Claims
- 1. A method for increasing image resolution in a palm print scanner, comprising the steps of:
(1) synchronizing a nutating mirror with a camera frame sync; (2) scanning a frame of an image at a first nutation position; (3) positioning the nutating mirror by a fraction of a pixel amount in one direction to obtain a next nutation position; (4) scanning the frame of another image at the next nutation position; (5) repeating steps (3) and (4) until an image is obtained for each nutation position needed; and (6) mapping sub-pixels from each of the images obtained in steps (2), (4), and (5) to an image of pixels having a higher resolution than the respective images of sub-pixels.
- 2. The method of claim 1, wherein step (6) comprises the steps of:
(a) gathering each image of sub-pixels from memory; (b) allocating memory for the higher resolution image; (c) mapping sub-pixels from the first nutation position image onto the higher resolution image; and (d) interlacing sub-pixels from each of the images obtained in steps (4) and (5) onto the higher resolution image.
- 3. A palm print imaging system, comprising:
a light emitting diode (LED); an illuminator mirror; a condenser lens; a conformable prism, wherein said LED, said illuminator mirror, and said condenser lens provide color illumination to said conformable prism to obtain an image reflected from said conformable platen; plurality of mirrors; a nutating mirror, wherein said plurality of mirrors direct said image to said nutating mirror; a driver for controlling said nutating mirror; and a camera for capturing said image,
wherein said camera provides signals to said driver to synchronize said nutating mirror with camera frame syncs.
- 4. The system of claim 3, wherein said conformable prism is spring loaded.
- 5. The system of claim 3, wherein said conformable prism is used as a palm platen.
- 6. The system of claim 3, wherein said nutating mirror is repositioned to obtain a plurality of images, wherein said plurality of images are used in an interlacing recombining scheme to obtain a higher resolution image.
- 7. The system of claim 3, wherein said nutating mirror is two-dimensional and programmable to allow movement in two different axial directions.
- 8. The system of claim 3, wherein said conformable prism is comprised of a silicone pad.
Parent Case Info
[0001] This application claims the benefit under 35 U.S.C. §119(e) of U.S. Provisional Application No. 60/255,890, filed Dec. 18, 2000, which is incorporated by reference herein in its entirety.
Provisional Applications (1)
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Number |
Date |
Country |
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60255890 |
Dec 2000 |
US |