reasonable font size and box line width

app.py

@@ -105,13 +105,13 @@ def draw_mask(mask, draw, random_color=False):
 def draw_box(box, draw, label):
     # random color
     color = tuple(np.random.randint(0, 255, size=3).tolist())
-    line_width = min(5, max(25, 0.006*max(draw.im.size)))
+    line_width = max(4, min(20, 0.006*max(draw.im.size)))
     draw.rectangle(((box[0], box[1]), (box[2], box[3])), outline=color,  width=line_width)
 
     if label:
         font_path = os.path.join(
             cv2.__path__[0], 'qt', 'fonts', 'DejaVuSans.ttf')
-        font_size = min(15, max(75, 0.02*max(draw.im.size)))
+        font_size = max(12, min(60, 0.02*max(draw.im.size)))
         font = ImageFont.truetype(font_path, size=font_size)
         if hasattr(font, "getbbox"):
             bbox = draw.textbbox((box[0], box[1]), str(label), font)