Briefly described, one embodiment is a method comprising storing, in the memory, a plurality of digital images received from the source, each image representing an event captured at a different respective time, using the processor to perform an analysis of the images, assigning a quality factor to each image, the quality factor being representative of the composition quality of the analysed images, and updating the memory to maintain images for which the assigned quality factor indicates a higher composition quality than an image captured at an earlier time.