1. A camera unit ( 14 ) adapted to be placed on board a drone ( 10 ), comprising: a camera of the rolling shutter type ( 16 ) including a digital sensor of a first, high resolution; and at least one camera of the global shutter type ( 18 ) including a digital sensor of a second, low resolution, lower than said first resolution, the rolling shutter camera and the at least one global shutter having their optical axes oriented in the same direction and being able to be triggered together so as to collect simultaneously a high-resolution image (I 0 ) and at least one low-resolution image (I 1 -I 4 ) of a same scene ( 12 ) viewed by the drone, characterized in that it also comprises: image processing means ( 22 ), adapted to: determine distortions of the wobble type present in the high-resolution image and absent from the at least one low-resolution image; and combine the high-resolution image (I 0 ) and the at least one low-resolution image (I 1 -I 4 ) to deliver as an output a high-resolution image (I′ 0 ) corrected for said distortions.