estimation of subpixel values from images in Python

 

This question already has an answer here:

  • How to get the image pixel at real locations in opencv? 4 answers

    • There are two common methods:

  • bilinear interpolation,

  • bicubic interpolation.

    • These evaluate an intermediate value, based on the values at four or sixteen neighboring pixels, using weighting functions based on the fractional parts of the coordinates.

    Lookup these expressions.

    From my experience, the bilinear quality is often sufficient.

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