Optical image stabilization method and apparatus
Disclosed are systems, devices, and methods for compensating for roll blur in an optical image stabilization (OIS) module. An OIS controller receives a selection for one or more areas of interest (AOI), each AOI associated with an image optimization point (IOP), and each IOP is associated with an X position (X pos ) and a Y position (Y pos ). The OIS controller receives gyroscope data comprising X axis rotation data (X gyro ), Y axis rotation data (Y gyro ) and Z axis rotation data (Z gyro ). The OIS controller generates adjusted X axis rotation data (X gyro_adj ) and Y axis rotation data (Y gyro_adj ), wherein X gyro_adj and Y gyro_adj based on the Z axis rotation data and the one or more IOPs and adjusts lens shift gain on the basis of X gyro_adj and Y gyro_adj and adjusts lens movement based at least in part on the lens shift gain.
1. A method for image stabilization comprising:
receiving a selection for one or more areas of interest (AOI), the AOI having one or more image optimization points (IOPs), wherein each IOP is associated with an X position (X pos ) and a Y position (Y pos );
receiving gyroscope data comprising X axis rotation data (X gyro ), Y axis rotation data (Y gyro ) and Z axis rotation data (Z gyro );
generating adjusted X axis rotation data (X gyro_adj ) and adjusted Y axis rotation data (Y gyro_adj ), based at least in part on the Z axis rotation data and the one or more IOPs;
generating an adjusted lens shift gain based at least in part on X gyro_adj and Y gyro_adj ; and
adjusting lens movement based at least in part on the adjusted lens shift gain.
2. The method of claim 1 , wherein:
X gyr_adj =X gyro ±Y pos *Z gyro
Y gyr_adj =Y gyro ±X pos *Z gyro .
3. The method of claim 1 , wherein the selection of one or more AOIs is based at least in part upon a user selection on a touchscreen.
4. The method of claim 1 , wherein the selection of one or more AOIs is based at least in part upon tracking an object within a field of view of a lens.
5. The method of claim 1 , wherein the selection of one or more AOIs is based upon an auto focus algorithm.
6. The method of claim 1 , wherein the selection of one or more AOIs is based upon a maximum blur measurement.
7. The method of claim 1 , wherein the one or more AOIs is defined in terms of pixels.
8. The method of claim 1 , wherein the one or more AOIs is defined in terms of deviation angle from image center.
9. The method of claim 1 , wherein the one or more IOPs is based upon a weighted average of the one or more AOIs.
10. An apparatus for adjusting lens movement, comprising:
a lens;
a gyroscope; and
an OIS controller, wherein the OIS controller is operably configured to:
receive a selection for one or more areas of interest (AOI), the AOI having one or more image optimization points (IOPs), wherein each IOP is associated with an X position (X pos ) and a Y position (Y pos );
receive gyroscope data comprising X axis rotation data (X gyro ), Y axis rotation data (Y gyro ) and Z axis rotation data (Z gyro );
adjust lens shift gain, wherein adjusting lens shift gain comprises generating adjusted X axis rotation data (X gyro_adj ) and Y axis rotation data (Y gyro_adj ), wherein X gyro_adj and Y gyro_adj are generated based at least in part on the Z axis rotation data and the one or more IOPs; and
adjust lens movement based at least in part on the lens shift gain.
11. The apparatus of claim 10 , wherein:
X gyr_adj =X gyro ±Y pos *Z gyro
Y gyr_adj =Y gyro ±X pos *Z gyro .
12. The apparatus of claim 10 , wherein the selection of one or more AOIs is based at least in part upon a user selection on a touchscreen.
13. The apparatus of claim 10 , wherein the selection of one or more AOIs is based at least in part upon tracking an object within a field of view of the lens.
14. The apparatus of claim 10 , wherein the selection of one or more AOIs is based upon an auto focus algorithm.
15. The apparatus of claim 10 , wherein the selection of one or more AOIs is based upon a maximum blur measurement.
16. The apparatus of claim 10 , wherein the one or more AOIs is defined in terms of pixels.
17. The apparatus of claim 10 , wherein the one or more AOIs is defined in terms of deviation angle from image center.
18. The apparatus of claim 10 , wherein the one or more IOPs is based upon a weighted average of the one or more AOIs.
19. An image stabilizer comprising:
means for adjusting lens movement to image movement in an optical wherein the means for adjusting lens movement comprises a lens and an image sensor optically coupled with the lens and a means for controlling the lens movement, wherein the means for controlling is operably configured for:
receiving a selection for one or more areas of interest (AOI), the AOI having one or more image optimization points (IOPs), wherein each IOP is associated with an X position (X pos ) and a Y position (Y pos );
receiving gyroscope data comprising X axis rotation data (X gyro ), Y axis rotation data (Y gyro ) and Z axis rotation data (Z gyro );
adjusting lens shift gain, wherein adjusting lens shift gain comprises generating adjusted X axis rotation data (X gyro_adj ) and Y axis rotation data (Y gyro_adj ), wherein X gyro_adj and Y gyro_adj are generated based at least in part on the Z axis rotation data and the one or more IOPs; and
adjusting lens movement based at least in part on the lens shift gain.
20. The image stabilizer of claim 19 , wherein:
X gyr_adj =X gyro ±Y pos *Z gyro
Y gyr_adj =Y gyro ±X pos *Z gyro .
21. The image stabilizer of claim 19 , wherein the selection of one or more AOIs is based at least in part upon a user selection on a touchscreen.
22. The image stabilizer of claim 19 , wherein the selection of one or more AOIs is based at least in part upon tracking an object within a field of view of the lens.
23. The image stabilizer of claim 19 , wherein the selection of one or more AOIs is based upon an auto focus algorithm.
24. The image stabilizer of claim 19 , wherein the selection of one or more AOIs is based upon a maximum blur measurement.
25. The image stabilizer of claim 19 , wherein the one or more AOIs is defined in terms of pixels.
26. The image stabilizer of claim 19 , wherein the one or more AOIs is defined in terms of deviation angle from image center.
27. The image stabilizer of claim 19 , wherein the one or more IOPs is based upon a weighted average of the one or more AOIs.