Image capturing for pattern recognition of electronic devices
An image capturing method and apparatus for pattern recognition of an electronic device are provided in which an electronic device is moved relative to a vision system for positioning the vision system over a target position on the electronic device, and when the vision system is positioned to view the target position, the vision system is operative to capture an image of the target position while the electronic device is undergoing relative motion with respect to the vision system without stopping. Thus, the time taken for pattern recognition can be significantly reduced.
1. An image capturing method for pattern recognition of a plurality of target positions on an electronic device to align the plurality of target positions, comprising the steps of:
mounting the electronic device on a positioning stage;
pre-storing coordinates of the plurality of target positions to be aligned;
moving the electronic device by the positioning stage relative to a vision system at a uniform velocity for positioning the vision system over the plurality of target positions on the electronic device;
while moving the electronic device at the uniform velocity, determining when the vision system is positioned over each of the coordinates of the target positions to view the target position on the electronic device; and
capturing an image of each of the target positions on the electronic device with the vision system while the electronic device is undergoing relative motion with respect to the vision system at the uniform velocity without stopping; and
using the images of the target positions to align the target positions.
2. The image capturing method as claimed in claim 1 , wherein the step of capturing an image of each of the target positions is triggered by a position and imaging control board that is operative to synchronize relative movement of the electronic device and image capturing by the vision system.
3. The image capturing method as claimed in claim 2 , wherein the step of determining when the vision system is positioned over each of the coordinates of the target positions further comprises the position and imaging control board receiving positional feedback from an encoder regarding a position of the electronic device.
4. The image capturing method as claimed in claim 2 , wherein the step of capturing an image of each of the target positions further comprises the steps of utilizing the position and imaging control board to:
activate a light source to illuminate the target position with high intensity lighting;
activate a camera to view the target position; and
activate a grabber board to acquire an image of the target position.
5. The image capturing method as claimed in claim 1 , wherein the uniform velocity is a highest speed at which a positioning stage on which the electronic device is mounted is configured to operate.
6. The image capturing method as claimed in claim 1 , wherein the vision system comprises a high intensity lighting source and a CCD camera connected to an image grabber board.
7. The image capturing method as claimed in claim 6 , wherein the lighting source comprises pulse lighting.
8. The image capturing method as claimed in claim 7 , wherein the lighting source comprises a coaxial lighting source and a ring lighting source.
9. The image capturing method as claimed in claim 6 , wherein the CCD camera has an exposure time of less than 1 millisecond.
10. The image capturing method as claimed in claim 1 , wherein the pattern that is recognized is an image of material that has been bonded so as to distinguish bonding quality of the bonded material.
11. An apparatus for capturing an image for pattern recognition of a plurality of target positions on an electronic device to align the plurality of target positions, comprising:
a device that is configured to pre-store coordinates of the plurality of target positions to be aligned;
a vision system for capturing images of the electronic device; and
a positioning stage on which is mounted the electronic device, the positioning stage being configured to move the electronic device at a uniform velocity relative to the vision system in order for the vision system to view each of the plurality of target positions on the electronic device;
wherein the vision system is configured to capture an image of each of the target positions on the electronic device when the vision system is positioned over each of the respective coordinates of the target positions and while the electronic device is undergoing relative motion with respect to the vision system at the uniform velocity without stopping, whereby to align the target positions.
12. The apparatus as claimed in claim 11 , further comprising a position and imaging control board that is configured to synchronize relative movement of the electronic device and image capturing by the vision system.
13. The apparatus as claimed in claim 12 , further comprising an encoder for providing positional feedback to the position and imaging control board regarding a position of the electronic device for determining when the vision system is positioned over each of the respective coordinates of the target positions on the electronic device.
14. The apparatus as claimed in claim 11 , wherein the uniform velocity is a highest speed at which the positioning stage is configured to operate.
15. The apparatus as claimed in claim 11 , wherein the vision system comprises a high intensity lighting source and a CCD camera connected to an image grabber board.
16. The apparatus as claimed in claim 15 , wherein the lighting source comprises pulse lighting.
17. The apparatus as claimed in claim 16 , wherein the lighting source comprises a coaxial lighting source and a ring lighting source.
18. The apparatus as claimed in claim 15 , wherein the CCD camera has an exposure time of less than 1 millisecond.
19. An apparatus for capturing an image for pattern recognition of a plurality of target positions on an electronic device to align the plurality of target positions, comprising:
a device that is configured to pre-store coordinates of a target position to be aligned;
a vision system for capturing images of the electronic device; and
a positioning stage on which is mounted the electronic device, the positioning stage being configured to move the electronic device relative to the vision system in order for the vision system to view each of the plurality of target positions on the electronic device;
wherein the vision system is configured to capture an image of each of the target positions on the electronic device when the vision system is positioned over each of the respective coordinates of the target positions and while the electronic device is undergoing relative motion with respect to the vision system without stopping, whereby to align the target positions.