{ "validation_scope": "Same final latent; decoder only", "reference": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/native-b1.png", "native_size": [ 2048, 2048 ], "crop_xyxy": [ 768, 768, 1280, 1280 ], "heatmap_gain": 8, "metric_definition": { "psnr": "Full-resolution 8-bit RGB MSE, data range 255; null means infinity", "ssim": "scikit-image RGB structural_similarity, channel_axis=-1, data_range=255, default 7x7 window", "mae": "Full-resolution mean absolute 8-bit RGB error" }, "rows": [ { "label": "native-b1", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/native-b1.png", "png_sha256": "32af5e3b95919e79e0019058ec396824c5861f9a43a4fa50c7b20348e8d81933", "pixel_identical": true, "mae_8bit": 0.0, "max_error_8bit": 0, "psnr_db": null, "ssim_rgb": 1.0, "timings": { "decode_s": 5.739497271017171 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" }, { "label": "native-b4", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/native-b4.png", "png_sha256": "32af5e3b95919e79e0019058ec396824c5861f9a43a4fa50c7b20348e8d81933", "pixel_identical": true, "mae_8bit": 0.0, "max_error_8bit": 0, "psnr_db": null, "ssim_rgb": 1.0, "timings": { "decode_s": 2.6730494999792427 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" }, { "label": "compiled-b4", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/compiled-b4.png", "png_sha256": "32af5e3b95919e79e0019058ec396824c5861f9a43a4fa50c7b20348e8d81933", "pixel_identical": true, "mae_8bit": 0.0, "max_error_8bit": 0, "psnr_db": null, "ssim_rgb": 1.0, "timings": { "decode_s": 1.929837999981828 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" }, { "label": "native-b8", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/native-b8.png", "png_sha256": "a34540dbc2f0f2249df4799b71892d980923bdc972e8d4db5de7e9a9ab08b88a", "pixel_identical": false, "mae_8bit": 0.15126427014668783, "max_error_8bit": 5, "psnr_db": 55.96620402076142, "ssim_rgb": 0.9991664658666948, "timings": { "decode_s": 2.2933986249845475 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" }, { "label": "compiled-b8", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/compiled-b8.png", "png_sha256": "a34540dbc2f0f2249df4799b71892d980923bdc972e8d4db5de7e9a9ab08b88a", "pixel_identical": false, "mae_8bit": 0.15126427014668783, "max_error_8bit": 5, "psnr_db": 55.96620402076142, "ssim_rgb": 0.9991664658666948, "timings": { "decode_s": 1.6636835205135867 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" }, { "label": "coreml-CPU_AND_GPU", "image": "/Users/devin/Desktop/MiniMax-H3-Image-mlx/comparisons/optimization-v2/decoder-portrait/coreml-CPU_AND_GPU.png", "png_sha256": "ad830fa42d204982381787317eee53f4c662d512cbafe260a53e065b987c18c6", "pixel_identical": false, "mae_8bit": 0.2621665795644124, "max_error_8bit": 11, "psnr_db": 53.128439249639484, "ssim_rgb": 0.998681981765892, "timings": { "decode_s": 1.591182250645943 }, "steps": [ 0, 1, 2, 3, 4, 5 ], "timing_scope": "Warm decoder only; model loading excluded" } ], "interpretation": "Pixel similarity to the same seeded trajectory, not a measure of prompt adherence or perceptual quality." }