Function opencv::gapi::warp_perspective_def

source · 
pub fn warp_perspective_def(
    src: &impl GMatTraitConst,
    m: &impl MatTraitConst,
    dsize: Size
) -> Result<GMat>
Expand description

Applies a perspective transformation to an image.

The function warpPerspective transforms the source image using the specified matrix:

block formula

when the flag [WARP_INVERSE_MAP] is set. Otherwise, the transformation is first inverted with invert and then put in the formula above instead of M. The function cannot operate in-place.

§Parameters

  • src: input image.
  • M: inline formula transformation matrix.
  • dsize: size of the output image.
  • flags: combination of interpolation methods ([INTER_LINEAR] or #INTER_NEAREST) and the optional flag #WARP_INVERSE_MAP, that sets M as the inverse transformation ( inline formula ).
  • borderMode: pixel extrapolation method ([BORDER_CONSTANT] or #BORDER_REPLICATE).
  • borderValue: value used in case of a constant border; by default, it equals 0.

§See also

warpAffine, resize, remap, getRectSubPix, perspectiveTransform

§Note

This alternative version of warp_perspective function uses the following default values for its arguments:

  • flags: cv::INTER_LINEAR
  • border_mode: cv::BORDER_CONSTANT
  • border_value: Scalar()