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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