Based on the principles of optics and radiometry, the imaging mathematical model is established and the factors of the contrast (signal-noise-ratio) of high-temperature target and the scenery are give
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Adaptive optics (AO) technique has been extensively used for large ground-based optical telescopes to overcome the effect of atmospheric turbulence. But the correction is often partial. An iterative b
An improved block-matching algorithm for fast motion estimation is proposed. The matching criterion is the sum of absolute difference. The basic idea is to obtain the best estimation of motion vectors
由于受CCD相机、中子散射及控制电路等因素的影响,数字中子照相系统所获图像常被噪音污染,抑制噪音对于提高数字中子照相系统图像质量具有重要意义·利用多尺度几何分析能捕获图像几何结构的特性,提出一种新颖的基于contourlet变换的图像去噪方法·通过计算方差一致性测度(VHM) ,确定局部自适应窗口,从而最优估计contourlet系数的阈值萎缩因子,对contourlet系数进行萎缩,实现降噪功能
In this article we introduce an exact backprojection filtered (BPF) type reconstruction algorithm for cone-beam scans based on Zou and Pan’s work. The algorithm can reconstruct images using only the p
In practice, retraining a trained classifier is necessary when novel data become available. This paper adopts an incremental learning procedure to adaptively train a Kernel-based Nonlinear Representor
This paper presents a hybrid image interpolation algorithm to keep details and edges simultaneously. The basic idea is to separate the unknown pixels into two classes and estimate them in different wa
In many image analysis and processing problems, discriminating the size and shape of each individual object in an aggregate pile projected in an image is an important practice. It is relatively easy t