automatic spell correcting pen

We have written a matlab code to detect a single character. These individual characters are combined to form a word and the word is compared with inbuilt dictionary. If the word is present there is no output, if the word is not present a message is displayed on runtime window of matlab that the word is wrong. Till now we have taken photos of individual characters in mobile and was sent to laptop with Bluetooth/cable. The hardware required is a small camera fixed to a normal pen which should capture images of characters in real time as we are writing the words and it has to be sent to the laptop for comparison. We don’t know how to send captured image to laptop in real time and we don’t know when the next photo has to be captured. Ex: if we are writing APPLE, after writing A, image of A has to be taken before we write letter P. if the image is captured after writing half of P and if the captured image has A and half of P, the code doesn’t work. We don’t know what the criteria for taking the next picture is. The image captured must be like the photo that we have in the attachment sent.