update readme

README.md

@@ -1,24 +1,40 @@
 # PanelDetector
 Panel detection node for CoRE-1 2024
 
+## Node Structure
+
+### Topic (Subscribe)
+
+| Topic Name | Type | Description |
+| --- | --- | --- |
+| image_raw | sensor_msgs/msg/Image | Raw image from camera |
+
+### Topic (Publish)
+
+| Topic Name | Type | Description |
+| --- | --- | --- |
+| positions | geometry_msgs/msg/Detection2DArray | Detected panel poses |
+
+### Class Diagram
+
 ```mermaid
 ---
 title: Panel Detector Plugin hierarchy
 ---
 classDiagram
-    PanelDetectorNode <-- DetectorA : load as dll
-    PanelDetectorNode <-- DetectorB : load as dll
-    DetectorA <|-- DetectorBase : include
-    DetectorB <|-- DetectorBase : include
+    PanelDetectorNode <-- DetectorPluginA : load as dll
+    PanelDetectorNode <-- DetectorPluginB : load as dll
+    DetectorPluginA <|-- DetectorBase : include
+    DetectorPluginB <|-- DetectorBase : include
     PanelDetectorNode <|-- DetectorBase : include
     PanelDetectorNode: params
     PanelDetectorNode: image_callback(Image)
-    class DetectorA{
+    class DetectorPluginA{
         filter_kernel_param_a
         init(params)
         processing(cv::Mat)
     }
-    class DetectorB{
+    class DetectorPluginB{
         filter_kernel_param_b
         init(params)
         processing(cv::Mat)