1. A method for electronic imaging, comprising: controlling an image sensor to capture a first sequence of first input images at a first frame rate having a first spatial resolution, and to capture a second sequence of second input images, interleaved with the first sequence and having a second spatial resolution lower than the first spatial resolution; and processing the first and second sequences of the input images to generate an third sequence of output images at a second frame rate higher than the first frame rate and having a third spatial resolution higher than the second spatial resolution.