We have developed a new input device, named MEMO-PEN. The MEMO-PEN is an ordinary ball point pen except for a capability of memorizing what it draws in itself. We can hold the handwriting in computers as it has been, and we can treat it aa image data for favorite application.The pen is carrying a small CCD close to its tip to capture a series of not whole but partial snapshots in its memory. This paper presents a brief description of the MEMO-PEN system and an experiment on reconstructing a whole image from the partial snapshots. We also show that we can satisfactorily work out a whole image for 80% of more than 50 examples.
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