Embedding Color Watermarks in Color Images

Chou, Chun-Hsien; Wu, Tung-Lin

doi:10.1155/s1110865703211227

Cited by 53 publications

(43 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From Figure 11, it is visualized that the proposed method and Su et al 23 have highest NC values (1.0) for all extracted watermarks and hence outperforms the method of Chou and Wu 21 . The columns of Figure 11 show extracted watermarks from considered watermarked images and first three rows show the extraction of RTU logo while last three show extraction of aeroplane image using the proposed and considered methods of watermarking.…”

Section: Resultsmentioning

confidence: 97%

“…As per our best knowledge this is the first inline work to use the UCS along with ABC for effective color image watermarking method. The performance of the proposed method has been measured in terms of quality and robustness against different signal processing attacks and results are compared with the work of Chou and Wu 21 and Su et al 23 . The results validate that the proposed method is bet- ter than other methods for all the considered parameters except slight decay in JPEG compression and rotation attacks as compared to Su et al 23 .…”

Section: Resultsmentioning

confidence: 99%

“…The results obtained from the proposed method are compared with the methods of Chou and Wu 21 and Su et al 23 who also embedded the color watermark images into the color host images. To compare these methods, quality and robustness parameters are considered.…”

Section: Methods Validationmentioning

confidence: 99%

See 2 more Smart Citations

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

Gupta¹,

Parmar

Gupta

et al. 2015

IJCIS

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

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

Gupta¹,

Parmar

Gupta

et al. 2015

IJCIS

View full text Add to dashboard Cite

show abstract

“…That is, the locus of colors that are perceptually indistinguishable from a particular color forms a sphere around that color's coordinate with radius of JNCD. In Chou and Wu (2003), the perceptually lossless color quantization based on the fixed JNCD is simply designed to achieve the transparent watermarking scheme, where watermarks are embedded by modifying quantization indices of color pixels of the host image. As the step size of the uniform quantizer for all color pixels is thus determined in a way that the color difference between any two neighboring colors should not exceed the JNCD, the robustness of the color image watermarking scheme to various attacks is not satisfactory.…”

Section: Estimation Of Noise Detection Thresholds For Color Imagesmentioning

confidence: 99%

“…This characteristic of the human visual perception to color stimuli in the CIELAB color space was exploited to develop the watermarking scheme for color images (Chou and Wu, 2003). Watermarks were embedded by modifying quantization indices of color pixels in the host image.…”

Section: Introductionmentioning

confidence: 99%

Block‐based watermarking for color images using visibility of quantization noise

Liu

2010

Int J Imaging Syst Tech

View full text Add to dashboard Cite

Color images are believed to be more ideal for watermark embedding than grayscale images, because color images provide more space for hiding data. Robustness and transparency of the embedded watermark are required by image watermarking for copyright protection. A feasible solution of taking advantage of color signals in the design for color image watermarking is to effectively exploit the properties of the human visual system. This article proposes a block-based watermarking scheme that is based on the visibility of quantization noise of the color signal. The block-based scheme selects perceptually significant portions in the wavelet subband of luminance and chrominance components for robust watermark insertion and embeds the watermark with maximum distortion allowed for transparent watermarking. The strategy is to use the noise detection thresholds of color signals in the color image. By using the noise detection thresholds of wavelet coefficients in the color image, the blocks with high energy can be located and the strength of the watermark can be appropriately determined for watermark embedding. Binary watermark signals are embedded in the coefficients of perceptually significant blocks by quantization index modulation. Simulation results show that the proposed watermarking scheme for color images is robust to malicious attacks while retaining watermark transparency. The performance of the proposed scheme is even better than that of the existing color watermarking method that hides the watermark in the DC components of the DCT domain of color images.

show abstract