Read each face's eyes, and whether sunglasses hide them

Two MIT classifiers from the same author as the reference pipeline's
whole-body detector: OCEC answers P(open) for one 40×24 eye, SGC
P(sunglasses) for a 48×48 head. Both load in tract once their batch
dimension is pinned by tools/fix-face-model-shapes.sh, like the embedder.

The crops come through the same fitted similarity the aligned face does,
so an eye window is a constant in template units rather than a second
warp, and a tilted head yields an upright eye. Measured on 60 proxies
from the reference library: the eye window plateaus at 22×11, the S
variant beats M and L (which overfit their own domain), and for
sunglasses the aligned face beats a head framing but the higher of the
two catches 11 of 12 pairs against 9 for either alone.

The reading keeps both eyes and the sunglasses number apart, because a
wink averages to the least informative value and a lens of dark glass
draws a confident answer from the eye classifier — over a woman in
sunglasses it read the right eye 0.97 open. Sunglasses take precedence,
and a face behind them is neither open nor a blink.

core/dr-face/src/lib.rs

@@ -34,12 +34,15 @@
 pub mod align;
 pub mod assign;
 pub mod calibrate;
+#[cfg(feature = "inference")]
+pub mod classify;
 pub mod cluster;
 #[cfg(feature = "inference")]
 pub mod detect;
 #[cfg(feature = "inference")]
 pub mod embed;
 pub mod embedding;
+pub mod eyes;
 pub mod naming;
 pub mod neighbours;
 
@@ -65,10 +68,13 @@ pub mod neighbours;
 pub const MIN_CROP_EDGE: u32 = 1025;
 
 pub use align::{
-    warp, warp_pixels, Aligned112, Pixels, Similarity, ALIGNED_EDGE, ARCFACE_TEMPLATE,
+    eye_patches, head_views, warp, warp_pixels, Aligned112, EyePatch, EyePatches, HeadViews,
+    Pixels, Similarity, ALIGNED_EDGE, ARCFACE_TEMPLATE,
 };
 pub use assign::{identity_shares, RIVAL_FLOOR, TOP_MATCHES};
 pub use calibrate::{Calibration, Pairs, ReliabilityBand};
+#[cfg(feature = "inference")]
+pub use classify::{EyeClassifier, EyeModels, SunglassesClassifier};
 pub use cluster::{
     cluster, cluster_scored, split, Candidate, Cluster, Grouping, DEFAULT_MERGE_PROBABILITY,
 };
@@ -79,6 +85,7 @@ pub use embed::{Embedded, Embedder};
 pub use embedding::{
     in_gallery, read_f16_bytes, Embedding, ModelId, EMBEDDING_DIM, MIN_GALLERY_QUALITY,
 };
+pub use eyes::{EyeReading, EyeState, EYES_OPEN_THRESHOLD, SUNGLASSES_THRESHOLD};
 pub use naming::{name_for_instance, name_instances, NamedFace};
 
 /// What can go wrong between an image and a face.