Diffusion, Flow Matching, and CRH-CFG
I independently completed the publicly available coursework and assignments from CMU 10-799, Diffusion and Flow Matching.
- Implemented
- DDPM, straight-path Flow Matching, DDIM, Euler and Heun samplers, and conditional classifier-free guidance.
- Experiment setting
- CelebA 64×64; Modal L40S; independent ResNet-18 evaluator.
- Conditional adherence
- Joint-target accuracy increased from 3.1% at w = 0 to 94.5% at w = 2. This result indicates stronger adherence, not general image quality.
- Sampler comparison
- At matched NFE, Heun showed no Pareto improvement.
- CRH-CFG probe
- Across 1,000 paired seeds per target, the descriptive result was 98.40% → 98.80% (+0.4 pp). It does not demonstrate improved preservation or conditional quality.
Engineering disclosure: Codex assisted engineering; I retained research design, interpretation, and validation.