Study on Image Compression and Digital Watermarking using Wavelet Transform and Fractal

为了存储和传输大量的图像或视频，需要使用图像压缩技术。为此，我们提出了一种新的基于双分形的运动图像压缩方法。利用彩色图像和运动图像的特点，缩短了算法的计算时间。现在有许多未经授权使用图像和伪造图像。为了保护图像的版权，需要检测篡改区域并恢复篡改区域。提出了一种基于汉明码的灰度图像认证方法。我们将这种方法扩展到彩色图像。此外，我们在彩色图像中嵌入了最高有效位。该方法可以有效地消除回火区域。嵌入水印后的图像保持了较好的图像质量。

In order to store and transmit a large number of images or video, image compression technology is needed. So we propose a new moving image compression method using a dual-fractal. And we reduce the calculation time of proposed method by using the characteristic of color images and moving picture. Now there are many unauthorized use of the images and falsifications of the images. In order to protect copyright of the images, to detect tampered region and to recover tampered region is required. Image authentication method using Hamming code for gray scale image has been proposed. We extend this method to color images. Furthermore, we embed the most significant bit at the color image. The proposed method can effectively eliminate tempered region. And the image which watermarks were embedded in keeps a good quality.