4 ms·

Isn't this almost the same as the viridis palette that has been around for ages? https://cran.r-project.org/web/packages/viridis/vignettes/intro-to-viridis.html

Isn't this almost the same as the viridis palette that has been around for ages? https://cran.r-project.org/web/packages/viridis/vignettes/intro-to-viridis.html https://cran.r-project.org/web/packages/viridis/vignettes/in...

driax 8y ago
I just skimmed the paper [1], and their conclusion starts: > We identified one colormap in particular to be optimal for viewing by those with or without CVD, which we name cividis (Figs 4 and 5), generated by optimizing the viridis colormap and selecting the J' linearization that maximizes the range of J'. We chose this map due to its wide range of colors, resulting from a wide range of J0 values while still changing b0 significantly, and overall sharpness when overlaid onto complex images. So pretty closely related :) [1] https://arxiv.org/ftp/arxiv/papers/1712/1712.01662.pdf https://arxiv.org/ftp/arxiv/papers/1712/1712.01662.pdf
- jfoldager 8y ago
  I'm disappointed that they (in my opinion) managed to make a worse color scale. If you look at the CVD-Jet color bar you can see blocks that appears quite similar separated by too sharp transitions. This is a common problem in e.g. rainbow scales. They highlight them selves that yellow appears as highligt, yet the highest values get translated to black. How is black supposed to be interpreted as more luminescent/intense than yellow? It happens to be a color scale that makes the cells look good, but to me that is happenstance.
  - raphlinus 8y ago
    CVD-Jet is not the new color scale, it's a simulation of what Jet looks like for certain colorblind users. To my eyes, cividis (which is the new scale) is good by the numbers, and there's a strong argument it's more robust for colorblind users, but viridis looks better.
anc84 8y ago
Their abstract explains things better: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0199239 http://journals.plos.org/plosone/article?id=10.1371/journal.... They built a tool for any colormap. And then used it on Viridis. The result is this Cividis. http://journals.plos.org/plosone/article/figure/image?size=large&id=info:doi/10.1371/journal.pone.0199239.g004 http://journals.plos.org/plosone/article/figure/image?size=l...

driax 8y ago

I just skimmed the paper [1], and their conclusion starts: > We identified one colormap in particular to be optimal for viewing by those with or without CVD, which we name cividis (Figs 4 and 5), generated by optimizing the viridis colormap and selecting the J' linearization that maximizes the range of J'. We chose this map due to its wide range of colors, resulting from a wide range of J0 values while still changing b0 significantly, and overall sharpness when overlaid onto complex images. So pretty closely related :) [1] https://arxiv.org/ftp/arxiv/papers/1712/1712.01662.pdf https://arxiv.org/ftp/arxiv/papers/1712/1712.01662.pdf

jfoldager 8y ago
I'm disappointed that they (in my opinion) managed to make a worse color scale. If you look at the CVD-Jet color bar you can see blocks that appears quite similar separated by too sharp transitions. This is a common problem in e.g. rainbow scales. They highlight them selves that yellow appears as highligt, yet the highest values get translated to black. How is black supposed to be interpreted as more luminescent/intense than yellow? It happens to be a color scale that makes the cells look good, but to me that is happenstance.
- raphlinus 8y ago
  CVD-Jet is not the new color scale, it's a simulation of what Jet looks like for certain colorblind users. To my eyes, cividis (which is the new scale) is good by the numbers, and there's a strong argument it's more robust for colorblind users, but viridis looks better.

anc84 8y ago

Their abstract explains things better: http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0199239 http://journals.plos.org/plosone/article?id=10.1371/journal.... They built a tool for any colormap. And then used it on Viridis. The result is this Cividis. http://journals.plos.org/plosone/article/figure/image?size=large&id=info:doi/10.1371/journal.pone.0199239.g004 http://journals.plos.org/plosone/article/figure/image?size=l...