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Accessibility issues with Gaussian blur animation #28

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@ErinBecker

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@ErinBecker

In https://datacarpentry.org/image-processing/06-blurring/ there is an animation showing a Gaussian blur in progress. This animation is really cool, but I'm concerned that it makes part of the episode inaccessible for people without stable internet access (who may be using these lessons in PDF version).

This is what appears in the print version of the page:
Screen Shot 2019-06-19 at 3 40 20 PM

Is it possible to have the print version show the final state of the animation rather than the start point? Or alternatively, to have the animation start by showing the final result and then go black and then show the blur building up?

A related issue is that the red square showing the highlighted pixel won't show up for red/green color blind users against the grey/brown/green background. From my understanding, a purple square would show up relatively well for all three major types of colorblindness. It will appear blue or bluish purple and be distinguishable from the green/brown background. (https://usabilla.com/blog/how-to-design-for-color-blindness/)

That having been said, the image itself might be hard for people with red/green colorblindness to parse - I'm not an expert on this. Happy to hear other thoughts about how best to address this!

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    help wantedLooking for Contributorstype:accessibilityimprove content compatibility with assistive technology as well as unassisted access

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