This enumeration specifies types of interpolation used by ImageGear.

Values:

IG_INTERPOLATION_NONE	No interpolation.
IG_INTERPOLATION_AVERAGE	Average interpolation.
IG_INTERPOLATION_BILINEAR	Bilinear interpolation.
IG_INTERPOLATION_NEAREST_NEIGHBOR	Nearest neighbor interpolation.
IG_INTERPOLATION_PADDING	Resize by adding padding to the image or by cropping the image (this is not an interpolation method).
IG_INTERPOLATION_GRAYSCALE	Scale to Gray interpolation method. It applies to bi-tonal images, and produces a 8-bit grayscale image as a result.
IG_INTERPOLATION_PRESERVE_WHITE	Preserve White interpolation method.
IG_INTERPOLATION_PRESERVE_BLACK	Preserve Black interpolation method.
IG_INTERPOLATION_BICUBIC	Bi-cubic interpolation method.
IG_INTERPOLATION_CANVAS	Same as IG_INTERPOLATION_PADDING.