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Projection keyboard.Hi I am muraleekrishna with my new project virtual key board lets
see that.projection keyboard is a keyboardwhich has a projector which projects image of a
key board onto a normal surface.The user just presses the image on the surface to input
the values.Projector uses LED LASER as light source.The image of keyboard is imprinted
on a trasperent slide.Here I have used normal IR camera to detect key press.The OPencv library
uses this camera to detect keypresses. There is a film coated to the les to decrease the noise.The IR light
source emit IR rayswhich is used to generate a blob.The IR rays reflected from tip of finger is detected using
the camera, positioned above.Using BLOB detection techniques the location of
the center
of the blob and the correcponding
key
is identified.