Comments on: Colorblind Colors of Confusion http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/ Color Blindness viewed through Colorblind Eyes Mon, 02 Jan 2012 18:38:03 +0000 hourly 1 http://wordpress.org/?v=3.0.3 By: Michael Hagerty http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/comment-page-1/#comment-109613 Michael Hagerty Wed, 06 Apr 2011 22:56:19 +0000 http://www.colblindor.com/?p=694#comment-109613 There was a wonderful add-on for Firefox, CBext, that is currently disabled as the authors have not updated it to work with the 4.0 version of the browser. It had a color test inside and would repaint the screen with colors that were visible to the individual. This add-on was a wonderful addition to Firefox and made viewing the web much easier for this protanope. I really would love to have it back... There was a wonderful add-on for Firefox, CBext, that is currently disabled as the authors have not updated it to work with the 4.0 version of the browser. It had a color test inside and would repaint the screen with colors that were visible to the individual. This add-on was a wonderful addition to Firefox and made viewing the web much easier for this protanope. I really would love to have it back…

]]> By: Designing accessible color spectrums Joshua Tauberer’s Blog http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/comment-page-1/#comment-108316 Designing accessible color spectrums Joshua Tauberer’s Blog Sun, 09 Jan 2011 00:19:41 +0000 http://www.colblindor.com/?p=694#comment-108316 [...] point”. Color blind individuals (of each type) cannot distinguish two colors if they fall on the same radial line. These are called confusion lines. (Also, this is an interesting way of understanding the reduction [...] [...] point”. Color blind individuals (of each type) cannot distinguish two colors if they fall on the same radial line. These are called confusion lines. (Also, this is an interesting way of understanding the reduction [...]

]]> By: Mohamad Hamade http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/comment-page-1/#comment-43639 Mohamad Hamade Fri, 04 Dec 2009 18:45:56 +0000 http://www.colblindor.com/?p=694#comment-43639 Hello i would like to know please if the nagel anomaloscope is based on subtractive or additive color mistures for the realization of the Red and Green mixture field? i am currently reading the visual perception book and i would like to know please more info about it as the CIE chromaticity diagram is not so clear for me. thank you and best regards Hello

i would like to know please if the nagel anomaloscope is based on subtractive or additive color mistures for the realization of the Red and Green mixture field?
i am currently reading the visual perception book and i would like to know please more info about it as the CIE chromaticity diagram is not so clear for me.
thank you and best regards

]]> By: Daniel Flück http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/comment-page-1/#comment-31028 Daniel Flück Wed, 25 Mar 2009 20:43:03 +0000 http://www.colblindor.com/?p=694#comment-31028 Marty, the graph is actually quite simple. Just take the x/y coordiantes of one of the confusion points and draw any line through it in the CIExy color space - and you have a confusion line. Concerning the math of image transformation, I think they are all based on the same. As I don't have them handy, follow the sources of <a href="http://www.colblindor.com/coblis-color-blindness-simulator/" rel="nofollow">Coblis</a> and you'll find them. Marty, the graph is actually quite simple. Just take the x/y coordiantes of one of the confusion points and draw any line through it in the CIExy color space – and you have a confusion line.

Concerning the math of image transformation, I think they are all based on the same. As I don’t have them handy, follow the sources of Coblis and you’ll find them.

]]> By: Marty Picco http://www.colblindor.com/2009/01/19/colorblind-colors-of-confusion/comment-page-1/#comment-31025 Marty Picco Wed, 25 Mar 2009 17:40:10 +0000 http://www.colblindor.com/?p=694#comment-31025 Hi Daniel, I am investigating tools for colorblind people, and one of the things I would like to be able to code is to transform images as they are seen by various types of color blindness. I've been looking into the math behind all of this, scouring the web, bought a couple of books on the subject (including the one you recommend), but I can't find a reference as to the mathematical definition of the confusion lines. (I've seen the graphs you have on this page in a number of places.) I notice from your site and from several others that you are using a lookup table. What's the source of the data? Is there a good reference for the required transforms? Any pointers you could give me would be helpful. Thanks, Marty Hi Daniel,

I am investigating tools for colorblind people, and one of the things I would like to be able to code is to transform images as they are seen by various types of color blindness.

I’ve been looking into the math behind all of this, scouring the web, bought a couple of books on the subject (including the one you recommend), but I can’t find a reference as to the mathematical definition of the confusion lines. (I’ve seen the graphs you have on this page in a number of places.)

I notice from your site and from several others that you are using a lookup table. What’s the source of the data? Is there a good reference for the required transforms?

Any pointers you could give me would be helpful.

Thanks,

Marty

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