feat(bounding-box): add scale_uniform method for consistent scaling

feat(gui): display face ROIs in comparison results

refactor(bridge): pad detected face bounding boxes uniformly

bounding-box/src/lib.rs

@@ -163,6 +163,21 @@ impl<T: Num, const D: usize> AxisAlignedBoundingBox<T, D> {
         }
     }
 
+    pub fn scale_uniform(self, scalar: T) -> Self
+    where
+        T: core::ops::MulAssign,
+        T: core::ops::DivAssign,
+        T: core::ops::SubAssign,
+    {
+        let two = T::one() + T::one();
+        let new_size = self.size * scalar;
+        let new_point = self.point.coords - (new_size - self.size) / two;
+        Self {
+            point: Point::from(new_point),
+            size: new_size,
+        }
+    }
+
     pub fn contains_bbox(&self, other: &Self) -> bool
     where
         T: core::ops::AddAssign,
@@ -270,15 +285,17 @@ impl<T: Num, const D: usize> AxisAlignedBoundingBox<T, D> {
         })
     }
 
-    // pub fn as_<T2>(&self) -> Option<Aabb<T2, D>>
-    // where
-    //     T2: Num + simba::scalar::SubsetOf<T>,
-    // {
-    //     Some(Aabb {
-    //         point: Point::from(self.point.coords.as_()),
-    //         size: self.size.as_(),
-    //     })
-    // }
+    pub fn as_<T2>(&self) -> Aabb<T2, D>
+    where
+        T2: Num,
+        T: num::cast::AsPrimitive<T2>,
+    {
+        Aabb {
+            point: Point::from(self.point.coords.map(|x| x.as_())),
+            size: self.size.map(|x| x.as_()),
+        }
+    }
+
     pub fn measure(&self) -> T
     where
         T: core::ops::MulAssign,