How to make a reverse color blind sign, image etc?!


Question: Hi to everyone who reads this.

I am colourblind and forever seeing that there is signs made for non colourblind people to see what colourblind can people see.

Many a time friends of mine have played practical jokes on me, and now i'm wondering how to make images,signs etc that non colourblind people cant see to have my own laugh back.

Can anyone suggest a link that explains how to or anything that might be of help, i have done many searches and never found anything of any use to help me with this. Only stuff about colourblind people and filters to let non colourblind people see what colourblind people can see.

Thanks for your time reading this, and any replys


Answers: Hi to everyone who reads this.

I am colourblind and forever seeing that there is signs made for non colourblind people to see what colourblind can people see.

Many a time friends of mine have played practical jokes on me, and now i'm wondering how to make images,signs etc that non colourblind people cant see to have my own laugh back.

Can anyone suggest a link that explains how to or anything that might be of help, i have done many searches and never found anything of any use to help me with this. Only stuff about colourblind people and filters to let non colourblind people see what colourblind people can see.

Thanks for your time reading this, and any replys

Wow, I think my eyes have gone bad, because I can barely read Jackson N's answer. Which is wrong, anyway.

Depending on your type of colour vsion anomaly it is possible to construct letters which you can see and that people with normal colour vision cannot.

The trick is to make the letters and background using the dot technique of the standard Ishihara test but in such a way that the letters are made up of coloured portions that look different to normal people, but form a coherent whole to those with a R/G defect. To the former the letters will be hard to see, as they will have the equivalent of camouflage "dazzle paint" on them.

The last example on the first URL below does this, in such a way that two different numbers can be seen on the same test.
But it would be easy to scramble the one that "normal" people see, as is the case on charts 14, 15 and 19 on the second URL below.
The biggest difficulty is accurately reproducing the required colours. I don't know of any software that would make it easy.

tha reason u havnt found n e thing is cause theres nothin
n i don getit cant u c tha signs cause of tha colour or wat...does tha colour make tha words blurry or is der jus a big white blob there or can u read tha sign n i jus don get wat ur tryin 2 say??

I tried to find something to tell you but I couldn't find any .

edit : i agree with pedestal , excellent links and explanation .





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