z] - add);
                //    unobscuredPath += c.ToString();

                //}

                // new obfuscation
                string allowedChars = Constant.allowedCharacters;

                for (int p = 0; p < obscuredPath.Length; p++)
                {
                    for (int c = 0; c < allowedChars.Length; c++)
                    {
                        if (obscuredPath[p] == allowedChars[c])
                        { // character is allowed
                            int add = Constant.ceasarOdd;
                            if (p % 2 == 0)
                            {
                                add = Constant.ceasarEven;
                            }

                            // remove unneccessary loops
                            add = add % (allowedChars.Length - 1);

                            int shift = c - add;

                            if (shift > (allowedChars.Length - 1))
                            {
                                shift = shift - (allowedChars.Length - 1);
                            }
                            else if ((shift) < 0)
                            {
                                shift = shift + (allowedChars.Length - 1);
                            }

                            char character = allowedChars[shift];


                            unobscuredPath += character.ToString();

                            break;
                        }
                    }
                }



                //Debug.Print("deobfuscation\t\t" + obscuredPath + "  ->  " + unobscuredPath);

                sPath = unobscuredPath;
            }
            else
            {
                sPath = "";
            }

            if (context.Request.QueryString["Hsfke2"] != null)  // rotate
            {
                iRot = Convert.ToInt32(context.Request.QueryString["Hsfke2"]);
            }
            else
            {
                iRot = 0;
            }

            if (context.Request.QueryString["yAR8st"] != null)  // length
            {
                iNoFiles = Convert.ToInt32(context.Request.QueryString["yAR8st"]);
            }
            else
            {
                iNoFiles = 1;
            }

            // load image in byte array "bmVal"
            //var bOld = false;
            byte[] bmVal;
            int    iWidth;
            int    iHeight;
            int    iDepth;

            itk.simple.Image itkImage;

            if (!File.Exists(sPath))
            {
                // file was not found
            }

            try
            {
                itkImage = SimpleITK.ReadImage(sPath, PixelIDValueEnum.sitkFloat32);
            }
            catch (System.StackOverflowException)
            {
                itk.simple.ImageFileReader reader = new itk.simple.ImageFileReader();
                reader.SetFileName(sPath);
                itkImage = reader.Execute();
            }

            // get image direction
            var iDir = itkImage.GetDirection();

            // get spacing
            VectorDouble dSpacing = itkImage.GetSpacing();

            // get size and number of dimension
            VectorUInt32 iSize = itkImage.GetSize();
            int          len   = 1;

            for (int iDim = 0; iDim < itkImage.GetDimension(); iDim++)
            {
                len *= (int)iSize[iDim];
            }
            iWidth  = unchecked ((int)iSize[0]);
            iHeight = unchecked ((int)iSize[1]);
            iDepth  = unchecked ((int)iSize[2]);

            // convert mm->dpi
            float fResolutionX = System.Convert.ToSingle(System.Convert.ToDouble(iWidth) * 25.4 / dSpacing[0]);
            float fResolutionY = System.Convert.ToSingle(System.Convert.ToDouble(iHeight) * 25.4 / dSpacing[1]);

            // 2D image size
            int iLength = iWidth * iHeight;

            // copy buffer to new array
            IntPtr ipBuffer = itkImage.GetBufferAsFloat();

            float[] fArray = new float[iLength];

            // no negative indices
            if (iID < 0)
            {
                iID = 0;
            }

            // multiple DICOM files
            int iOffset = 0;

            if (iNoFiles > 1)
            {
                if (iID >= (iNoFiles - 1))
                {
                    iID = iNoFiles - 1;
                }
                iOffset = 0;
            }

            else if (iNoFiles == 1)
            {
                // one DICOM file
                if (iDepth == 1)
                {
                    iID     = 1;
                    iOffset = 0;
                }

                // one 3D MHD file
                else if (iDepth > 1)
                {
                    if (iID > (iDepth - 1))
                    {
                        iID = iDepth - 1;
                    }
                    iOffset = (iID - 1) * iLength;
                }
            }

            // new pointer to data (due to offset)
            Marshal.Copy(new IntPtr(ipBuffer.ToInt64() + sizeof(float) * iOffset), fArray, 0, iLength);

            // convert floating point to 8 bit integer values - range:0 - 255
            float fMax = fArray.Max();
            float fMin = fArray.Min();

            bmVal = new byte[iWidth * iHeight];
            for (int iI = 0; iI < iLength; iI++)
            {
                var tmp = (float)(((fArray[iI] - fMin) / (fMax - fMin) * 255) + iBVal) * (float)dCVal;
                if (tmp > 255)
                {
                    tmp = 255;
                }
                if (tmp < 0)
                {
                    tmp = 0;
                }
                bmVal[iI] = (byte)tmp;
            }
            Bitmap bmOutput = fCreateBitmap(bmVal, new int[] { iWidth, iHeight }, new float[] { fResolutionX, fResolutionY });

            // rotate image and flip in X direction due to different image orientation convention

            // corrects *.mhd orientation

            List <String> lsExtensions = new List <String> {
                ".mhd", ".MHD"
            };

            foreach (var ext in lsExtensions)
            {
                if (sPath.EndsWith(ext))
                {                                                // *.mhd files have a different orientation (compared to *.ima)
                    bmOutput.RotateFlip(RotateFlipType.Rotate90FlipNone);
                }
            }

            switch (iRot)
            {
            case 0:
                bmOutput.RotateFlip(RotateFlipType.RotateNoneFlipX);
                break;

            case 90:
                bmOutput.RotateFlip(RotateFlipType.Rotate90FlipX);
                break;

            case 180:
                bmOutput.RotateFlip(RotateFlipType.Rotate180FlipX);
                break;

            case 270:
                bmOutput.RotateFlip(RotateFlipType.Rotate270FlipX);
                break;

            default:
                break;
            }

            // save new image to response stream
            bmOutput.Save(context.Response.OutputStream, ImageFormat.Png);
            bmOutput.Dispose();
        }