Method for visual inspection and logging
AssigneeVision IO AS
InventorsØyvind Hovland, André Hognestad
Life of this patent
Estimating the term…
Abstract
A method and an arrangement for visual inspection and logging of oil and/or gas well pipes are provided. The arrangement comprises an inspection tool arranged to record, during the visual inspection, a plurality of images by recording means comprising gat least one fisheye lens. The method comprises guiding the inspection tool in an oil and/or gas well pipe, and to record a plurality of fisheye images during the guiding.
Claims9
A method performed by an arrangement for visual inspection of a pipe, the pipe being for at least one from the group consisting of oil and gas, the arrangement comprising an inspection tool arranged to record, during the visual inspection, a plurality of images by a recording means comprising at least one fisheye lens, the method comprising:
- guiding the inspection tool in the pipe;
- and
- recording by the recording means a plurality of fisheye images of the inside surface of the pipe while guiding the recording means through the pipe;
- transforming the recorded plurality of fisheye images into corresponding rectilinear images by:
- mapping the fisheye images onto a virtual projection dome using a linear scaled mapping function;
- placing a virtual camera in the center of the virtual projection dome;
- applying, by the virtual camera, a rectilinear pinhole projection to project the virtual projection dome into a planar view;
- and
- generating the corresponding rectilinear images based at least in part on the application of the rectilinear pinhole projection and a rendering of the virtual projection dome as a 3D object using GPU 3D rendering;
- and
- adapting the corresponding rectilinear images for view in a graphical user interface enabling a user to virtually move in the rectilinear images.
A system for visual inspection and logging of a pipe, the pipe being for at least one from the group consisting of oil and gas, the system comprising:
- an inspection tool arranged to record a plurality of images by recording means comprising at least one fisheye lens;
- guiding means adjusted to guide the inspection tool in the pipe while recording, by the recording means, a plurality of fisheye images of the inside surface of the pipe while guiding the recording means through the pipe;
- and
- transforming means adjusted to transform the recorded plurality of fisheye images into corresponding rectilinear images by:
- mapping the fisheye images onto a virtual projection dome using a linear scaled mapping function;
- placing a virtual camera in the center of the virtual projection dome;
- applying, by the virtual camera, a rectilinear pinhole projection to project the virtual projection dome into a planar view;
- and
- generating the corresponding rectilinear images based at least in part on the application of the rectilinear pinhole projection and a rendering of the virtual projection dome as a 3D object using GPU 3D rendering;
- and
- rectilinear means adjusted to adapt the corresponding rectilinear images for view in a graphical user interface enabling a user to virtually move in the rectilinear images.
Dependencies are inferred from the claim text.