Update app.py

app.py

@@ -131,18 +131,23 @@ class DicomAnalyzer:
             # Get image dimensions
             height, width = raw_image.shape[:2]
 
-            # Calculate coordinates
+            # Get clicked coordinates
             clicked_x = evt.index[0]
             clicked_y = evt.index[1]
 
-            # Adjust coordinates for ImageJ compatibility
-            x = int(clicked_x)
-            y = int(clicked_y)
-
+            # ImageJ coordinate system conversion
             if self.zoom_factor != 1.0:
-                # Adjust for zoom and pan
+                # Convert from display coordinates to image coordinates
                 x = int((clicked_x + self.pan_x) / self.zoom_factor)
                 y = int((clicked_y + self.pan_y) / self.zoom_factor)
+            else:
+                # Direct mapping for no zoom
+                x = int(clicked_x)
+                y = int(clicked_y)
+
+            # Offset correction for ImageJ compatibility
+            x = x + 4  # Adjust these offset values based on testing
+            y = y + 4  # Adjust these offset values based on testing
 
             # Ensure coordinates are within bounds
             x = max(0, min(x, width-1))
@@ -157,15 +162,15 @@ class DicomAnalyzer:
             )
             mask[distance_from_center <= radius] = 1
 
-            # Get ROI pixels from raw image
+            # Get ROI pixels directly from raw image
             roi_pixels = raw_image[mask == 1]
 
-            # Calculate statistics using raw values
+            # Calculate statistics from raw values
             pixel_spacing = float(self.dicom_data.PixelSpacing[0])
             area_pixels = np.sum(mask)
             area_mm2 = area_pixels * (pixel_spacing ** 2)
             
-            # Use raw pixel values for statistics
+            # Calculate statistics
             mean = np.mean(roi_pixels)
             stddev = np.std(roi_pixels)
             min_val = np.min(roi_pixels)
@@ -185,8 +190,8 @@ class DicomAnalyzer:
             self.marks.append((x, y, self.circle_diameter))
             
             # Debug information
-            print(f"Clicked at: ({clicked_x}, {clicked_y})")
-            print(f"Adjusted to: ({x}, {y})")
+            print(f"Original click: ({clicked_x}, {clicked_y})")
+            print(f"Adjusted coordinates: ({x}, {y})")
             print(f"Zoom factor: {self.zoom_factor}")
             print(f"Pan: ({self.pan_x}, {self.pan_y})")
             print(f"ROI Statistics: Mean={mean:.3f}, StdDev={stddev:.3f}")