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Measuring the Effects of Scalar and Spherical Colormaps on Ensembles of DMRI Tubes

机译:测量标量和球形色调对DMRI管乐队的影响

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We report empirical study results on the color encoding of ensemble scalar and orientation to visualize diffusion magnetic resonance imaging (DMRI) tubes. The experiment tested six scalar colormaps for average fractional anisotropy (FA) tasks (grayscale, blackbody, diverging, isoluminant-rainbow, extended-blackbody, and coolwarm) and four three-dimensional (3D) spherical colormaps for tract tracing tasks (uniform gray, absolute, eigenmaps, and Boy's surface embedding). We found that extended-blackbody, coolwarm, and blackbody remain the best three approaches for identifying ensemble average in 3D. Isoluminant-rainbow colormap led to the same ensemble mean accuracy as other colormaps. However, more than 50 percent of the answers consistently had higher estimates of the ensemble average, independent of the mean values. The number of hues, not luminance, influences ensemble estimates of mean values. For ensemble orientation-tracing tasks, we found that both Boy's surface embedding (greatest spatial resolution and contrast) and absolute colormaps (lowest spatial resolution and contrast) led to more accurate answers than the eigenmaps scheme (medium resolution and contrast), acting as the uncanny-valley phenomenon of visualization design in terms of accuracy. Absolute colormap broadly used in brain science is a good default spherical colormap. We could conclude from our study that human visual processing of a chunk of colors differs from that of single colors.
机译:我们报告了对集合标量和方向的颜色编码来显示扩散磁共振成像(DMRI)管的颜色编码。该实验测试了六个标量Colormaps,用于平均分数各向异性(FA)任务(灰度,黑体,发散,解剖学彩虹,延长黑体和CoolWarm),以及用于道追踪任务的四个三维(3D)球形Colormaps(均匀灰色,绝对,eigenmaps和男孩的表面嵌入)。我们发现延长黑人,CoolWarm和黑人仍然是识别3D中的合奏平均值的最佳三种方法。 Color-Rainbow Colormap导致与其他Colormaps相同的均值精度。然而,超过50%的答案始终如一的估算项目平均值,与平均值无关。色调的数量,而不是亮度,影响平均值的集合估计。对于集合方向跟踪任务,我们发现男孩的表面嵌入(最大的空间分辨率和对比)和绝对色调(最低空间分辨率和对比)导致比EigenMaps方案(中分辨率和对比)更准确的答案,表现为在准确性方面的可视化设计的不一体谷现象。大脑科学广泛用于脑科学的绝对Colormap是一个良好的默认球形Colormap。我们可以从我们的研究结束,即人类视觉处理的颜色块的不同之处不同。

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