4D Hand-Object Interaction Reconstruction Pipeline Diagram
Overview
A three-stage pipeline in pastel rounded panels. It is an editable PowerPoint diagram adapted from the original paper figure under CC BY 4.0.
What the diagram shows
Stage 1 runs 2D HOI cue extraction, 3D geometry recovery, 4D motion tracking and isolated 4D fitting on an input video. Stage 2 takes interacting frames through a flow-matching generative model (U-shaped stack) from noisy to corrected HOI and initializes contact confidence. Stage 3 combines isolated 4D HOI and contact anchors in a contact-aware 4D optimization with ℒ_con, ℒ_pen, ℒ_sil, ℒ_anc and ℒ_temp loss terms. Every box, arrow, label and math term is a native shape you can recolor, resize and relabel for your own slides, posters or papers.
File format
The download contains .pptx (1 slide, 19.95 × 5.90 in; opens in PowerPoint, Keynote, WPS and LibreOffice Impress; Google Slides works too, but complex freeforms may shift slightly), .svg and .drawio. Includes preview.png (full resolution) and a 1200 px web preview.
Shapes and editing
The file has 79 native editable shapes: 40 auto-shapes, 13 text boxes, 2 freeforms, 24 lines/connectors (1 small group). 15 embedded images (see below). You can edit all text and loss labels, the three stage panels, flow boxes, the U-shaped model bars, the dashed callout, the vertical "Contact Initialization" bar, loss chips, connectors and a native flame icon.
Embedded images and fonts
15 items are embedded images: the input video film strip, bounding-box / mask stacks, the 3D hand-object renders and contact-confidence renders. Text uses Times New Roman, which is preinstalled on Windows and macOS (LibreOffice uses the metric-compatible Liberation Serif). Sub- and superscripts are real formatted text runs, not equation objects. The SVG keeps text as text; the draw.io file is a shape-by-shape conversion and may need small nudges. This is a faithful redraw for reuse, not the authors' original source file.
Source & license Adapted from Figure 2 of Open-CHOIR: Open-World Contact-Aware 4D Hand-Object Interaction Reconstruction by Hao Xu, Yilin Liu, Yinqiao Wang, Chi-Wing Fu, Niloy J. Mitra (arXiv:2605.20992, https://arxiv.org/abs/2605.20992; code: https://github.com/hxwork/CHOIR). Licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Redrawn as editable shapes; changes made by 叫我Alonzo就好了/alonzolab. Not endorsed by the original authors. Attribution to the original paper is required when you publish or share the figure; the exact credit line is in LICENSE-ATTRIBUTION.txt inside each download.