1. A method for generating a morphing animation, comprising: performing hue preprocessing on adjacent images among multiple human face images to reduce a hue difference between the adjacent images; determining the quantity of intermediate frames between the hue preprocessed adjacent images according to a feature point differential of the hue preprocessed adjacent images, wherein the feature point differential is obtained through calculation according to a pixel distance of feature points that correspond to the adjacent images; generating the intermediate frame images through an image warping technology; inserting the intermediate frame images between the adjacent images; and generating a morphing animation from the multiple human face images and the intermediate frame images, wherein the hue preprocessing comprises: subtracting a mean hue value of a first image in the adjacent images from a mean hue value of a second image in the adjacent images to obtain the hue difference between the first image and the second image; obtaining a hue difference absolute value according to the hue difference, when the hue difference absolute value is greater than a first threshold, if the hue difference is greater than zero, decreasing a hue of each pixel in the first image or increasing a hue of each pixel in the second image, and if the hue difference is smaller than zero, increasing a hue of each pixel in the first image or decreasing a hue of each pixel in the second image.