Digital Watermarking for JPEG Encoder

Introduction

• Digital watermarking has been proposed as a viable solution:

– Copyright protection.

– Authentication.

• The watermarking methods are classified in two main categories:

– Spatial domain.

– Frequency domain.

Feature

• Frequency domain embedding.

• System level design for embedded watermark techniques.

• Extracted watermark without the original image.

• Watermark invisibility.

• High robustness.

Experiment Result

JPEG attack

Correlation and PSNR of difference compression quality by C simulation

Correlation and PSNR of difference compression quality by DSP (TM-1300) simulation

Correlation and PSNR of difference compression quality by ASIC simulation

Noise attack

Watermarked image after addition of uniform noise and detector response

Made by 蔡連宗