SSIM (Structure Similarity Index Measure) 结构衡量指标+代码 介绍 结构相似指标可以衡量图片的失真程度,也可以衡量两张图片的相似程度。与MSE和PSNR衡量绝对误差不同,SSIM是感知模型,即更符合人眼的直观感受。 同样MSE下,不同SSIM展现的图片结果: SSIM的取值范围[-1, 1], 具有对成性,边界性,唯一最大性(当且仅...
结构相似指标（SSIM）是一种衡量图片失真程度或相似度的感知模型，它与MSE（均方误差）和PSNR（峰值信噪比）不同，更符合人眼的直观感受。在MSE下，不同SSIM值会呈现出不同的图片效果。SSIM值范围在[-1, 1]之间，具有对称性、边界性以及唯一最大性。当且仅当x和y相等时，SSIM等于1。SSIM主要考虑图片...
In fact, this was done by using dense optical flow to estimate the motion of all pixels and by comparing the Structure Similarity Index Measure of these areas obtained between the result mosaic and the input images. The obtained quantitative measures show better results and reflect better the ...
To evaluate the structural similarity between two molecules, the Tanimoto coefficient (Tc, known as the Jaccard index), a measure of the similarity between two compounds, was proposed (Lipkus, 1999). A higher Tc score indicates that two compounds are more similar, but Tc does not provide ...
penalizes results that are not perceptually similar to labels by defining a distance measure between activation maps of a pre-trained network 其中, \Phi _i 表示预训练网络第i 层的activation map ,对应于 relu1_1, relu2_1, relu3 1, relu41 and relu5_1 of the VGG-19 network pre-trained...
The quality of the clustering structure is optimized by maximizing the FM index. FM index provides a measure of similarity between two clustering trees, between clustering trees generated based on 9 aforementioned algorithms and a reference categorization of the complex substances based on their ...
Function F(R; X, Y) enables us to initially sidestep this problem, in principle at least, because the fast fall-off of the closeness measure D ij (R) (Eq. 2) makes possible the double sum over all elements without the danger of obtaining as the optimal a solution where no actual ...
TADs are domains with high levels of internal interaction, so one measure of TAD annotation quality is the average observed/expected ratio within TADs (Fig. 6e). RefHiC’s TAD predictions are among the densest in interaction frequencies. We then calculated the enrichment for ChIP-Seq signals of...
The co-word matrix with zero in the diagonal is transformed into a similarity matrix by distance correlation in SPSS, with the measure of Pearson's Correlation (Cho, 2014; Khasseh et al., 2017). Since there are too many zero values in the similarity matrix, we use one minus this matrix...
Moreover, for applied applications it is important to maximise MRRs in laser ablation processes as a measure of improved machining efficiency. Yao et al. [65] have shown that in an instance, when nano-crystalline CVD diamond is subjected to fs-laser ablation, the Ra and MRR are almost ...