Update image_utils.py

app/image_utils.py

@@ -6,50 +6,56 @@ from pathlib import Path
 
 def add_watermark(image_array: np.ndarray, text: str, confidence: float) -> Image.Image:
     """
-    Adds a large, prominent, and consistently sized text overlay to an image.
+    Adds a large, prominent, and professional-looking text banner to the top of an image.
     """
     image = Image.fromarray(image_array).convert("RGBA")
+    
+    # Create a transparent overlay layer
     txt_overlay = Image.new("RGBA", image.size, (255, 255, 255, 0))
     draw = ImageDraw.Draw(txt_overlay)
 
+    # --- DEFINE BANNER AND TEXT PROPERTIES ---
     is_pneumonia = (text == "PNEUMONIA")
-    box_color = (220, 53, 69, 210) if is_pneumonia else (25, 135, 84, 210)
-    text_color = (255, 255, 255, 255)
-    shadow_color = (0, 0, 0, 180)
-    
-    # --- FONT FIX: Use a bundled font file for reliability ---
-    font_path = Path(__file__).parent / "Roboto-Bold.ttf"
+    banner_color = (220, 53, 69, 210) if is_pneumonia else (25, 135, 84, 210) # Red/Green
+    text_color = (255, 255, 255)
     
-    # --- SIZING FIX: Make the box a fixed proportion of the image width ---
-    box_width = int(image.width * 0.4) # Box will be 40% of the image width
-    box_height = int(box_width * 0.4)  # Maintain an aspect ratio for the box
+    # --- SIZING FIX: Banner height is 1/8th of the image height ---
+    banner_height = int(image.height / 8)
     
-    # Start with a large font size and shrink it until the text fits in the box
-    font_size = int(box_height / 2.5)
-    font = ImageFont.truetype(str(font_path), font_size)
-    
-    text_to_draw = f"{text}\n{confidence:.1%}"
-    
-    # Adjust font size until text fits within the box width
-    while font.getbbox(text_to_draw, align="center")[2] > box_width * 0.9:
-        font_size -= 2
+    # --- FONT FIX: Use a bundled font and scale it to fit the banner ---
+    font_path = Path(__file__).parent / "Roboto-Bold.ttf"
+    try:
+        # Start with a font size that's a good proportion of the banner height
+        font_size = int(banner_height * 0.6)
         font = ImageFont.truetype(str(font_path), font_size)
+    except IOError:
+        print(f"Font at '{font_path}' not found, using default.")
+        font = ImageFont.load_default()
 
-    # --- POSITIONING: Place box in the top-left corner ---
-    box_position = [10, 10, 10 + box_width, 10 + box_height]
-    draw.rectangle(box_position, fill=box_color)
-
-    # Center the text within the box
-    text_bbox = draw.textbbox((0, 0), text_to_draw, font=font, align="center")
-    text_width = text_bbox[2] - text_bbox[0]
-    text_height = text_bbox[3] - text_bbox[1]
-    
-    text_x = box_position[0] + (box_width - text_width) / 2
-    text_y = box_position[1] + (box_height - text_height) / 2
-    
-    # Draw text with shadow
-    draw.text((text_x + 2, text_y + 2), text_to_draw, font=font, fill=shadow_color, align="center")
-    draw.text((text_x, text_y), text_to_draw, font=font, fill=text_color, align="center")
+    # Text to draw
+    text_to_draw = f"{text} | Confidence: {confidence:.1%}"
     
+    # --- DRAW THE BANNER ---
+    draw.rectangle([0, 0, image.width, banner_height], fill=banner_color)
+
+    # --- POSITIONING: Center the text within the banner ---
+    try:
+        # getbbox is the modern, accurate way to measure text
+        _, top, _, bottom = draw.textbbox((0, 0), text_to_draw, font=font)
+        text_w = font.getlength(text_to_draw)
+        text_h = bottom - top
+    except Exception:
+        # Fallback for older Pillow
+        text_w = font.getsize(text_to_draw)[0]
+        text_h = font.getsize(text_to_draw)[1]
+        
+    text_x = (image.width - text_w) / 2
+    text_y = (banner_height - text_h) / 2
+    
+    # Draw text
+    draw.text((text_x, text_y), text_to_draw, font=font, fill=text_color)
+    
+    # Composite the overlay onto the original image
     watermarked_image = Image.alpha_composite(image, txt_overlay)
+    
     return watermarked_image.convert("RGB")