Parrot Drones

Eng Hong Sron

Pierre Eline

This camera unit () comprises a high-resolution rolling shutter camera () and one or several low-resolution global shutter cameras (), for example monochromic spectral cameras. All the cameras are oriented in the same direction and are able to be triggered together to collect simultaneously a high-resolution image (I) and at least one low-resolution image (I-I) of a same scene viewed by the drone. Image processing means () determine the distortions of the wobble type present in the high-resolution image and absent from the low-resolution images, and combine the high-resolution image (I) and the low-resolution images (I-I) to deliver as an output a high-resolution image (I') corrected for these distortions.

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

The apparatus comprises a camera () with a digital sensor read by a mechanism of the rolling shutter type delivering video data (S) line by line. An exposure control circuit () adjusts dynamically the exposure time (t) as a function of the level of illumination of the scene that is captured. A gyrometer unit () delivers a gyrometer signal (S) representative of the instantaneous variations of attitude (&#x3c6;, &#x3b8;, &#x3c8;) of the camera, and a processing circuit () that receives the video data (S) and the gyrometer signal (S) delivers as an output video data processed and corrected for artefacts introduced by vibrations specific to the apparatus. An anti-wobble filter () dynamically modifies the gain of the gyrometer signal as a function of the exposure time (t), so as to reduce the gain of the filter when the exposure time increases, and vice versa.

Mobile appratus, in particular a rotary-wing drone, provided with a video camera delivering sequences of images dynamically corrected for the wobble effect

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Paris, France

Eng Hong Sron