1. A method of imaging a scene, the method comprising: capturing a sequence of multiple subimages by an imaging sensor organized in multiple subsets of pixels, each of the subsets of pixels being assigned to capturing a corresponding one of the subimages; and for each of the subsets of pixels: obtaining samples of an output signal of the subsets of pixels during the exposure time; processing the obtained samples to evaluate the noise level and an averaged output signal; in response to the noise level being above a threshold, extending the exposure time to obtain further samples of the output signal of the pixels; and in response to the noise level being below the threshold, ending the exposure time for capturing the subimage.