Rank: 26 based on 767 downloads (last 30 days) and 2 files submitted
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Tim Holy

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Washington University in St. Louis

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04 Jan 2013 Save MAT files more quickly Saves large numeric arrays more quickly than Matlab's built-in save command Author: Tim Holy file operations, save, load, mat file, hdf5, performance 51 4
  • 5.0
5.0 | 3 ratings
07 Feb 2011 Screenshot Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy color, colormap, axis, colororder, graph, legend 716 22
  • 5.0
5.0 | 19 ratings
Comments and Ratings by Tim View all
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29 Jul 2013 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy

Looks like it's the same idea. Thanks, I didn't know about that work.

11 Jul 2013 Save MAT files more quickly Saves large numeric arrays more quickly than Matlab's built-in save command Author: Tim Holy

Robin, that's good to know about parfor. Thanks for providing a version that works under such circumstances.

18 Jun 2013 Save MAT files more quickly Saves large numeric arrays more quickly than Matlab's built-in save command Author: Tim Holy

Hi Jeremy,

Your performance benefit will depend a lot on your hard drive configuration. In my case I was writing to an SSD RAID. But on my laptop (with a single SSD) I can write in about 2.1 sec, which is still a 10x benefit. What kind of performance benefit are you getting?

28 Apr 2011 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy

@Robert Daly: sorry I didn't see your question earlier. It's an interesting application.

I'm no expert at these matters, but I imagine you could convert to LMS color space and then set one or more of the components to zero. You'd probably then want to convert back to Lab to judge perceptual distinguishability.
http://en.wikipedia.org/wiki/LMS_color_space

Alternatively (and perhaps more guaranteed to be accurate), you could use this lookup table:
http://perso.telecom-paristech.fr/~brettel/colourmaps.html
and then convert the modified RGB values to Lab.

If you implement this, I'd be curious to see what the final result looks like.

14 Dec 2010 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy

Thanks for the feedback and suggestions, everyone. Perhaps even more important than the issue of depending on the Image Processing Toolbox, you helped me realize that there's no particular reason to restrict this to Lab colorspace; one can easily envision scenarios where the user would like to be able to have some control over what is considered "perceptually similar." So I have uploaded a new version that allows the user to supply his/her own function that converts RGB colors into whatever space "similarity" is to be judged in. Of course, one effect is that this will allow you to use the "colorspace" function.

Comments and Ratings on Tim's Files View all
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29 Jul 2013 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy Holy, Tim

Looks like it's the same idea. Thanks, I didn't know about that work.

29 Jul 2013 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy Tinevez, Jean-Yves

Hi Tim.
How does your submission relate to Glasbey LUT?
http://fiji.sc/Glasbey and
Glasbey, Chris, et al. "Colour displays for categorical images." Color Research & Application 32.4 (2007): 304-309.

26 Jul 2013 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy Clara

25 Jul 2013 Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy Asfaw, Abraham

Thanks! Learned quite a bit from your code.

11 Jul 2013 Save MAT files more quickly Saves large numeric arrays more quickly than Matlab's built-in save command Author: Tim Holy Holy, Tim

Robin, that's good to know about parfor. Thanks for providing a version that works under such circumstances.

Top Tags Applied by Tim
color, colororder, distinct, distinguishable, file operations
Files Tagged by Tim View all
Updated   File Tags Downloads
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04 Jan 2013 Save MAT files more quickly Saves large numeric arrays more quickly than Matlab's built-in save command Author: Tim Holy file operations, save, load, mat file, hdf5, performance 51 4
  • 5.0
5.0 | 3 ratings
07 Feb 2011 Screenshot Generate maximally perceptually-distinct colors Choose a set of n colors that can be readily distinguished from each other Author: Tim Holy color, colormap, axis, colororder, graph, legend 716 22
  • 5.0
5.0 | 19 ratings

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