A system for capturing at least one image of a scene. The system estimates at least one value representative of the sharpness in at least one area of at least one initial captured image of a scene. The autofocus module captures the initial image with a predefined focus. On the basis of at least the value representative of the estimated sharpness, the system selects a first operating mode or a second operating mode. In the first mode, the autofocus module controls the focus of the system to capture a sharper image of the scene. In the second mode, the initial captured image or another captured image is processed by the digital processing unit, the other image being captured with the predefined focus.