Re: A color tutorial from Tom Jewett

This is excellent Dick. I support any effort to take our algorithm to the
next level.

Cheers,
David MacDonald



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On Fri, May 10, 2019 at 2:54 PM Wayne Dick <wayneedick@gmail.com> wrote:

> As usual, I forgot the URL for Tom's tutorial.
> http://colortutorial.design/index.html
> Best, Wayne
>
> On Fri, May 10, 2019 at 11:51 AM Wayne Dick <wayneedick@gmail.com> wrote:
>
>> Hi All,
>> For those interested in the color / contrast discussion Tom has developed
>> a nice introduction to the state of things right now.
>>
>> It is easy to follow and correct. It gives you some nice tools to see
>> things.
>>
>> Tom and I think the concepts of luminance and contrast need review. Here
>> are some issues we need to understand.
>> 1. Is RGB as measured on current devices meaningful in terms of sRGB?
>> 2. Are we using correct formulas for luminance and contrast.
>> 3. Has the IEEE taken any recent steps to clarify how to compute cross
>> platform computations of luminance?
>> 4. How do our members like Adobe address cross platform color issues, and
>> can this be applied in a reasonable way to computing contrast for
>> accessibility?
>>
>> Whatever formulation we ultimately choose we can always write a converter
>> our key points remain constant like 4.5:1.
>>
>> Well read, watch and enjoy,
>> Best, Wayne
>>
>>
>>
>>
>>
>>