An imaging system comprising: an image sensor (102, 704) comprising a plurality of pixels arranged on a photo-sensitive surface thereof; and a processor (104, 702) configured to: - obtain information indicative of a gaze direction of a user's eye; - identify a gaze position on the photo-sensitive surface of the image sensor, based on the gaze direction of the user's eye; the imaging system being characterized in that the processor is further configured to: - determine a first region and a second region on the photo-sensitive surface of the image sensor based on the gaze position, wherein the first region includes and surrounds the gaze position, while the second region surrounds the first region; - read out first pixel data from each pixel of the first region; - select a set of pixels that are to be read out from the second region based on a predetermined sub-sampling pattern, wherein the predetermined sub-sampling pattern indicates locations of the pixels of the set; - read out second pixel data from the pixels of the selected set; - generate, from the second pixel data, pixel data of remaining pixels of the second region; and - process the first pixel data, the second pixel data and the generated pixel data to generate at least one image frame. an image sensor (102, 704) comprising a plurality of pixels arranged on a photo-sensitive surface thereof; and a processor (104, 702) configured to: - obtain information indicative of a gaze direction of a user's eye; - identify a gaze position on the photo-sensitive surface of the image sensor, based on the gaze direction of the user's eye; - obtain information indicative of a gaze direction of a user's eye; - identify a gaze position on the photo-sensitive surface of the image sensor, based on the gaze direction of the user's eye; the imaging system being characterized in that the processor is further configured to: - determine a first region and a second region on the photo-sensitive surface of the image sensor based on the gaze position, wherein the first region includes and surrounds the gaze position, while the second region surrounds the first region; - read out first pixel data from each pixel of the first region; - select a set of pixels that are to be read out from the second region based on a predetermined sub-sampling pattern, wherein the predetermined sub-sampling pattern indicates locations of the pixels of the set; - read out second pixel data from the pixels of the selected set; - generate, from the second pixel data, pixel data of remaining pixels of the second region; and - process the first pixel data, the second pixel data and the generated pixel data to generate at least one image frame. - determine a first region and a second region on the photo-sensitive surface of the image sensor based on the gaze position, wherein the first region includes and surrounds the gaze position, while the second region surrounds the first region; - read out first pixel data from each pixel of the first region; - select a set of pixels that are to be read out from the second region based on a predetermined sub-sampling pattern, wherein the predetermined sub-sampling pattern indicates locations of the pixels of the set; - read out second pixel data from the pixels of the selected set; - generate, from the second pixel data, pixel data of remaining pixels of the second region; and - process the first pixel data, the second pixel data and the generated pixel data to generate at least one image frame.