diff --git a/py/person_mask_ultra_v2.py b/py/person_mask_ultra_v2.py
index da7bf26..16ee9b9 100644
--- a/py/person_mask_ultra_v2.py
+++ b/py/person_mask_ultra_v2.py
@@ -134,12 +134,12 @@ class PersonMaskUltraV2:
                 detail_range = detail_erode + detail_dilate
                 if process_detail:
                     if detail_method == 'GuidedFilter':
-                        _mask = guided_filter_alpha(_image, _mask, detail_range // 6)
+                        _mask = guided_filter_alpha(_image, _mask, detail_range // 6 + 1)
                         _mask = tensor2pil(histogram_remap(_mask, black_point, white_point))
                     elif detail_method == 'PyMatting':
                         _mask = tensor2pil(
                             mask_edge_detail(_image, _mask,
-                                             detail_range // 8, black_point, white_point))
+                                             detail_range // 8 + 1, black_point, white_point))
                     else:
                         _trimap = generate_VITMatte_trimap(_mask, detail_erode, detail_dilate)
                         _mask = generate_VITMatte(orig_image, _trimap)
diff --git a/py/rembg_ultra_v2.py b/py/rembg_ultra_v2.py
index 61d6b02..77af17d 100644
--- a/py/rembg_ultra_v2.py
+++ b/py/rembg_ultra_v2.py
@@ -44,10 +44,10 @@ class RmBgUltraV2:
             detail_range = detail_erode + detail_dilate
             if process_detail:
                 if detail_method == 'GuidedFilter':
-                    _mask = guided_filter_alpha(i, _mask, detail_range // 6)
+                    _mask = guided_filter_alpha(i, _mask, detail_range // 6 + 1)
                     _mask = tensor2pil(histogram_remap(_mask, black_point, white_point))
                 elif detail_method == 'PyMatting':
-                    _mask = tensor2pil(mask_edge_detail(i, _mask, detail_range // 8, black_point, white_point))
+                    _mask = tensor2pil(mask_edge_detail(i, _mask, detail_range // 8 + 1, black_point, white_point))
                 else:
                     _trimap = generate_VITMatte_trimap(_mask, detail_erode, detail_dilate)
                     _mask = generate_VITMatte(orig_image, _trimap)
diff --git a/py/segment_anything_ultra_v2.py b/py/segment_anything_ultra_v2.py
index 11639eb..5487e54 100644
--- a/py/segment_anything_ultra_v2.py
+++ b/py/segment_anything_ultra_v2.py
@@ -5,6 +5,8 @@ NODE_NAME = 'SegmentAnythingUltra V2'
 
 SAM_MODEL = None
 DINO_MODEL = None
+previous_sam_model = ""
+previous_dino_model = ""
 
 class SegmentAnythingUltraV2:
     def __init__(self):
@@ -45,8 +47,15 @@ class SegmentAnythingUltraV2:
                                   prompt, ):
         global SAM_MODEL
         global DINO_MODEL
-        if SAM_MODEL is None: SAM_MODEL = load_sam_model(sam_model)
-        if DINO_MODEL is None: DINO_MODEL = load_groundingdino_model(grounding_dino_model)
+        global previous_sam_model
+        global previous_dino_model
+        
+        if previous_sam_model != sam_model:
+            SAM_MODEL = load_sam_model(sam_model)
+            previous_sam_model = sam_model
+        if previous_dino_model != grounding_dino_model:
+            DINO_MODEL = load_groundingdino_model(grounding_dino_model)
+            previous_dino_model = grounding_dino_model
         ret_images = []
         ret_masks = []
 
@@ -61,10 +70,10 @@ class SegmentAnythingUltraV2:
             detail_range = detail_erode + detail_dilate
             if process_detail:
                 if detail_method == 'GuidedFilter':
-                    _mask = guided_filter_alpha(i, _mask, detail_range // 6)
+                    _mask = guided_filter_alpha(i, _mask, detail_range // 6 + 1)
                     _mask = tensor2pil(histogram_remap(_mask, black_point, white_point))
                 elif detail_method == 'PyMatting':
-                    _mask = tensor2pil(mask_edge_detail(i, _mask, detail_range // 8, black_point, white_point))
+                    _mask = tensor2pil(mask_edge_detail(i, _mask, detail_range // 8 + 1, black_point, white_point))
                 else:
                     _trimap = generate_VITMatte_trimap(_mask, detail_erode, detail_dilate)
                     _mask = generate_VITMatte(_image, _trimap)