3A2A: 3D-Assisted 2D-Animation Character Pipeline

Dadfar, Pollard

Animation pipeline that creates NPR hand-drawn character sketches from stick figures by algorithmically sketching over a toon-shaded posed 3D character model sequence. If anyone can draw stick figures, then anyone can animate.

ICIG 2021

[ Paper ] [ Video ]

Autonomous Environment Texturing of Procedurally Generated Cities

Dadfar, Huang, Celik

By training style transfer algorithms on labeled street photographs from the Cityscapes and GTA V dataset, we can apply these stylizations onto our pre-recorded segmented city to autonomously texture our environments, lessening the need for human-design and intervention when creating 3D interactive environments.

CCGIV 2021

[ Paper ] [ Video ]

Frequency-Based Texture Caching

Dadfar, Yang

We propose a new cache eviction policy that combines a baseline LRU ranking with texture access frequency to compute an eviction score that evicts textures from the cache that have not been recently used and have a low probability of being accessed in the future. We find that our algorithm does increasingly better than pure LRU for higher cache associativities.

[ Paper ]

Japanese-Style Toon-Based Water Shader

Dadfar, Welling

Produces a Non-Photo-Realistic (NPR) water shader inspired by The Great Wave off Kanagawa by Katsushika Hokusai. We perform vertex position updates based on interpolated spline calculations on the CPU, laplacian height diffusion in the vertex shader, and thresholding on position, curvature, and heightmap information in the fragment shader.

[ Paper ] [ Demo ] [ Code ]

An Analysis of Deferred Tile-Shading

Dadfar, O'Toole

Implemented deferred shading into a tile-based rasterization pipeline coded on the CPU using intel intrinsics. We find an evident trade-off in the speedup of deferring rasterization and the penalty of memory accessing in the G-buffer that lead to results that only merely improve temporal performance in more complex scenes.

[ Writeup ]

3D Global Registration Using ICP and Branch-&-Bound Search

Pillai, Dadfar, Yang

Global registration of 2 point clouds using a Branch and Bound (BnB) search over the euclidean transformation space with ICP sub-routines to overcome the local minima that regular ICP would get stuck in.

[ Paper ]

Stabilizing Object Lighting Under Variable Lighting Conditions in Video

Dadfar, O'Toole

Light-stabilization algorithm that takes into account object BRDFs to relight sequences of frames subjected to variable lighting conditions. We compute illumination changes in objects independently and apply a calculated relighting mask to a sequence of video frames to stabilize changes in illumination.

[ Paper ]