数字图像置乱利用一种可逆的变换将原始图象变换成一个杂乱无章的新图像,它通常作为图像信息安全与隐藏的基础性工作。
As the basic means for hiding huge image information, the scrambling of digital image makes the old image to a new disorderly image with a reversible transform.
交互式数字图象的配准与镶嵌主要由二个步骤来完成:第一步是由人在显示屏幕上选择确定图像几何位置的控制点集,然后由此确定一幅图像几何变换使两幅图像在几何位置上配准。
Step one is to pick up the control point set which determines the geometric position of images, and then to derive a geometric transform for registering one image to another from those points.
基于小波变换的SPIHT图像压缩方案是一种实用高性能图象压缩编码算法,但原始SPIHT算法链表式编码限制了其在高速处理中的应用。
SPIHT is a well recognized coding algorithm due to its high effecient performance. But SPIHT is unsuitable for high-speed hardware implementation. An improved coding algorithm to SPIHT is introduced.
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