Stereogram Gallery: Single Image Random Text Stereograms (SIRTS)
Stereograms are created one line at a time and each line is a complete stereogram.
But because the dots are so small, it takes many lines to create an image with enough
detail for the brain to recognize the 3D content of the image.
If the random dots of a stereogram are replaced with random text characters, the result
is still a stereogram. Now however, the 3D content can be seen with only a few
lines of the final image. Most folks can even see the 3D effect with a single line.
For example, consider the following line consisting of just the repetitive
text "Gary Beene".
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
There is no 3D information in the line, but by adjusting the position of the
characters the following single line stereogram can be created:
Gary Beene Gary Beene Ga Beene Ga Beene Gaor Beene Gaor Beene Gao
Even though the line above is a complete stereogram, multi-line
stereograms (just like multi-line, pixel-based sterograms) are easier
to see as the following 9-line stereogram demonstrates:
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
Gary Beene Gary Beene Ga Beene Ga Beene Gaor Beene Gaor Beene Gao
Gary Beene Gary Beene Ga Beene Ga Beene Gaor Beene Gaor Beene Gao
Gary Beene Gary Beene Ga Beene Ga Beene Gaor Beene Gaor Beene Gao
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene Gary Beene
The basic algorithm for the character adjustment is as follows:
- Create a line with a repetitive pattern
- Delete characters from the pattern to "raise"
- Add unused characters to the pattern to "lower"
The stereogram examples above use non-random strings of characters. It is
also possible to randomly replace each character and still have the same
stereogram effect. A different random replacement of characters can be
applied for each line without affecting the 3D content of the stereogram.
This corresponds exactly to the random dot stereogram approach. Here's
an example using random text characters.
OIWEQPOISDFBKJFOIWEQPOISDFBKJFOIWEQPOISDFBKJFOIWEQPOISDFBKJF
EDGHOUIEROUIYWEVDGHOXUIEROIYWEVDGHEOXUIEOIYWEVDGHEOXUIEOIYWE
KJBSVDBOIWERTBAKJBSVEDBOIWRTBAKJBSOVEDBOWRTBAKJBSOVEDBOWRTBA
SFDHNWECTBYUVRGSFDHNYWECTBUVRGSFDHCNYWECBUVRGSFDHCNYWECBUVRG
HNOWFHLSFDGWVRGHNOWFGHLSFDWVRGHNOWSFGHLSDWVRGHNLOWSFGLSDWVRG
YPOWVXTNWFECHRGYPOWVEXTNWFCHRGYPOWNVEXTNFCHRGYPWOWNVETNFCHRG
SVYUWXRGTWVETUISVYUWVXRGTWVETUISVYUWVXRGWVETUISVYUWVXRGWVETU
WVERBYOIAWEYUIVWVERBEYOIAWEYUIVWVERBEYOIWEYUIVWLVERBEOIWEYUI
EUIOETOUINWEBYOEUIOEWTOUINWEBYOEUIOEWTOUNWEBYOETUIOEWOUNWEBY
WFVEWVETN9PUW4TWFVEWPVETN9UW4TWFVETWPVET9UW4TWFBVETWPET9UW4T
NOUWQERFECHIBYWNOUWQXERFECIBYWNOUWFQXERFCIBYWNOFUWFQXRFCIBYW
VEHWETUQECRFVE[VEHWERTUQECFVE[VEHWQERTUQCFVE[VEOHWQERUQCFVE[
UIWTUIRTWUYWQCRUIWTUYIRTWUWQCRUIWTXUYIRTUWQCRUIBWTXUYRTUWQCR
IYPOWOXNPWTHIECIYPOWTOXNPWHIECIYPONWTOXNWHIECIYLPONWTXNWHIEC
R9UHWVETPUNRQYBR9UHWVETPUNRQYBR9UHWVETPUNRQYBR9UHWVETPUNRQYB
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