ImageResizer.Plugins.RedEye.RedEyeFilter Class Reference

Turns color images into grayscale images using a specialized filter that makes the red eyes stand out brightly against their background.. More...

Inheritance diagram for ImageResizer.Plugins.RedEye.RedEyeFilter:

Collaboration diagram for ImageResizer.Plugins.RedEye.RedEyeFilter:

Public Member Functions
	RedEyeFilter ()
	Initializes a new instance of the RedEyeFilter class. More...
	RedEyeFilter (short alg)
	Initializes a new instance of the RedEyeFilter class. More...

Protected Member Functions
override unsafe void	ProcessFilter (UnmanagedImage sourceData, UnmanagedImage destinationData)
	Process the filter on the specified image. More...

Properties
override Dictionary < PixelFormat, PixelFormat >	FormatTranslations [get]
	Format translations dictionary. More...
short	Algorithm [get, set]

Detailed Description

Turns color images into grayscale images using a specialized filter that makes the red eyes stand out brightly against their background..

Definition at line 15 of file RedEyeFilter.cs.

Constructor & Destructor Documentation

ImageResizer.Plugins.RedEye.RedEyeFilter.RedEyeFilter ( )

inline

Initializes a new instance of the RedEyeFilter class.

Definition at line 32 of file RedEyeFilter.cs.

                              {
            // initialize format translation dictionary
            formatTranslations[PixelFormat.Format24bppRgb] = PixelFormat.Format8bppIndexed;
            formatTranslations[PixelFormat.Format32bppRgb] = PixelFormat.Format8bppIndexed;
            formatTranslations[PixelFormat.Format32bppArgb] = PixelFormat.Format8bppIndexed;
            Algorithm = 2;
        }

ImageResizer.Plugins.RedEye.RedEyeFilter.RedEyeFilter ( short  alg )

inline

Initializes a new instance of the RedEyeFilter class.

Parameters

alg	The algorithm to use for filtering the image.

Definition at line 44 of file RedEyeFilter.cs.

            : this() {
            this.Algorithm = alg;
        }

Member Function Documentation

override unsafe void ImageResizer.Plugins.RedEye.RedEyeFilter.ProcessFilter ( UnmanagedImage  sourceData, UnmanagedImage  destinationData  )

inlineprotected

Process the filter on the specified image.

Parameters

sourceData	Source image data.
destinationData	Destination image data.

Definition at line 54 of file RedEyeFilter.cs.

                                                                                                                {
            // get width and height
            int width = sourceData.Width;
            int height = sourceData.Height;

            int pixelSize =   System.Drawing.Image.GetPixelFormatSize(sourceData.PixelFormat) / 8;
            int sum;

            var algorithm = Algorithm;

            if (pixelSize <= 4) {
                int srcOffset = sourceData.Stride - width * pixelSize;
                int dstOffset = destinationData.Stride - width;

                // do the job
                byte* src = (byte*)sourceData.ImageData.ToPointer();
                byte* dst = (byte*)destinationData.ImageData.ToPointer();

                for (int y = 0; y < height; y++) {
                    for (int x = 0; x < width; x++, src += pixelSize, dst++) {
                        if (src[RGB.R] == 0) continue;
                        if (algorithm == 0) {
                            //held
                            *dst = (byte)Math.Max(src[RGB.R] - Math.Min(src[RGB.G], src[RGB.B]), 0);
                        } else if (algorithm == 1) {
                            //normalized r channel
                            sum = (src[RGB.R] + src[RGB.G] + src[RGB.B]);
                            *dst = (sum != 0) ? (byte)(255 * src[RGB.R] / sum) : (byte)0;
                        } else if (algorithm == 2) {
                            //Smolka
                            *dst = src[RGB.R] == 0 ? (byte)0 : (byte)Math.Min(255, Math.Max(0, ((float)(src[RGB.R] - Math.Max(src[RGB.G], src[RGB.B])) * 255.0F / (float)src[RGB.R])));
                        } else if (algorithm == 3) {
                            //GS
                            *dst = (byte)Math.Pow((Math.Max(0, (src[RGB.R] * 2 - src[RGB.G] - src[RGB.B]) / src[RGB.R])), 2);

                        } else if (algorithm == 4) {
                            //Gabautz
                            *dst = (byte)Math.Min(255, (src[RGB.R] * src[RGB.R] / (src[RGB.G] * src[RGB.G] + src[RGB.B] * src[RGB.B] + 14)));
                        }
                    }
                    src += srcOffset;
                    dst += dstOffset;
                }
            } else throw new NotImplementedException();
        }

Property Documentation

override Dictionary<PixelFormat, PixelFormat> ImageResizer.Plugins.RedEye.RedEyeFilter.FormatTranslations

get

Format translations dictionary.

Definition at line 23 of file RedEyeFilter.cs.

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The documentation for this class was generated from the following file:

• C:/Users/nathanael/Documents/resizer/Plugins/RedEye/RedEyeFilter.cs