Study on Digital Watermark for Animation

随着信息化社会的发展，出版、广播、广告、教育等诸多领域的内容数字化进程正在稳步推进。目前，数字多媒体内容的版权保护成为一个世界性的问题，数字水印被认为是解决这一问题的主要技术之一。其中，数字多媒体内容的版权保护被认为是解决这一问题的主要技术之一，动画图像是横扫全球市场的内容，在国内更是独一无二，除了知识产权保护外，更是一个非常重要的问题。本研究任务的目的就是研究和开发专门针对这样一种动画的数字水印技术。为了达到这一研究目的，2003年，动画图像提出了适合彩色图像的数字水印，旨在成为一幅通用的彩色图像。嵌入信息可以…更多的是提取正确的，即使它改变了JPEG压缩和亮度，一个特定的色度成分。顺便说一句，2005年，它成功地对该方法进行了更多的改进，增加了能够嵌入的信息量，并增强了对JPEG压缩的容忍度。2004年，它开发了有效的数字水印法则，使动画方法一般只包含成对的动画图像。在动画内容的情况下，除了考虑对静态图像内容的插补动作之外，还必须考虑动画特有的插补动作。建议，所开发的时空图像嵌入方法具有即使在高速嵌入的帧中也可以正确地提取嵌入信息的特征，并且还可以选择构成动画的部分。此外，在拍摄这些动画时，考虑到添加微小的离心式失真，但即使添加离心式失真也可以正确地估计旋转角度，并且正在进行使水印读取成为可能的技术的发展。2005年，它涉及到在动画图像的线条部分嵌入水印的技术的发展，并对字符字体的数字水印嵌入技术进行了开发和研究。较少

As the information-oriented society develops, the digitalization of many contents is progressing with extensive field of the publication, the broadcast, the advertisement, the education and so on steady.At present, the copyright protection of the digital multimedia content becomes a worldwide problem and a digital watermark is regarded as being one of the main technologies which solve this problem.Among them, the animated image is the content which sweeps over a global market exceptionally in the country to say that the unique content is thin about and is a very important problem in addition to the protection of the intellectual property.The purpose of this research task is the research and development of the digital watermark technique to have dealt with such a animation specifically.To achieve a this research purpose, in 2003, the animated image did the proposal of the digital watermark which suited a color image, aiming at being a color image generally. The embedding information can … More be extracted right even if it changes JPEG compression and brightness, a chrominance ingredient specifically. Incidentally, it succeeded in adding improvement to this method more in 2005, and increasing the volume of information to be able to be embedded by and strengthening tolerance to the JPEG compression.In 2004, it did development of the valid digital watermark law, making animation method in general who contains an animated image in a pair.In case of the animation content, the act of interpolating which is peculiar to the animation must be considered in addition to the act of interpolating which is thought of to the static image content.The proposal, the developed space-time image embedding method have the characteristic that the embedding information can be extracted right even if the part of the frame it is possible to process for the animation, too, being at high speed embedded and also which composes a animation is picked out.Moreover, when taking these animations the photograph with the camcorder and so on, that a minute centrifugal-distortion is added is thought of, but it estimates the rotation angle right even if a centrifugal-distortion is added and is doing development of the technology which makes the reading of the watermark possible.In 2005, it related to development of the technology by which a watermark is embedded in the line part of the animated image to that and it did development and a research about the digital watermark embedding technology to the character font, too. Less