HIS域中基于金字塔变换的影像缩放算法及实现

THE IMPLEMENTAION AND METHOD OF IMAGE ZOOM BASE ON PYRAMID TANSFORM IN HIS REGION

将图像由RGB域变换到HIS域,在该领域中利用线性金字塔影像的分析算子和综合算子对图像进行重采样,形成了由粗到精的多分辨率表示的影像金字塔。若原图像处在金字塔的第J层,J增加的方向为图像缩小的方向,J减小的方向为图像放大的方向。在金字塔变换中利用线性变换算法,加快了运算速度;HIS领域内重采样又有利于保持图像的纹理特征和高频信息,能有效的克服图像模糊的现象。试验表明,该算法在运算时间和影像质量上均取得了很好的效果。

Transform the image from RGB region to HIS region,and resample it by using linearity images pyramid’s analysis and synthesis operator at this region. After it, the multiresolution images pyramid have been accomplished. If the original image exist at the J layer, when make J bigger, the image will be lessen; When make J smaller, the image will be get large. This paper use linearity transformation method in pyramid transformation. It speed the calculation. And resampling in HIS region can conquer blur phenomena. The experiment result indicate that this method obtain good display not only in calculation time but also in image quality.