7. Results

Reconstruction quality evaluated on a curated set of test images covering photographs, book covers, and documents. Flux.1 VAE (patch 8, 16 channels) is included as a reference at the same 12x compression ratio as the c64 variant.

7.1 Interactive Viewer

Open full-resolution comparison viewer — side-by-side reconstructions, RGB deltas, and latent PCA with adjustable image size.

7.2 Inference Settings

Setting	Value
Sampler	ddim
Steps	1
Schedule	linear
Seed	42
PDG	no_path_dropg
Batch size (timing)	4

All models run in bfloat16. Timings measured on an NVIDIA RTX Pro 6000 (Blackwell).

7.3 Global Metrics

Metric	semdisdiffae (1 step)	Flux.2 VAE
Avg PSNR (dB)	35.78	34.16
Avg encode (ms/image)	2.5	46.1
Avg decode (ms/image)	5.5	91.8

7.4 Per-Image PSNR (dB)

Image	semdisdiffae (1 step)	Flux.2 VAE
p640x1536:94623	35.44	33.50
p640x1536:94624	31.33	30.03
p640x1536:94625	35.05	33.98
p640x1536:94626	33.21	31.53
p640x1536:94627	32.54	30.53
p640x1536:94628	29.80	28.88
p960x1024:216264	46.37	45.39
p960x1024:216265	29.70	27.80
p960x1024:216266	47.15	46.20
p960x1024:216267	40.99	39.23
p960x1024:216268	38.47	36.13
p960x1024:216269	32.74	30.24
p960x1024:216270	36.23	34.18
p960x1024:216271	44.41	42.18
p704x1472:94699	43.80	41.79
p704x1472:94700	32.83	32.08
p704x1472:94701	39.00	37.90
p704x1472:94702	34.52	32.50
p704x1472:94703	32.81	31.35
p704x1472:94704	33.38	31.84
p704x1472:94705	39.70	37.44
p704x1472:94706	35.12	33.66
r256_p1344x704:15577	31.02	29.98
r256_p1344x704:15578	32.38	30.79
r256_p1344x704:15579	33.27	31.83
r256_p1344x704:15580	37.84	36.03
r256_p1344x704:15581	38.57	36.94
r256_p1344x704:15582	33.41	32.10
r256_p1344x704:15583	36.67	34.54
r256_p1344x704:15584	33.23	31.76
r256_p896x1152:144131	35.30	33.60
r256_p896x1152:144132	36.99	35.32
r256_p896x1152:144133	39.69	37.33
r256_p896x1152:144134	36.01	34.47
r256_p896x1152:144135	31.20	29.87
r256_p896x1152:144136	37.51	35.68
r256_p896x1152:144137	33.83	32.86
r256_p896x1152:144138	27.39	25.63
VAE_accuracy_test_image	36.64	35.25