performance_comparison_ablation_merged_summary.md

ChordEdit ablation notes

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Best values

• Structure Dist. (min): chord default sd tstart0.6 tend0.3 delta0.0 no cleanup = 0.0112
• PSNR (max): chord default sd tstart0.6 tend0.3 delta0.0 no cleanup = 27.1179
• LPIPS (min): chord default sd tstart0.6 tend0.3 delta0.0 no cleanup = 0.0526
• MSE (min): chord default sd tstart0.6 tend0.3 delta0.0 no cleanup = 0.0034
• SSIM (max): chord default sd tstart0.6 tend0.3 delta0.0 no cleanup = 0.8509
• CLIP Src. (max): chord default sd tstart0.6 tend0.3 delta0.0 cleanup = 25.4281
• CLIP Tgt. (max): chord default sd tstart0.9 tend0.5 delta0.15 cleanup = 25.5356
• CLIP-Edited (max): chord default sd tstart0.9 tend0.5 delta0.15 cleanup = 22.9703

Default reference

chord default sd tstart0.9 tend0.3 delta0.15 cleanup

• Structure Dist.: 0.0295
• PSNR: 22.6430
• LPIPS: 0.1185
• SSIM: 0.7675
• CLIP-Edited: 22.1554

Reading the ablation

• Lower t_start preserves the unedited region better but weakens the edit: tstart0.6 changes PSNR by +2.2401 and CLIP-Edited by -1.0514 versus default.
• Higher t_end pushes edit strength at the cost of preservation: tend0.5 changes CLIP-Edited by +0.8149 and PSNR by -2.2032 versus default.
• delta0.25 is the best single-parameter preservation point among the delta sweep, with PSNR 23.7389 and CLIP-Edited 21.8370.
• The delta0.0, t_start=0.6, no cleanup run is the preservation extreme, but it gives up 1.7732 CLIP-Edited points versus default.