diff --git a/src/database/db_manager.py b/src/database/db_manager.py
index 039786d..1a331e8 100644
--- a/src/database/db_manager.py
+++ b/src/database/db_manager.py
@@ -13,8 +13,9 @@ import hashlib
 import yaml
 
 from src.utils.logger import get_logger
+from src.utils.image import Image
 
-IMAGE_EXTENSIONS = (".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp")
+IMAGE_EXTENSIONS = tuple(Image.SUPPORTED_EXTENSIONS)
 
 logger = get_logger(__name__)
 
diff --git a/src/gui/tabs/annotation_tab.py b/src/gui/tabs/annotation_tab.py
index 6927aba..83ca894 100644
--- a/src/gui/tabs/annotation_tab.py
+++ b/src/gui/tabs/annotation_tab.py
@@ -168,7 +168,7 @@ class AnnotationTab(QWidget):
             self,
             "Select Image",
             start_dir,
-            "Images (*.jpg *.jpeg *.png *.tif *.tiff *.bmp)",
+            "Images (*" + " *".join(Image.SUPPORTED_EXTENSIONS) + ")",
         )
 
         if not file_path:
diff --git a/src/gui/tabs/detection_tab.py b/src/gui/tabs/detection_tab.py
index 364783f..7dbef1c 100644
--- a/src/gui/tabs/detection_tab.py
+++ b/src/gui/tabs/detection_tab.py
@@ -27,6 +27,7 @@ from src.utils.config_manager import ConfigManager
 from src.utils.logger import get_logger
 from src.utils.file_utils import get_image_files
 from src.model.inference import InferenceEngine
+from src.utils.image import Image
 
 
 logger = get_logger(__name__)
@@ -236,7 +237,7 @@ class DetectionTab(QWidget):
             self,
             "Select Image",
             start_dir,
-            "Images (*.jpg *.jpeg *.png *.tif *.tiff *.bmp)",
+            "Images (*" + " *".join(Image.SUPPORTED_EXTENSIONS) + ")",
         )
 
         if not file_path:
diff --git a/src/gui/tabs/training_tab.py b/src/gui/tabs/training_tab.py
index 257d3c2..2fce300 100644
--- a/src/gui/tabs/training_tab.py
+++ b/src/gui/tabs/training_tab.py
@@ -34,20 +34,13 @@ from PySide6.QtWidgets import (
 from src.database.db_manager import DatabaseManager
 from src.model.yolo_wrapper import YOLOWrapper
 from src.utils.config_manager import ConfigManager
-from src.utils.image import convert_grayscale_to_rgb_preserve_range
+from src.utils.image import Image, convert_grayscale_to_rgb_preserve_range
 from src.utils.logger import get_logger
 
 
 logger = get_logger(__name__)
 
-DEFAULT_IMAGE_EXTENSIONS = {
-    ".jpg",
-    ".jpeg",
-    ".png",
-    ".tif",
-    ".tiff",
-    ".bmp",
-}
+DEFAULT_IMAGE_EXTENSIONS = set(Image.SUPPORTED_EXTENSIONS)
 
 
 class TrainingWorker(QThread):
diff --git a/src/utils/config_manager.py b/src/utils/config_manager.py
index 5b909ff..c6d1979 100644
--- a/src/utils/config_manager.py
+++ b/src/utils/config_manager.py
@@ -7,6 +7,7 @@ import yaml
 from pathlib import Path
 from typing import Any, Dict, Optional
 from src.utils.logger import get_logger
+from src.utils.image import Image
 
 
 logger = get_logger(__name__)
@@ -46,14 +47,7 @@ class ConfigManager:
             "database": {"path": "data/detections.db"},
             "image_repository": {
                 "base_path": "",
-                "allowed_extensions": [
-                    ".jpg",
-                    ".jpeg",
-                    ".png",
-                    ".tif",
-                    ".tiff",
-                    ".bmp",
-                ],
+                "allowed_extensions": Image.SUPPORTED_EXTENSIONS,
             },
             "models": {
                 "default_base_model": "yolov8s-seg.pt",
@@ -232,5 +226,5 @@ class ConfigManager:
     def get_allowed_extensions(self) -> list:
         """Get list of allowed image file extensions."""
         return self.get(
-            "image_repository.allowed_extensions", [".jpg", ".jpeg", ".png"]
+            "image_repository.allowed_extensions", Image.SUPPORTED_EXTENSIONS
         )
diff --git a/src/utils/file_utils.py b/src/utils/file_utils.py
index 019852e..c7730dd 100644
--- a/src/utils/file_utils.py
+++ b/src/utils/file_utils.py
@@ -6,6 +6,7 @@ import os
 from pathlib import Path
 from typing import List, Optional
 from src.utils.logger import get_logger
+from src.utils.image import Image
 
 
 logger = get_logger(__name__)
@@ -28,7 +29,7 @@ def get_image_files(
         List of absolute paths to image files
     """
     if allowed_extensions is None:
-        allowed_extensions = [".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp"]
+        allowed_extensions = Image.SUPPORTED_EXTENSIONS
 
     # Normalize extensions to lowercase
     allowed_extensions = [ext.lower() for ext in allowed_extensions]
@@ -204,7 +205,7 @@ def is_image_file(
         True if file is an image
     """
     if allowed_extensions is None:
-        allowed_extensions = [".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp"]
+        allowed_extensions = Image.SUPPORTED_EXTENSIONS
 
     extension = Path(file_path).suffix.lower()
     return extension in [ext.lower() for ext in allowed_extensions]
diff --git a/tests/test_image.py b/tests/test_image.py
index 88b617f..1ddb206 100644
--- a/tests/test_image.py
+++ b/tests/test_image.py
@@ -27,7 +27,7 @@ class TestImage:
 
     def test_supported_extensions(self):
         """Test that supported extensions are correctly defined."""
-        expected_extensions = [".jpg", ".jpeg", ".png", ".tif", ".tiff", ".bmp"]
+        expected_extensions = Image.SUPPORTED_EXTENSIONS
         assert Image.SUPPORTED_EXTENSIONS == expected_extensions
 
     def test_image_properties(self, tmp_path):