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Autocomplete Hand-drawn Animation

JUN XING LI-YI WEI TAKAAKI SHIRATORI KOJI YATANI

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Introduction

Interface

Sample Representation

u(s) = (p(s),m(s), a(s), t(s))

Neighborhood

Autocomplete Painting Repetitions

Global Similarity Analysis

Global Similarity Analysis

Initialization

Normalization

Refinement

Draw order coherent

Prediction Synthesis

Maintain the structures and details of previous frames
Fit the drawing in the current frame
observe the motions among the frames for temporal coherence
be general enough for various drawing styles and contents and yet fast enough for interaction.

Deformation Model:

Prediction Constraints

Implementation

Sample all strokes with an average of 15-pixel spacing uniform at low curvature regions
Adaptive at high curvature regions between 12 to 18-pixels

Set θ1 = 5, θ2 = 5, and θ3 = 0.5 for Equations (10) and (14), and ϕ1 = 50 in Equation (13)

Initialize κr = 1000, κs = 15, κf = 10, and κm = 1
κs is halved whenever |Ek − Ek−1| < 10−1 (1 + Ek), where Ek is the cost at the k-th iteration, until κs < 1
Since Equation (13) starts from the third frame, we set κm = 0 for the second frame

User Evaluation

Deformation Comparison

More Result

More Result