1)Alphabetical order captcha:We can use Html5's drag and drop Api to list a particular
Set of images into one category .for example in the example mentoined in the demo
here ,i made a collection of diff words starting with letters A,B,C ....as an
output i grouped up words with starting letter A diff from words with starting letter
B,C....As,i used text in this example we can use images of diff animals such as cat's
and dog.....and by drag and drop we can group images of cat and that of dog in diff
categories.2)Annotation captcha:We can use Images With annotations from
commons determine the subcategoriy the annotations belongs to and then give relevant
options to the users ;for example in the file we can search
from names of different annotations to which they corresponds to from wikipedia(names
given here are those of mountain) and then give the the option's much relevant to the
image.3)Effect captcha:We can use image as a question which are changed by the effect
produced php's gd library and the use the same file with another effect and then ask
user to match the two files.....for example:the image1 can be used as a
question asking user to click on the image that matches with the question image and as an
answer we can give this spiral image of the original image.Similarly we
can give filters to different images producing different options asking user for right
answer.4)Direct captcha:We can ask to user direct questions like ask for selecting cat out
of options consisting of images of cats and humans.....an example by pginer demonstrate
this example5)Ask User to click on given effect: Asking user to click on images
consisting of spiral effect's out of options which consist of images with spiral and
other effects(example:greyscale).6)Drag and Drop character in Correct Place: We can use
drag and drop api of html5 to ask user to form an particular alphabet or no out of the
pieces of character provided .Here is an example to form an character
"A" and an digit "8" out of the same pieces of character.This drag and
drop capability can be further enhance to form a particular shapes.For example form a clip
art from a particular set of piece of shapes....for example the image
given hereinserts the correct nose as asked in the in the questions out of the
possible options provided.Most,Importantly i think creation of an index system would be
fruitful since it would rank the inappropriate images on the basis of users response (rank
is negative for an image if user needs to reload a captcha) to a provided captcha.This as
the time passes will provide us with relevant images which are user friendly and
equivalently secure to use.......In addition i sincerely appreciate a point mentioned by
Gmansi of creation of jigsaw puzzle for the images but in my view point there will be
listing of some particular category of images and those ranked higher in indexing system
to be used as jigsaw puzzle.as an additonal help we can use Extension
Assira to make our extension smarter.please give your valuable suggestions as we
can work to improve this amazing project. at
https://www.mediawiki.org/wiki/Talk:CAPTCHA :)
Thank YouAalekh Nigam"aalekhN"
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