Image Steganography by Variable Embedding and Multiple Edge Detection Using Canny Operator

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This paper proposes a method for image steganography. According to Human Visual System, any variation in the edges shown in the images has a low probability of being perceived by the human eyes, thus data can be hidden in the pixel of the cover image. These edges can be detected by using sophisticated operators like canny edge detection operator. The gradient of the pixel of the image is determined and the image edges are detected by taking a threshold value of the gradient image. Here the authors go for multiple edge detection so that more number of pixels around the edge area is detected using the above method.