1. A method comprising: capturing a first plurality of low resolution images and a second plurality of low resolution images through a corresponding first sensor and a second sensor, the first sensor having a higher resolution than the second sensor; and estimating, through a processor, expansion coefficients of polyphase components of an enhanced resolution image based on the second plurality of low resolution images, the expansion coefficients being expressed in terms of the first plurality of low resolution images, and the polyphase components of the enhanced resolution image being shifted and downsampled versions thereof.