imwarp_quadrangles

imwarp_quadrangles(img: np.ndarray, polygons: Union[Polygons, np.ndarray]) -> np.ndarray

• Description: Applies perspective transformations to the input image based on multiple quadrilaterals, each defined by four points. The function automatically sorts the points in the following order: the first point is the top-left, the second is the top-right, the third is the bottom-right, and the fourth is the bottom-left. The target size of the transformed image is determined by the width and height of the minimum rotated bounding box of each polygon.

• Parameters

  • img (np.ndarray): The input image to be transformed.
  • polygons (Union[Polygons, np.ndarray]): A collection of polygons, each containing four points that define the transformation.

• Returns

  • List[np.ndarray]: A list of transformed images.

• Example

  import capybara as cb
  
  img = cb.imread('./resource/test_warp.jpg')
  polygons = cb.Polygons([[[602, 404], [1832, 530], [1588, 985], [356, 860]]])
  warp_imgs = cb.imwarp_quadrangles(img, polygons)

  For visual reference, please refer to imwarp_quadrangle.