公开(公告)号：US20230082331A1

公开(公告)日：2023-03-16

申请号：US17942459

申请日：2022-09-12

Applicant: APTIV TECHNOLOGIES LIMITED

Inventor： Marzena BANACH ,  Piotr BOGACKI ,  Rafal DLUGOSZ ,  Waldemar DWORAKOWSKI

IPC: G06V20/56 ,  G06T7/11

Abstract: A method of processing an image of a road having a road marker acquired by a vehicle-mounted camera to generate boundary data indicating a boundary of the road marker region of the image which represents the road marker, comprising: generating an LL sub-band image of an Mth level of an (M+1)-level discrete wavelet transform, DWT, decomposition of the image by iteratively low-pass filtering and down-sampling the image M times; generating a sub-band image of an (M+1)th level of the (M+1) level DWT decomposition by high-pass filtering the LL sub-band image and down-sampling a result of the high-pass filtering; and determining a boundary of a region of pixels of the sub-band image of the (M+1)th level, the region being surrounded by pixels having pixel values substantially different to the pixel values of the pixels in the region, the determined boundary indicating the boundary of the road marker region.

公开(公告)号：US20230084189A1

公开(公告)日：2023-03-16

申请号：US17942428

申请日：2022-09-12

Applicant: APTIV TECHNOLOGIES LIMITED

Inventor： Marzena BANACH ,  Piotr BOGACKI ,  Rafal DLUGOSZ ,  Waldemar DWORAKOWSKI

IPC: G06T7/12 ,  G06T3/40 ,  G06T5/20

Abstract: A method of processing an image of a scene including a road acquired by a vehicle-mounted camera to generate boundary data indicative of a boundary of an image region which represents an unoccupied area of the road, comprising: generating (S10) an LL sub-band image of an Nth level of an (N+1)-level discrete wavelet transform, DWT, decomposition of the image by iteratively low-pass filtering and down-sampling the image N times, where N is an integer equal to or greater than one; generating (S20) a sub-band image of an (N+1)th level by high-pass filtering the LL sub-band image of the Nth level, and down-sampling a result of the high-pass filtering, such that the sub-band image of the (N+1)th level has a pixel region having substantially equal pixel values representing the unoccupied area of the road in the image; and generating (S30) the boundary data by determining a boundary of the pixel region.