Fix: Use actual COCO category IDs (not re-indexed)

README.md

@@ -35,20 +35,37 @@ A refined COCO-format dataset for detecting US Dollar currency and classifying w
 
 ## Class Mapping (24 classes)
 
-| ID | Class Name | ID | Class Name |
-|----|------------|-----|------------|
-| 0 | 100USD-Back | 12 | Counterfeit 100 USD Back |
-| 1 | 100USD-Front | 13 | Counterfeit 100 USD Front |
-| 2 | 10USD-Back | 14 | Counterfeit 10USD Front |
-| 3 | 10USD-Front | 15 | Counterfeit 1USD Front |
-| 4 | 1USD-Back | 16 | Counterfeit 50USD Front |
-| 5 | 1USD-Front | 17 | Counterfeit 10USD Back |
-| 6 | 20USD-Back | 18 | Counterfeit 5USD Back |
-| 7 | 20USD-Front | 19 | Counterfeit 20USD Back |
-| 8 | 50USD-Back | 20 | Counterfeit 20USD Front |
-| 9 | 50USD-Front | 21 | Counterfeit 1USD Back |
-| 10 | 5USD-Back | 22 | Counterfeit 5USD Front |
-| 11 | 5USD-Front | 23 | Counterfeit 50USD Back |
+### Regular USD (12 classes)
+| ID | Class Name |
+|----|------------|
+| 2 | 100USD-Back |
+| 3 | 100USD-Front |
+| 5 | 10USD-Back |
+| 6 | 10USD-Front |
+| 8 | 1USD-Back |
+| 9 | 1USD-Front |
+| 11 | 20USD-Back |
+| 12 | 20USD-Front |
+| 15 | 50USD-Back |
+| 16 | 50USD-Front |
+| 18 | 5USD-Back |
+| 19 | 5USD-Front |
+
+### Counterfeit USD (12 classes)
+| ID | Class Name |
+|----|------------|
+| 21 | Counterfeit 100 USD Back |
+| 22 | Counterfeit 100 USD Front |
+| 24 | Counterfeit 10USD Front |
+| 26 | Counterfeit 1USD Front |
+| 31 | Counterfeit 50USD Front |
+| 33 | Counterfeit 10USD Back |
+| 34 | Counterfeit 5USD Back |
+| 35 | Counterfeit 20USD Back |
+| 36 | Counterfeit 20USD Front |
+| 37 | Counterfeit 1USD Back |
+| 38 | Counterfeit 5USD Front |
+| 39 | Counterfeit 50USD Back |
 
 **Breakdown:**
 - **12 Regular USD**: Front/Back for $1, $5, $10, $20, $50, $100