public int CompareBitToBit(Watermark watermark) { int equalBits = 0; int comparisonLength = Math.Min(this.Length, watermark.Length); for (int i = 0; i < comparisonLength; i++) { if (watermark._bits[i] == this._bits[i]) { equalBits++; } } return(equalBits); }
private Watermark UnTransformWatermark(Watermark watermark) { Watermark newWatermark = new Watermark(watermark.Length); for (int i = 0; i < watermark.Length; i++) { if (watermark[i] == -1) { newWatermark[i] = 0; } else { newWatermark[i] = 1; } } return(newWatermark); }
public DoubleImage KIMextract(DoubleImage initialImage, DoubleImage changedImage, int widthWatermark, int heigthWatermark) { Watermark watermark = KIMextractComponent(initialImage, changedImage, widthWatermark, heigthWatermark, DoubleImage.ColorComponent.Blue); if (p < widthWatermark * heigthWatermark) { int startIndex = p; watermark = watermark.Append(KIMextractComponent(initialImage, changedImage, widthWatermark, heigthWatermark, DoubleImage.ColorComponent.Red), startIndex); } if (p < widthWatermark * heigthWatermark) { int startIndex = p; watermark = watermark.Append(KIMextractComponent(initialImage, changedImage, widthWatermark, heigthWatermark, DoubleImage.ColorComponent.Green), startIndex); } p = 0; return(watermark.ToDoubleImage(widthWatermark, heigthWatermark)); }
public DoubleImage KIMembed(DoubleImage image, Watermark initialWatermark) { DoubleImage copy = image.Copy(); int maxWatermarkLength = GetMaxWatermarkLength(copy); if (maxWatermarkLength < initialWatermark.Length) { throw new Exception("Размер ЦВЗ слишком большой для данного изображения. Проверьте, максимально возможный размер ЦВЗ."); } DoubleImage result = KIMembedComponent(image, initialWatermark, DoubleImage.ColorComponent.Blue); if (p < initialWatermark.Length) { result = KIMembedComponent(result, initialWatermark, DoubleImage.ColorComponent.Red); } if (p < initialWatermark.Length) { result = KIMembedComponent(result, initialWatermark, DoubleImage.ColorComponent.Green); } p = 0; return(result); }
/*public DoubleImage KIMembed(DoubleImage image, Watermark initialWatermark) * { * DoubleImage copy = image.Copy(); * int maxWatermarkLength = GetOptimalWatermarkLength(copy); * if (maxWatermarkLength < initialWatermark.Length) * throw new Exception("Watermark length is too big to embed it in the image."); * * DoubleImage result = KIMembedComponent(image, initialWatermark, DoubleImage.ColorComponent.Blue); * if (p < initialWatermark.Length) * result = KIMembedComponent(result, initialWatermark, DoubleImage.ColorComponent.Red); * if (p < initialWatermark.Length) * result = KIMembedComponent(result, initialWatermark, DoubleImage.ColorComponent.Green); * p = 0; * return result; * }*/ private DoubleImage KIMembedComponent(DoubleImage image, Watermark initialWatermark, DoubleImage.ColorComponent colorComponent) { // Get blue component from image double[,] blueComponent = image.GetColorComponent(colorComponent); // Transfrom blue component with wavelet transformation double[,] waveletTransformedComponent = Wavelet.Transform(blueComponent, 3); // Get coefficients of transformation double[,] approx3 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Approximation, 3); double[,] detailHor3 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 3); double[,] detailVert3 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 3); double[,] detailDiag3 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 3); double[,] detailHor2 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 2); double[,] detailVert2 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 2); double[,] detailDiag2 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 2); double[,] detailHor1 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 1); double[,] detailVert1 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 1); double[,] detailDiag1 = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 1); // Get thresholds double threshold1 = Threshold.GetThreshold(detailHor1, detailVert1, detailDiag1); double threshold2 = Threshold.GetThreshold(detailHor2, detailVert2, detailDiag2); double threshold3 = Threshold.GetThreshold(detailHor3, detailVert3, detailDiag3, approx3); Watermark watermark = TransformWatermark(initialWatermark); // Embed watermark into coefficients //int p = 0; p = EmbedInCoef(coefApprox, ref approx3, threshold3, watermark, p); p = EmbedInCoef(coef3Level, ref detailHor3, threshold3, watermark, p); p = EmbedInCoef(coef3Level, ref detailVert3, threshold3, watermark, p); p = EmbedInCoef(coef3Level, ref detailDiag3, threshold3, watermark, p); p = EmbedInCoef(coef2Level, ref detailHor2, threshold2, watermark, p); p = EmbedInCoef(coef2Level, ref detailVert2, threshold2, watermark, p); p = EmbedInCoef(coef2Level, ref detailDiag2, threshold2, watermark, p); p = EmbedInCoef(coef1Level, ref detailHor1, threshold1, watermark, p); p = EmbedInCoef(coef1Level, ref detailVert1, threshold1, watermark, p); p = EmbedInCoef(coef1Level, ref detailDiag1, threshold1, watermark, p); Console.WriteLine("watermark length {0}", watermark.Length); Console.WriteLine("p {0}", p); // Restore blue component from coefficients double[,] componentWithWatermark = new double[blueComponent.GetLength(0), blueComponent.GetLength(1)]; componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Approximation, 3, approx3); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Horizontal, 3, detailHor3); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Vertical, 3, detailVert3); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Diagonal, 3, detailDiag3); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Horizontal, 2, detailHor2); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Vertical, 2, detailVert2); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Diagonal, 2, detailDiag2); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Horizontal, 1, detailHor1); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Vertical, 1, detailVert1); componentWithWatermark = Wavelet.SetCoefficient(componentWithWatermark, Wavelet.Coefficients.Diagonal, 1, detailDiag1); double[,] untrasformedComponent = Wavelet.Untransfrom(componentWithWatermark, 3); // Embed blue component into initial image image = image.UpdateColorComponent(colorComponent, untrasformedComponent); return(image); }
public DoubleImage KIMembed(DoubleImage image, Watermark initialWatermark) { DoubleImage result = KIMembedComponent(image, initialWatermark, DoubleImage.ColorComponent.Green); return(result); }
private int ExtractFromCoef(double constCoefficient, double[,] initialCoefficients, double[,] changedCoefficients, double treshold, int p, int watermarkSize, ref Watermark watermark) { for (int i = 0; i < initialCoefficients.GetLength(0); i++) { if (p >= watermarkSize) { break; } for (int j = 0; j < initialCoefficients.GetLength(1); j++) { if (p >= watermarkSize) { break; } if (initialCoefficients[i, j] > treshold) { double initial = initialCoefficients[i, j]; double changed = changedCoefficients[i, j]; int watermarkBit = Convert.ToInt32(Math.Round((changed - initial) / (constCoefficient * initial))); watermark[p] = watermarkBit; p++; } } } return(p); }
private Watermark KIMextractComponent(DoubleImage initialImage, DoubleImage changedImage, int widthWatermark, int heigthWatermark, DoubleImage.ColorComponent colorComponent) { // Get blue component from changed image double[,] blueComponentChanged = changedImage.GetColorComponent(colorComponent); // Transfrom blue component of changed image with wavelet transformation double[,] waveletTransformedChangedComponent = Wavelet.Transform(blueComponentChanged, 3); // Get coefficients of transformation double[,] approx3 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Approximation, 3); double[,] detailHor3 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Horizontal, 3); double[,] detailVert3 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Vertical, 3); double[,] detailDiag3 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Diagonal, 3); double[,] detailHor2 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Horizontal, 2); double[,] detailVert2 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Vertical, 2); double[,] detailDiag2 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Diagonal, 2); double[,] detailHor1 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Horizontal, 1); double[,] detailVert1 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Vertical, 1); double[,] detailDiag1 = Wavelet.GetCoefficient(waveletTransformedChangedComponent, Wavelet.Coefficients.Diagonal, 1); // Get blue component from initial image double[,] blueComponentInitial = initialImage.GetColorComponent(colorComponent); // Transfrom blue component of initial image with wavelet transformation double[,] waveletTransformedComponent = Wavelet.Transform(blueComponentInitial, 3); // Get coefficients of transformation double[,] approx3Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Approximation, 3); double[,] detailHor3Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 3); double[,] detailVert3Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 3); double[,] detailDiag3Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 3); double[,] detailHor2Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 2); double[,] detailVert2Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 2); double[,] detailDiag2Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 2); double[,] detailHor1Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Horizontal, 1); double[,] detailVert1Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Vertical, 1); double[,] detailDiag1Initial = Wavelet.GetCoefficient(waveletTransformedComponent, Wavelet.Coefficients.Diagonal, 1); // Get thresholds from initial image double threshold1 = Threshold.GetThreshold(detailHor1Initial, detailVert1Initial, detailDiag1Initial); double threshold2 = Threshold.GetThreshold(detailHor2Initial, detailVert2Initial, detailDiag2Initial); double threshold3 = Threshold.GetThreshold(detailHor3Initial, detailVert3Initial, detailDiag3Initial, approx3Initial); int watermarkSize = widthWatermark * heigthWatermark; Watermark watermark = new Watermark(watermarkSize); // Extract watermark from coefficients //int p = 0; p = ExtractFromCoef(coefApprox, approx3Initial, approx3, threshold3, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef3Level, detailHor3Initial, detailHor3, threshold3, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef3Level, detailVert3Initial, detailVert3, threshold3, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef3Level, detailDiag3Initial, detailDiag3, threshold3, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef2Level, detailHor2Initial, detailHor2, threshold2, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef2Level, detailVert2Initial, detailVert2, threshold2, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef2Level, detailDiag2Initial, detailDiag2, threshold2, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef1Level, detailHor1Initial, detailHor1, threshold1, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef1Level, detailVert1Initial, detailVert1, threshold1, p, watermarkSize, ref watermark); p = ExtractFromCoef(coef1Level, detailDiag1Initial, detailDiag1, threshold1, p, watermarkSize, ref watermark); watermark = UnTransformWatermark(watermark); return(watermark); //DoubleImage watermarkImage = watermark.ToDoubleImage(widthWatermark, heigthWatermark); //return watermarkImage; }
private int EmbedInCoef(double constCoefficient, ref double[,] coefficients, double treshold, Watermark watermark, int p) { for (int i = 0; i < coefficients.GetLength(0); i++) { if (p >= watermark.Length) { break; } for (int j = 0; j < coefficients.GetLength(1); j++) { if (p >= watermark.Length) { break; } if (coefficients[i, j] > treshold) { double coefficien = coefficients[i, j]; coefficients[i, j] = coefficients[i, j] + constCoefficient * coefficients[i, j] * watermark[p]; p++; } } } return(p); }