System and method for sending a packet with position address and line scan data over an interface cable
View Patent ↗A system and method for sending a packet with a position address and line scan data from a first device over a 1394 interface to a second device. The present invention loads a camera, an illuminator, and a microprocessor with set-up instructions and a start pulse. The camera captures a line-by-line image of an object placed on the surface of a sliding prism. Position data, corresponding to the captured line-by-line image, is logged as the position address. The position address is combined with the line-by-line image to form a packet. The packet is sent to the second device for processing and viewing the image.
1. A method for communicating image data from a fingerprint scanning device having a camera and a sliding prism to a computer over a 1394 interface, comprising the steps of:
(a) receiving set-up instructions for the camera and calibration instructions for the fingerprint scanning device from the computer over the 1394 interface;
(b) loading the camera with the received set-up instructions;
(c) capturing line-by-line image data associated with an object placed on the sliding prism;
(d) generating absolute position data corresponding to the line-by-line image data, wherein the absolute position data is referred to as the position address data;
(e) generating a packet including the line-by-line image data and the corresponding position address data; and
(f) sending the packet to the computer over the 1394 interface.
2. The method of claim 1 , further comprising the steps of:
(g) decoding the packet at the computer to recover the line-by-line image data and the position address data; and
(h) forming an image of the object using the line-by-line image data and the position address data.
3. The method of claim 2 , further comprising the step of displaying the image on the computer.
4. The method of claim 1 , wherein step (e) further comprises the step of encoding the packet for 1394 data transmission.
5. The method of claim 1 , wherein step (d) further comprises the step of converting raw position data into the absolute position data.
6. The method of claim 1 , wherein step (c) further comprises the step of sending a start of line signal followed by the line-by-line image data.
7. The method of claim 1 , wherein step (c) comprises the step of capturing a line-by-line fingerprint image of a finger or fingers placed on the sliding prism.
8. The method of claim 1 , wherein step (f) comprises the step of sending the packet to a personal computer (PC).
9. The method of claim 8 , further comprising the step of displaying the image on a monitor attached to the computer.
10. The method of claim 1 , wherein step (b) further comprises initializing an illuminator and a microprocessor based on the received set-up and calibration instructions.
11. A system for communicating image data from a fingerprint scanning device having a camera and a sliding prism over a 1394 interface to a computer, comprising:
(a) means for receiving set-up instructions for the camera and calibration instructions for the fingerprint scanning device from the computer over the 1394 interface;
(b) means for loading the camera with the received set-up instructions;
(c) means for capturing line-by-line image data associated with an object placed on the sliding prism;
(d) means for generating absolute position data corresponding to the line-by-line image data, wherein the absolute position data is referred to as the position address data;
(e) means for generating a packet including the line-by-line image data and the corresponding position address data; and
(f) means for sending the packet to the computer over the 1394 interface.
12. The system of claim 11 , further comprising:
(g) means for decoding the packet at the computer to recover the line-by-line image data and the position address data; and
(h) means for forming an image of the object using the line-by-line image data and the position address data.
13. The system of claim 12 , further comprising means for displaying the image on the computer.
14. The system of claim 12 , further comprising means for displaying the image on a monitor attached to the computer.
15. The system of claim 11 , wherein said means for generating a packet further comprises means for encoding the packet for 1394 data transmission.
16. The system of claim 11 , wherein said means for generating position data further comprises means for converting raw position data into absolute position data.
17. The system of claim 11 , wherein said means for capturing further comprises means for sending a start of line signal followed by the line-by-line image data.
18. The system of claim 11 , wherein said means for capturing comprises means for capturing line-by-line image data of at least one finger placed on the sliding prism.
19. The system of claim 11 , wherein the computer is a personal computer (PC).
20. The system of claim 11 , further comprising means for initializing an illuminator and a microprocessor based on the received set-up and calibration instructions.