Discrete wavelet transform-based color image watermarking using uncorrelated color space and artificial bee colony

Abstract

The exponential growth in electronic data over internet have increased the demand of a robust and high quality watermarking method for authentication and copyright protection. In general, the existing digital image watermarking methods embed the binary or gray scale watermark into the host image although most multimedia images are available in color. Moreover, available digital image watermarking methods generally use the correlated color spaces which impose the limitations to researchers for using only one color component at a time for embedding the watermark. Therefore, in this paper, a novel discrete wavelet transform (DWT) based color image watermarking method has been proposed which embeds the color watermark into host image using uncorrelated color space (UCS) and artificial bee colony (ABC) method. The results show that proposed method outperforms other existing methods against the various signal processing attacks.

Combined DWT-DISB based image watermarking optimized for decision making problems

“…In this research, we aim to combine the discrete wavelet transform (DWT) and the relatively new dual intermediate significant bit (DISB) [11]. The combination of these two techniques would be aimed at enhancing the quality and the resilient of the watermarked image [10]. The combination of the DISB would alter the intermediate significant bits for the low-frequency approximation in the DWT domain for embedding the watermark in the image [11].…”

“…The embedding was completed for all the bit-planes using the bias values (X), which was vital for every embedding, quality, and resilience of the watermarked image [11]. The robustness of the DISB method was enhanced by applying the data encryption standard (DES) for securing the shared key [10]. The DWT technique was used to determine the number of alterations to be applied to be able to scramble the data and secure the data in the image [5].…”

“…The selection of the coefficients is reliant on the perpetual criteria and the key instrumented permutation to increase the security and the robustness of the approaches used. Inserting of the watermark can be accomplished on an image independent or dependent additive manner or a variant of substitution mechanism [10]. Prior to divulging into the details of the proposed watermarking model it is vital to understand the bit-plane that characterizes the image.…”

Robustness and Imperceptibility Enhancement in Watermarked Images by Color Transformation

“…The SVD applies to host and watermark image and the linear combination of their singular values and calculated strength factor replaced by the singular value of HL sub-band. The color space used in [7] is Uncorrelated Color Space (UCS). In this paper, both input images convert to UCS and apply three-level DWT on each of them.…”

Night Vision Image De-noising of Apple Harvesting Robots Based on the Wavelet Fuzzy Threshold

“…The wavelet threshold de-noising method is commonly used [9]. One of the wavelet-based methods is called ProbShrink.…”