Dynamic auto-focus window selection that compensates for hand jitter

An image-capturing device, comprising:

• means for obtaining a first image frame having a first focus window;
• means for obtaining a second image frame having a second focus window;
• means for obtaining a first motion vector between the first and second image frames;
• and
• means for obtaining a third image frame having a third focus window adjusted by the first motion vector to cover substantially the same image portion as the first focus window.

An image-capturing device, comprising:

• an image sensor for capturing image frames;
• and
• an auto-focus module coupled to the image sensor, the auto-focus module configured to
• obtain a first image frame having a first focus window;
• obtain a second image frame having a second focus window;
• obtain a first motion vector between the first and second image frames;
• and
• obtain a third image frame having a third focus window adjusted by the first motion vector to cover substantially the same target image portion as the first focus window.

A computer-readable medium having one or more instructions operational on an image-capturing device to mitigate the effects of shaking during auto-focusing, which when executed by a processor causes the processor to:

• obtain a first image frame having a first focus window;
• obtain a second image frame having a second focus window;
• obtain a first motion vector between the first and second image frames;
• and
• obtain a third image frame having a third focus window adjusted by the first motion vector to cover substantially the same image portion as the first focus window.