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Locating features in warped images

  • US 9,922,267 B1
  • Filed: 09/01/2016
  • Issued: 03/20/2018
  • Est. Priority Date: 09/01/2016
  • Status: Active Grant
First Claim
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1. A computer-implemented method for efficiently and accurately locating features of interest in warped images, the computer-implemented method comprising:

  • rendering, by an image rendering application hosted on a computing device, a source image and a first graphical user interface (GUI) element that identifies a feature of interest in the source image;

    accessing, by the image rendering application, a destination image, wherein the destination image is generated from the source image by warping at least a portion of the source image based on a backward map, wherein the backward map maps points from a mesh of the destination image to pixels from the source image, wherein the points of the mesh are arranged in tiles;

    generating, by the image rendering application, triangles from the tiles, wherein the triangles form a new mesh;

    generating, by the image rendering application, a forward map based on the triangles of the new mesh and the backward map, wherein the forward map maps points from a mesh of the source image to pixels from the destination image;

    identifying, by the image rendering application, a point from the mesh of the source image, wherein the point corresponds to a pixel of the source image and is associated with the feature of interest;

    locating, by the image rendering application, a pixel from the destination image based on the identified point and the forward map;

    associating, by the image rendering application, the located pixel in the destination image with the feature of interest; and

    rendering, by the image rendering application, the destination image and a second GUI element that identifies the feature of interest in the rendered destination image based on the located pixel in the destination image.

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