the Type or namespace name ‘ImageProcessing’ is missing

Question

The following is the code fOr Median Filter . Am getting Error as ---- the Type or namespace name ‘ImageProcessing’ does not exist in the namespace ‘System’(are you missing an assembly reference)?

private void medianToolStripMenuItem_Click(object sender, EventArgs e)

{

Bitmap img = new Bitmap(pictureBox1.Image);

pictureBox1.Image = img;

img = System.ImageProcessing.BitmapImage.MedianFilter(img);

pictureBox1.Image = (Image)img;

MessageBox.Show("Successfully Done");

}

How to resolve this error? Please help..

Vulpes · Answer

The project will be no help. I'd need to watch the video. However, as I haven't really got time for that, I've got a better idea. Use the MedianFilter method in this article instead: http://softwarebydefault.com/2013/05/18/image-median-filter/ Rather than use it as an extension method, you could use it as an ordinary static method instead: public static Bitmap MedianFilter(Bitmap sourceBitmap, // removed 'this' int matrixSize, int bias = 0, bool grayscale = false) { BitmapData sourceData = sourceBitmap.LockBits(new Rectangle (0, 0, sourceBitmap.Width, sourceBitmap.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb); byte[] pixelBuffer = new byte[sourceData.Stride * sourceData.Height]; byte[] resultBuffer = new byte[sourceData.Stride * sourceData.Height]; Marshal.Copy(sourceData.Scan0, pixelBuffer, 0, pixelBuffer.Length); sourceBitmap.UnlockBits(sourceData); if (grayscale == true) { float rgb = 0; for (int k = 0; k { rgb = pixelBuffer[k] * 0.11f; rgb += pixelBuffer[k + 1] * 0.59f; rgb += pixelBuffer[k + 2] * 0.3f; pixelBuffer[k] = (byte )rgb; pixelBuffer[k + 1] = pixelBuffer[k]; pixelBuffer[k + 2] = pixelBuffer[k]; pixelBuffer[k + 3] = 255; } } int filterOffset = (matrixSize - 1) / 2; int calcOffset = 0; int byteOffset = 0; List neighbourPixels = new List (); byte[] middlePixel; for (int offsetY = filterOffset; offsetY sourceBitmap.Height - filterOffset; offsetY++) { for (int offsetX = filterOffset; offsetX sourceBitmap.Width - filterOffset; offsetX++) { byteOffset = offsetY * sourceData.Stride + offsetX * 4; neighbourPixels.Clear(); for (int filterY = -filterOffset; filterY { for (int filterX = -filterOffset; filterX { calcOffset = byteOffset + (filterX * 4) + (filterY * sourceData.Stride); neighbourPixels.Add(BitConverter.ToInt32( pixelBuffer, calcOffset)); } } neighbourPixels.Sort(); middlePixel = BitConverter.GetBytes( neighbourPixels[filterOffset]); resultBuffer[byteOffset] = middlePixel[0]; resultBuffer[byteOffset + 1] = middlePixel[1]; resultBuffer[byteOffset + 2] = middlePixel[2]; resultBuffer[byteOffset + 3] = middlePixel[3]; } } Bitmap resultBitmap = new Bitmap(sourceBitmap.Width, sourceBitmap.Height); BitmapData resultData = resultBitmap.LockBits(new Rectangle (0, 0, resultBitmap.Width, resultBitmap.Height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb); Marshal.Copy(resultBuffer, 0, resultData.Scan0, resultBuffer.Length); resultBitmap.UnlockBits(resultData); return resultBitmap; } Just paste this method into your current class and put these using directives at the top of the file unless they've been added already: using System.Runtime.InteropSerivces; using System.Drawing.Imaging; Finally, change this line in your code: img = System.ImageProcessing.BitmapImage.MedianFilter(img); to this: img = MedianFilter(img, 11);

Vulpes · Answer

Can you post a link to the page where you found this code. I'll check it out and see if I can determine where this class has come from.

Vulpes · Answer

The only BitmapImage class I can find in the .NET framework is this one in the System.Windows.Media.Imaging namespace: http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.bitmapimage(v=vs.95).aspx However, it doesn't have a MedianFilter method. Therefore, I'd imagine that it must be a class in a third party graphics library. Assuming you've copied this code from somewhere, I'd go back to the source and see if you can figure out where this class has come from.

Vulpes · Answer

That's a relief :) As a non-medical person, I'm pleased I didn't have to watch the video!

Abinaya · Answer

Thank you very much sir.. Its working:) The video link is https://www.youtube.com/watch?v=ErUzYw2Uvto

Abinaya · Answer

actually i found it in a video.. then copied code from video i copied to editor. This is my email id: abinayas09@gmail.com. If i get ur mail, i can send u whole project. Thanks in advance

Abinaya · Answer

sir now what should i do? while surfing i got this code. Please help me out.

Princy Gupta · Answer

try adding the namespace using System.Drawing;