#
Watermark Embedding Scheme with Variance of Chromatic Components^{ †}

^{1}

^{2}

^{*}

^{†}

## Abstract

**:**

## 1. Introduction

## 2. Methods

#### 2.1. Steps of the Embedding Scheme

- Converting color images into international commission on illumination (CIE) color spaces, such as Luv and La*b*;
- Dividing images into 8 × 8 blocks;
- Transforming the chromatic components into sequency domain;
- Calculating the variance of the sequency domain coefficients;
- Setting the threshold value for the variance;
- Selecting the watermark coefficients from the spatio-chromatic coefficients on the bases of variance as shown in Figure 2;
- Generating the watermark bits zero and one;
- Inserting the watermark into the host image according to binary bits and variance;
- Taking inverse transforms of the watermarked image;
- Converting into an RGB image.

#### 2.2. Complex Hadamard Transform

#### 2.2.1. Sequency-Ordered CHT

#### 2.2.2. Conjugate Symmetric SCHT

## 3. Embedding Process

## 4. Decoding Process

## 5. Discrete Cosine Transform

- Read the actual image and divide it into 8 by 8 blocks that do not overlap;
- Each non-overlapping block’s forward DCT should be calculated;
- The highest coefficient selection criteria and HVS block selection criteria are applied;
- Add a secret image to the relevant frequency coefficient;
- Each block undergoes an inverse DCT transformation.

## 6. Result and Discussion

## 7. Conclusions

## Author Contributions

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Conflicts of Interest

## References

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**Figure 4.**(

**a**) Original baboon 512 × 512 images, watermarked and magnified using (

**b**) SCHT transform; (

**c**) CS-SCHT transform; (

**d**) DCT transform.

Watermarking Technique | PSNR |
---|---|

CS SCHT | 94.0070 |

SCHT | 92.0482 |

DCT | 87.9364 |

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**MDPI and ACS Style**

Dur-e-Jabeen; Waqqas, F.; Shaukat, H.; Fatima, M.; Iftikhar, R.; Khan, T. Watermark Embedding Scheme with Variance of Chromatic Components. *Eng. Proc.* **2023**, *32*, 26.
https://doi.org/10.3390/engproc2023032026

**AMA Style**

Dur-e-Jabeen, Waqqas F, Shaukat H, Fatima M, Iftikhar R, Khan T. Watermark Embedding Scheme with Variance of Chromatic Components. *Engineering Proceedings*. 2023; 32(1):26.
https://doi.org/10.3390/engproc2023032026

**Chicago/Turabian Style**

Dur-e-Jabeen, Faiza Waqqas, Habib Shaukat, Maria Fatima, Rumaisa Iftikhar, and Tehmina Khan. 2023. "Watermark Embedding Scheme with Variance of Chromatic Components" *Engineering Proceedings* 32, no. 1: 26.
https://doi.org/10.3390/engproc2023032026