High-resolution camera unit for a drone, with correction of the wobble-type distortions

An image processing method, comprising:

• acquiring (102;
• 204) an image (I0) at a first, high resolution, delivered by a camera of the rolling shutter type (16);
• acquiring (102;
• 202) at least one image (I1-I4) at a second, low resolution, lower than said first resolution, delivered by at least one respective camera of the global shutter type (18),
• the rolling shutter camera and the at least one global shutter camera having their optical axes oriented in the same direction and being able to be triggered together so as to collect simultaneously said high-resolution image (I0) and said at least one low-resolution image (I1-I4) of a same scene (12) viewed by the drone,
• characterized in that it further comprises:
• determining distortions of the wobble type present in the high-resolution image and absent from the at least one low-resolution image;
• combining the high-resolution image (I0) and of the at least one low-resolution image (I1-I4) to deliver as an output a high-resolution image corrected for said distortions;
• constructing (206) a representation of the scene from the at least one low-resolution image (I1-I4);
• determining (212) the movements of the camera unit undergone for the duration of the low-resolution image (I0) collection, from signals delivered by gyrometer, accelerometer and/or geolocation sensors;
• and
• projecting point by point (214), taking said movements into account, each pixel of the high-resolution image (I0) as a texture on said representation of the scene constructed from the at least one low-resolution image (I1-I4).