公开(公告)号：US20240310294A1

公开(公告)日：2024-09-19

申请号：US18576046

申请日：2022-06-23

Applicant: SAFRAN

Inventor： Franck MICHAUD

IPC: G01N21/88 ,  G01N21/95

CPC classification number: G01N21/8851 ,  G01N21/8806 ,  G01N21/95 ,  G01N2021/8848 ,  G01N2201/0633

Abstract: A method for inspecting the surface finish of a cast part made of single-crystal metal, the surface of the part potentially containing defects resulting from an inhomogeneity of orientation of at least a crystal lattice of the single-crystal metal, the method including acquiring, using an image-acquiring device, a series of images of the cast part illuminated by a polarized and collimated illuminating device, then analysing the series of images by an image-processing device, each image of the series of images being taken at a different polarization angle.

公开(公告)号：US20230342961A1

公开(公告)日：2023-10-26

申请号：US17757795

申请日：2020-12-14

Applicant: SAFRAN

Inventor： Franck MICHAUD ,  Ahmed Nasreddinne BENAICHOUCHE

IPC: G06T7/557 ,  G06V10/141 ,  H04N23/957 ,  G06T7/521 ,  G06V10/60

CPC classification number: G06T7/557 ,  G06T7/521 ,  G06V10/141 ,  G06V10/60 ,  H04N23/957

Abstract: In the field of determining the three-dimensional profile of a surface, a system and a method for determining such a three-dimensional profile use a plenoptic camera and a structured lighting system. The method includes: acquiring a sequence of plenoptic images, each formed by a set of pixels each associated with a light intensity of an imaged surface element, and including a plurality of sub-images of the surface from different viewing angles, projecting onto the surface a sequence of structured images synchronised with the sequence of plenoptic images illumating each imaged surface element by a succession of light intensities different from the successions of light intensities which illuminate the other imaged surface elements, constructing, for each pixel of the plenoptic image, an intensity vector representing the succession of light intensities, and pairing each pixel of a sub-image with a pixel of another sub-image depending on a similarity of the intensity vectors.