Description: 此为新型迭代图象重建算法的理论研究与实现，此论文分别采用模拟数据和两套实际数据进行计算机断层成像重建-this as a new type of iterative image reconstruction algorithm theoretical research and the realization this paper were used two sets of simulated data and actual data for computer tomography reconstruction Platform: |
Size: 1097196 |
Author:王雪晴 |
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Description: 此为新型迭代图象重建算法的理论研究与实现，此论文分别采用模拟数据和两套实际数据进行计算机断层成像重建-this as a new type of iterative image reconstruction algorithm theoretical research and the realization this paper were used two sets of simulated data and actual data for computer tomography reconstruction Platform: |
Size: 1096704 |
Author:王雪晴 |
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Description: 当前论文主要考虑的是非信号依赖的高斯噪声下的图像恢复，本程序实现了泊松噪声下的图像恢复，泊松噪声为信号依赖噪声，能够更加有效逼近实际成像系统噪声。- This is the code that was used in the papers "A Nonnnegatively Constrained Convex Programming Method for Image Reconstruction", "Total Variation-Penalized Poisson Likelihood Estimation for Ill-Posed Problems", "Tikhonov Regularized Poisson Likelihood Estimation: Theoretical Justification and a Computational Method", "An Efficient Computational Method for Total Variation with Poisson Negative-Log Likelihood", "An Analysis of Regularization by Diffusion for Ill-Posed Poisson Likelihood Estimation," "An Iterative Method for Edge-Preserving MAP Estimation when Data-Noise is Poisson", and finally, "Regularization Parameter Selection Methods for Ill-Posed Poisson Maximum Likelihood Estimation". See my publications page for more details. The main algorithm is for nonnegatively constrained, regularized Poisson likelihood estimation. At this point you can choose Tikhonov, total variation regularization, and diffusion regularization. A number of other methods are also implemented. Regularizatio Platform: |
Size: 432128 |
Author:sun |
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Description: OS-EM迭代算法 用于图像重建，是一种新的图像重建方法，可以有效减少伪影-OS-EM iterative algorithm for image reconstruction, is a new image reconstruction method can effectively reduce the artifacts Platform: |
Size: 2048 |
Author:王 |
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Description: SIRT法
联立迭代图像重建法
用于求解大型线性方程组
A[M][N]*x[N]=b[M]-SIRT method of simultaneous iterative image reconstruction method for solving large linear equations A [M] [N]* x [N] = b [M] Platform: |
Size: 1024 |
Author:Caesar Y. |
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Description: 本程序在matlab中运行。
Generate_SystemMatrix是一个计算OSEM，MLEM迭代图像算法中系统矩阵的函数，其用法Generate_SystemMatrix（pixel），为所要重建图像的大小，一般为64,128,256，pixel也大运算越慢。
里面的diedai-test文件是一个简单的MLEM重建算法，其中要加载SystemMatrix矩阵就是Generate_SystemMatrix(128)的结果，注意如果要运行diedai-test，生成的系统矩阵名要保存为SystemMatrix，否则出错。
testsino是一个正弦图实例，就是MLEM算法中的投影矩阵，机算是数据。-This program is run in matlab. The Generate_SystemMatrix is a calculation of the OSEM, a function of the system matrix MLEM iterative image algorithm, its use Generate_SystemMatrix (pixel) to rebuild the image size, usually 64,128,256, pixel also large computing slower. Inside diedai-test file is a simple MLEM reconstruction algorithm, which load SystemMatrix matrix is the result of Generate_SystemMatrix (128), pay attention to if you want to to run diedai-test, the generated system matrix is saved as SystemMatrix, otherwise an error. testsino instance of a sinogram projection matrix MLEM algorithm, machine be regarded as data. Platform: |
Size: 173056 |
Author:cc |
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Description: ART迭代算法重建图像 matlab 可放到其他语言环境中使用-ART iterative image reconstruction algorithm matlab environment can be put to use in other languages Platform: |
Size: 1024 |
Author:wanglimei |
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Description: 基于压缩感知思想的图像分块压缩与重构方法
考虑到大多数图像信号信息分布有差异, 编码端, 在对图像分块的基础上, 融合熵估计
和边缘检测方法计算各图像块的信息含量, 再从两个不同的角度进行分类采样: 依据信息量多少将图像块分为平滑、过渡和纹理3 类, 使用不同的采样率采样 依据信息量的分布特征, 采用不同的采样率分配策略进行采样. 在解码端, 根据不同类型的图像块构造不同的线性算子进行重构, 再运用改
进的迭代阈值算法去除块效应和噪声. 实验证明, 算法在提升图像重构质量的同时缩短了重构时间,并且对纹理边缘多的图像的重构效果较其他方法理想.-Considering that most information of the image signal difference distribution, the encoding side, in the right image sub-blocks based on the integration entropy estimation
And edge detection method for calculating the information content of each image block, and two different angles classification sampling: The number of image blocks based on the amount of information into a smooth, transition and texture three classes, using different sampling rates based on the amount of information distribution characteristics, using different sampling sampling rate allocation strategy. in the decoding side, depending on the type of image blocks to construct different linear operator reconstructed, re-use change
Iterative thresholding algorithm into blockiness and noise removal experiments show image reconstruction algorithm to enhance the quality while reducing reconfiguration time, and much of the texture edge image reconstruction results are satisfactory compared to other methods. Platform: |
Size: 10092544 |
Author:Dr_wong |
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