Computes the source location of an extrapolated pixel.

loc = cv.borderInterpolate(p, len)
[...] = cv.borderInterpolate(..., 'OptionName', optionValue, ...)

Input

• p 0-based coordinate of the extrapolated pixel along one of the axes, likely p < 0 or p >= len.
• len Length of the array along the corresponding axis.

Output

• loc Pixel coordinate along the specified axis.

Options

• BorderType Border type, one of:
  • Constant iiiiii|abcdefgh|iiiiiii with some specified i
  • Replicate aaaaaa|abcdefgh|hhhhhhh
  • Reflect fedcba|abcdefgh|hgfedcb
  • Reflect101 gfedcb|abcdefgh|gfedcba
  • Wrap cdefgh|abcdefgh|abcdefg
  • Default same as 'Reflect101' (default) When BorderType=='Constant', the function always returns -1, regardless of p and len.

The function computes and returns the coordinate of a donor pixel corresponding to the specified extrapolated pixel when using the specified extrapolation border mode.

Normally, the function is not called directly. It is used inside filtering functions and also in cv.copyMakeBorder.