preprocessor_config.json

{
  "do_resize": true,
  "size": {"height": 299, "width": 299},
  "do_normalize": false,
  "do_rescale": true,
  "rescale_factor": 0.00392156862745098,
  "image_mean": null,
  "image_std": null,
  "feature_extractor_type": "custom",
  "notes": "Grayscale IFCB ROI -> resize 299x299 -> duplicate to 3 channels -> divide by 255. No ImageNet mean/std normalization."
}