I have an 8-bit grayscale image (e.g. 1000x1000) and rotated rectangular
ROI (typically 8x32).
I want to copy this rotated ROI to a regular C-style 2D array.
In other words I want to undo rotation of the ROI and convert it to
an easy-to-use 2D array.
The array's values must be computed using bilinear interpolation.
ROI's width and height are integers.
ROI's origin and rotation angle are "float"-s.
Does there exist an IPP function which would allow me to do this efficiently?
WarpBiliniar is more powerful than necessary for this taskand, as a result, isn't fast enough. All other geometric image transformation functions I checked seem to be not quite suitable. Am I missing something?