Method for image and video virtual hairstyle modeling

A method for single view image and video virtual hairstyle modeling, comprising the following steps:

• (1) data acquisition and preprocessing of a single view hairstyle image:
• performing data acquisition on a target subject by using a digital device, and obtaining a hairstyle region from a single view image by segmenting with a paint selecting tool;
• (2) single view image-based calculation of a hairstyle orientation field:
• solving an orientation ambiguity problem of a single view image hairstyle orientation field, solving a spatial hairstyle orientation field by combining an unambiguous single view image hairstyle orientation field with a spatial hair volume region;
• (3) iterative construction of a static hairstyle model:
• by referring a scalp region which is defined on a fitted individual head model as a hair root location, starting to grow from a hair root sampling point in the spatial hairstyle orientation field to obtain an initial hairstyle model, and obtaining a uniformly distributed static hairstyle model which conforms to an original hairstyle region by refining an initial result iteratively, wherein the initial result is refined iteratively according to following means:
• obtaining an initial location of an alternative strand by sampling from a spatial hair volume, obtaining a series of alternative strands by means of bi-orientation tracing, and obtaining a refined static hairstyle model by cutting and regrouping the current hairstyle model and all the alternative strands;
• (4) video-based dynamic hairstyle modeling:
• based on the static hairstyle model obtained in step 3, calculating a movement of the hairstyle in a video by tracing a movement of a head model and estimating non-rigid deformation, generating a dynamic hairstyle model in every moment during the moving process, so that the dynamic hairstyle model fits naturally with the real movement of the hairstyle in the video;
• (5) exporting of the hairstyle modeling result:
• exporting and storing the modeling result in the aforementioned steps, wherein the modeling result comprises the static hairstyle model obtained in step 3 and the dynamic hairstyle model obtained in step 4.