{"artifact_id":"L1-049","layer":"L1","title":"Fundus Imaging (retinal photography)","domain":"Medical Imaging","sub_domain":"Non-mydriatic retinal colour imaging","physics_fingerprint":{"L_DAG":2.2,"title":"Fundus Imaging (retinal photography)","domain":"Medical Imaging","carrier":"photon","primitives":["L.fundus_flash","K.psf.eye_pupil","int.spatial"],"sub_domain":"Non-mydriatic retinal colour imaging","noise_model":"gaussian","problem_class":"linear_inverse","solution_space":"2D_retinal_image","difficulty_delta":1,"integration_axis":"spatial","sensing_mechanism":"fundus_imaging"},"observable_profile":{"metric":"PSNR_dB","regime":"Existence of the recovered 2D retinal image is guaranteed within the declared Omega bounds. Uniqueness holds on the measurement-supported subspace; out-of-support modes are controlled by the declared priors. Stability is well-conditioned (kappa_eff ~= 6); cataract_opacity dominates the stability cliff; reflex_artifact and the remaining mismatch parameters contribute higher-order bias terms. Additive gaussian thermal/electronic noise sets the irreducible data-fidelity floor, while mild Tikhonov or analytic inversion is sufficient at the nominal Omega point.","secondary":"SSIM"},"size_tiers":{"center_spec":{"omega":{"H":3000,"W":3000,"SNR_dB":35,"fov_deg":45,"pupil_mm":4.0,"misalignment":0.0,"reflex_artifact":0.0,"cataract_opacity":0.0},"input_format":"measurement_only","problem_class":"fundus","forward_operator":"fundus_forward","epsilon_fn_center":"33.0"},"omega_bounds":{"H":1024,"W":1024,"SNR_dB":[15.0,45.0],"fov_deg":[20,60],"pupil_mm":[2.0,8.0],"misalignment":[0.0,0.5],"reflex_artifact":[0.0,0.3],"cataract_opacity":[0.0,0.5],"pupil_size_variation":[0.0,0.3]},"epsilon_bounds":{"psnr_db":[5.0,45.0]},"allowed_problem_classes":["fundus"],"allowed_omega_dimensions":["H","W","fov_deg","pupil_mm","SNR_dB","cataract_opacity","reflex_artifact","misalignment","cataract_opacity","reflex_artifact","misalignment","pupil_size_variation"],"allowed_forward_operators":["fundus_forward"]},"hardness_fn":{"type":"epsilon_fn","delta":1,"kappa":120,"metric":"PSNR_dB"},"initiator_dataset":[{"name":"primary","weight":1.0,"ipfs_cid":null,"license_hash":null}],"status":"testnet","staked_pwm":0.0,"chain_hash":"0xd597946e16961f52230d2a0d7591520ad2f46f457aec566a2fc9c3ad61d95463","chain_tx_hash":"0x688799a15f479f828c91b5b039cf11aa5c9c9b5bf799447d7ada1c23a818d7f6","chain_block":41552302}