公开(公告)号：US12167142B2

公开(公告)日：2024-12-10

申请号：US17808667

申请日：2022-06-24

Applicant: STMicroelectronics (Research & Development) Limited ,  STMicroelectronics France

Inventor： Arnaud Bourge ,  Tanguy Le Dauphin ,  Antoine Drouot ,  Brian Douglas Stewart

IPC: H04N23/73 ,  H04N23/76

Abstract: In an embodiment an apparatus includes a scanning photographic sensor configured to acquire an image, according to an integration time of the sensor, of a scene illuminated with periodically emitted light pulses by a source, so that the image has a regular succession of bands with different luminosities when the integration time of the sensor is different from a period of the light pulses, a processor configured to generate a signature vector representative of the regular succession of bands with different luminosities being present in the image acquired by the photographic sensor, wherein the signature vector is independent of a reflectance of an objects of the scene and of a level of light in the scene, determine a frequency of the bands in the image on basis of the generated signature vector and determine the period of the pulses of the source on basis of the determined frequency of the bands in the image, and a controller configured to adjust the integration time of the photographic sensor so that the integration time is a multiple of the determined period of the light pulses of the source.

公开(公告)号：US11915438B2

公开(公告)日：2024-02-27

申请号：US17478643

申请日：2021-09-17

Applicant: STMicroelectronics France

Inventor： Manu Alibay ,  Olivier Pothier ,  Victor Macela ,  Alain Bellon ,  Arnaud Bourge

IPC: G06T7/521 ,  G01S17/08 ,  G06T7/55 ,  G06T7/593 ,  H04N13/207 ,  H04N13/254 ,  H04N13/271 ,  H04N13/00 ,  H04N13/204

CPC classification number: G06T7/521 ,  G01S17/08 ,  G06T7/55 ,  G06T7/593 ,  H04N13/207 ,  H04N13/254 ,  H04N13/271 ,  G06T2207/10012 ,  G06T2207/10021 ,  G06T2207/10028 ,  G06T2207/20212 ,  H04N2013/0081 ,  H04N13/204

Abstract: The method of determination of a depth map of a scene comprises generation of a distance map of the scene obtained by time of flight measurements, acquisition of two images of the scene from two different viewpoints, and stereoscopic processing of the two images taking into account the distance map. The generation of the distance map includes generation of distance histograms acquisition zone by acquisition zone of the scene, and the stereoscopic processing includes, for each region of the depth map corresponding to an acquisition zone, elementary processing taking into account the corresponding histogram.