Colour Blindness...

[Karlos]

My particular colourblindness is quite difficult to characterise properly.

I was first diagnosed as an extreme Deutanome, but more detailed tests showed I was between that and cone monochromatic.

The specific problem, as far as they could ascertain, is that I have far to many S cones (short wavelength, ie blue) and a much reduced number of L or M cones.

My eyes are hypersensetive to some shades of blue, particularly that neon blue colour that way too many people are now fronting their take outs with :-D

It's like looking at burning magnesium *squint*

[Karlos]

Also, check this out

Designing for the colourblind

[Karlos]

@Cymric

Congratulations, sir, you have solved the first challenge on the Path of Chromination ;-)

If you can deduce the remainder, you are welcome in the new world order :evilgrin:

Muhahaahaaaa... *cough*

[Karlos]

X-ray wrote:

I take it that watching Tron in the cinema is a no-go then?  :-P

That movie was an arsefez for many reasons even before we get that far ;-)

[Karlos]

PMC wrote:

You'll not be buying a Volkswagen at any point in the near future either!

The typical VW dash isn't that bad. It's quite a narrow range I'm hypersensetive to, and that's just on the longer wavelength end. It still looks a bit harsher than I'd like, but you don't spend all day looking at it.

The biggest problems are seeing traffic lights at a distance. Until I'm close enough to observe the enclosure, its very difficult to tell which colour is on. At night, it can be difficut to even see a traffic light amidst all the normal lights etc on your typical highstreet.

[Karlos]

@X-Ray

Thin ice, my friend, thin ice :evilgrin:

[Karlos]

It put a crimp on my electronics hobby. Until I got a DMM, that is :-D

Pity I can't find the damn thing :lol:

[Karlos]

For the really curious...

Sight is the product of the physical operation of the eye and the interpretation of that data by the visual cortex. It's impossible, really, to tell someone else how your visual perception interprets the world.

For myself, I can usually differentiate a strong (ie reasonably saturated) colour from the absence of colour (grey), but not one colour from another, unless its bluish. Unsaturated colours (unless blue) are hard to differentiate from grey.

A picture paints a thousand words, so with that, I spent a while trying to make an image process filter that converts unsaturated non blues to grey, passes some blue-greens and enhances the contrast of blues. It's not perfect by a long chalk as I can see the difference from the input and output, but the important thing is, it removes the distinction between colours I can't really perceive.

Lyme Hall as you 'normals' see it

Lyme Hall as I see it

[Karlos]

whabang wrote:
It kinda looks like as if it was in the middle of the night, although much lighter.

Your cone cells require much higher levels of light than the rods to be stimulated properly. Generally, everybody sees in greyscale in low enough light levels :-)

[Karlos]

The lack of colour perception for all those poncy earthy tones is more than made up for by some of nature's shades. Try these:

Some blue flowers

As I perceive them... (sort of - the filter wiped out the sky which looks quite blue to me)

[Karlos]

Doobrey wrote:

Karlos wrote:
Generally, everybody sees in greyscale in low enough light levels :-)

Or if it's still daylight, a litre or two of homemade slivovitz has the same effect. :pint:

:lol:

Try meths, it's cheaper*.







*disclaimer: this is a very stupid idea. You'll likey die or go blind at least ;-)

[Karlos]

In the DVLA application form, it lists visibility defects but expressly excludes colour blindness from that list.

[Karlos]

@mdma

Actually it's more a case of the general level of non-understanding of how colourblind people see the world that means they don't allow it as a recognised impairment.

Most colourblind people have no difficulty in recognising traffic lights in normal lighting conditions. However, depending on the type (something that the DVLA in particular clearly have no understanding of - that there are types of colour disability) and severity of the dysfunction, it can be impossible to tell certian traffic signals apart.

I myself find red traffic lights very hard to see in bright conditions and all traffic lights are hard to distinguish from a distance under any lighting conditions where the enclosure itself is not obvious.

[Karlos]

I wonder how those same images will look in adz-o-vision?

[Karlos]

X-ray wrote:
Did you see that news article about the painter who is (allegedly) completely colour-blind? They hooked up a camera to a laptop and converted all the visible wavelengths to sound frequencies. He aims the camera at a colour on his subject and the sound tells him which one it is. I thought that was pretty cool.

Yeah, but how the hell does he mix the paint? :-?