The present invention relates to an
artificial intelligence-based virtual clothing fitting
system comprising: a body information
generating unit that generates body information including a user's height,
chest circumference,
waist circumference, and
hip circumference based on a body image of a user captured by a 3D camera; an avatar
generating unit that generates a 3D avatar based on the body information; a clothing
generating unit that generates a 3D clothing based on a previously stored clothing drawing; and a
simulation unit that fits the 3D clothing to the 3D avatar to generate
simulation information indicating the elongation rate, curvature, and
contact pressure of the 3D clothing. The
system includes a rendering unit that visually outputs the 3D avatar fitted with the 3D clothing based on the
simulation information, and the body information generation unit includes a preprocessing module that generates 3D
point cloud data from the body image and preprocesses the body image by performing background removal,
noise filtering, surface refinement, and alignment
processing on the
point cloud data; an extraction module that inputs the preprocessed body image into an
artificial intelligence model based on a PointNet architecture to extract feature points from the
point cloud data, wherein if the prediction reliability of the feature points falls below a preset threshold, the feature points are discarded or classified as targets for re-
estimation; and a computation module that generates the body information by performing a consistency check by comparing the distance between the feature points with standard
human body ratios, determining feature points exceeding a preset tolerance as errors, and calculating the user's height,
chest circumference,
waist circumference, and
hip circumference based on the distance between feature points that passed the consistency check. The simulation unit calculates the elongation rate, the curvature, and the
contact pressure by placing the 3D clothing on the surface of the 3D avatar, wherein the elongation rate is the 3D It is calculated based on the degree of
surface deformation of the garment, and the curvature is calculated based on the change in curved slope and folding distribution of the 3D garment.The above
contact pressure is calculated based on changes in the
contact position and contact distance between the 3D garment and the surface of the 3D avatar, and the simulation unit generates
predictive simulation information reflecting future
body shape changes of the 3D avatar through an
artificial intelligence prediction module comprising a
recurrent neural network (RNN) with a Long Short-
Term Memory (LSTM) or Gated Recurrent Unit (GRU) structure that performs time-series-based
body shape change modeling based on
user information including health status information, age information,
weight change trend information,
pregnancy status information, gestational week information,
hormone change history information, and seasonal environmental information; if the user is pregnant, the artificial intelligence prediction module generates a 3D avatar at a future point in time by reflecting changes in the
body shape of the user's
abdomen, hips, and thighs according to the gestational week information, and generates the
predictive simulation information by calculating the elongation rate, curvature, and contact pressure of the 3D garment for the 3D avatar at the future point in time; and based on the seasonal environmental information, reflects changes in the body shape of the
abdomen and upper body due to reduced
outdoor activity and
weight gain in winter, and sweat wicking and body heat dissipation efficiency in summer A 3D avatar at the future point in time is generated by reflecting a decrease in body shape due to increase, and the elongation rate, curvature, and contact pressure of the 3D clothing for the 3D avatar at the future point in time are calculated to generate the prediction simulation information. The rendering unit generates a rendering frame at the present point in
time based on the simulation information and generates a rendering frame at the future point in
time based on the prediction simulation information. The rendering frame at the present point in time and the rendering frame at the future point in time are output simultaneously, and enlarged display or
color contrast is applied to mesh areas where the difference in elongation rate, curvature, and contact pressure between points in time exceeds a preset reference value. According to the present invention, a digital clothing is virtually fitted to a 3D avatar generated based on the user's body information.By providing results visually and simultaneously quantitatively analyzing fitting responses—such as garment deformation patterns and fit characteristics—it is possible to offer a fitting experience close to actual wear in an online environment. This allows consumers to more accurately select clothing suitable for their body types, thereby reducing return rates and increasing purchase satisfaction. Furthermore, based on the quantitative analysis of wearing responses, various functions such as size recommendations, fit predictions, and wear simulations can be automated. This enables applications in diverse fields, including clothing design, virtual fitting shopping malls, and personalized recommendation systems, contributing to improved user experience, distribution efficiency, and the
digital transformation of the entire industry.