minro changes

utils.py

@@ -168,7 +168,7 @@ def plot_image(image, boxes):
 
     buffer = BytesIO()
     plt.axis('off')
-    plt.savefig(buffer,format='png')
+    plt.savefig(buffer,format='png', bbox_inches='tight', pad_inches=0)
     visualization = Image.open(buffer)
 
     return visualization