From cf9de0b9a243b73b03adc0866ba71386fb3abf38 Mon Sep 17 00:00:00 2001
From: jayanttalwar713 <60803835+jayanttalwar713@users.noreply.github.com>
Date: Sat, 21 Mar 2026 13:47:17 -0400
Subject: [PATCH] Refactor approach_regions.py with segmentation methods

---
 regions/approach_regions.py | 49 +++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

diff --git a/regions/approach_regions.py b/regions/approach_regions.py
index 546a029..9a49f0c 100644
--- a/regions/approach_regions.py
+++ b/regions/approach_regions.py
@@ -167,3 +167,52 @@ def harris_corners(image):
     result[dst > 0.01 * dst.max()] = [0, 0, 255]
 
     return result
+
+
+
+def otsu_threshold(image):
+    """
+    Applies Otsu's thresholding.
+    Returns:
+        binary_image: thresholded image
+        region_map: 0/1 labels
+        num_regions: 2
+    """
+    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+    _, binary = cv2.threshold(
+        gray,
+        0,
+        255,
+        cv2.THRESH_BINARY + cv2.THRESH_OTSU
+    )
+
+    region_map = (binary > 0).astype(int)
+    num_regions = 2
+
+    return binary, region_map, num_regions
+
+
+def adaptive_threshold(image):
+    """
+    Applies adaptive thresholding.
+    Returns:
+        binary_image: thresholded image
+        region_map: 0/1 labels
+        num_regions: 2
+    """
+    gray = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
+
+    binary = cv2.adaptiveThreshold(
+        gray,
+        255,
+        cv2.ADAPTIVE_THRESH_GAUSSIAN_C,
+        cv2.THRESH_BINARY,
+        11,   
+        2     
+    )
+
+    region_map = (binary > 0).astype(int)
+    num_regions = 2
+
+    return binary, region_map, num_regions