CLAHE.create constructor
NewCLAHE returns a new CLAHE algorithm
For further details, please see: https:///docs.opencv.org/master/d6/db6/classcv_1_1CLAHE.html
Implementation
factory CLAHE.create([double clipLimit = 40, (int width, int height) tileGridSize = (8, 8)]) {
final p = calloc<cvg.CLAHE>();
final size = calloc<cvg.Size>()
..ref.width = tileGridSize.$1
..ref.height = tileGridSize.$2;
cffi.CLAHE_CreateWithParams(clipLimit, size.ref, p);
calloc.free(size);
return CLAHE._(p);
}