... -几何线性度 Geometric linearity -梯度幅值 Gradient amplitude -片选轮廓 Slice profile ...
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A new method for objective assessing image quality is presented. This method is based on gradient magnitude. and does not need the original image for reference.
提出一种新的图像质量的客观评价方法,该方法用图像梯度幅值的累加和作为衡量图像质量的指标,无需原始图像作参考,适合于两幅以上同源图像对比来相对地评价图像质量。
参考来源 - 一种基于梯度幅度值的图像质量客观评价方法·2,447,543篇论文数据，部分数据来源于NoteExpress
再由图像的梯度幅值均值和方差计算出图像的最佳阈值。
Then, the best threshold value is calculated basing on the gradient magnitude mean and the variance of the image.
等效塑性应变的幅值、动能、弹性应变能及耗散能随时间的变化规律与功能梯度材料组份成分沿厚度的变化密切相关。
The distributions of equivalent plastic strain, dissipated, kinetic and elastic strain energies are all dependent on the gradient distribution of the composition.
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