{
  "title": "DualView image compression quality benchmark",
  "dateModified": "2026-06-06",
  "reference": "test-assets/image/original/test-pattern.png",
  "method": "Sharp RGB decode; PSNR from RGB mean squared error; global luminance SSIM-style approximation.",
  "results": [
    {
      "id": "jpeg95",
      "label": "JPEG quality 95",
      "source": "test-assets/image/variations/test-pattern-jpeg95.jpg",
      "sizeKb": 182.1,
      "width": 1920,
      "height": 1080,
      "mse": 0.9,
      "psnrDb": 48.59,
      "ssimApprox": 1
    },
    {
      "id": "jpeg60",
      "label": "JPEG quality 60",
      "source": "test-assets/image/variations/test-pattern-jpeg60.jpg",
      "sizeKb": 64.89,
      "width": 1920,
      "height": 1080,
      "mse": 15.92,
      "psnrDb": 36.11,
      "ssimApprox": 0.9993
    },
    {
      "id": "jpeg30",
      "label": "JPEG quality 30",
      "source": "test-assets/image/variations/test-pattern-jpeg30.jpg",
      "sizeKb": 45.28,
      "width": 1920,
      "height": 1080,
      "mse": 31.09,
      "psnrDb": 33.2,
      "ssimApprox": 0.9987
    },
    {
      "id": "blurred",
      "label": "Blurred PNG",
      "source": "test-assets/image/variations/test-pattern-blurred.png",
      "sizeKb": 398.25,
      "width": 1920,
      "height": 1080,
      "mse": 83.02,
      "psnrDb": 28.94,
      "ssimApprox": 0.9969
    },
    {
      "id": "noisy",
      "label": "Noisy PNG",
      "source": "test-assets/image/variations/test-pattern-noisy.png",
      "sizeKb": 3875.42,
      "width": 1920,
      "height": 1080,
      "mse": 144.96,
      "psnrDb": 26.52,
      "ssimApprox": 0.9938
    },
    {
      "id": "sharpened",
      "label": "Sharpened PNG",
      "source": "test-assets/image/variations/test-pattern-sharpened.png",
      "sizeKb": 274.91,
      "width": 1920,
      "height": 1080,
      "mse": 27.12,
      "psnrDb": 33.8,
      "ssimApprox": 0.9983
    },
    {
      "id": "bright",
      "label": "Brightened PNG",
      "source": "test-assets/image/variations/test-pattern-bright.png",
      "sizeKb": 215.47,
      "width": 1920,
      "height": 1080,
      "mse": 452.21,
      "psnrDb": 21.58,
      "ssimApprox": 0.9862
    },
    {
      "id": "high-contrast",
      "label": "High-contrast PNG",
      "source": "test-assets/image/variations/test-pattern-high-contrast.png",
      "sizeKb": 224.97,
      "width": 1920,
      "height": 1080,
      "mse": 132.39,
      "psnrDb": 26.91,
      "ssimApprox": 0.9992
    }
  ]
}