Patent ID: 8341556

Claim:
A computer-implemented method for attention-free user input, the method comprising: receiving a first user input character on a writing surface; displaying the first user input character on the writing surface; receiving a next user input character on the writing surface on top of the displayed first user input character, wherein the next user input character is received irrespective of the area of entry of the first user input character on the writing surface without the user having to make a visual contact with the writing surface; determining whether the next user input character is the last user input character; recognizing user input when the next user input character is the last user input character, wherein recognizing the user input comprises: dividing each user input character into strokes, wherein a stroke of the strokes is a curve; partitioning the strokes into contiguous subsequences; and recognizing each subsequence as a letter, wherein the recognizing each subsequence as a letter includes using shapes and relative positions of strokes within the letter to recognize the letter and recognizing the letter ignores the position of the letter on the writing surface to recognize the letter; and displaying the user input in its order of receipt.