visualization.py 文件源码

def _draw_single_box(image, xmin, ymin, xmax, ymax, display_str, font, color='black', thickness=4):
  draw = ImageDraw.Draw(image)
  (left, right, top, bottom) = (xmin, xmax, ymin, ymax)
  draw.line([(left, top), (left, bottom), (right, bottom),
             (right, top), (left, top)], width=thickness, fill=color)
  text_bottom = bottom
  # Reverse list and print from bottom to top.
  text_width, text_height = font.getsize(display_str)
  margin = np.ceil(0.05 * text_height)
  draw.rectangle(
      [(left, text_bottom - text_height - 2 * margin), (left + text_width,
                                                        text_bottom)],
      fill=color)
  draw.text(
      (left + margin, text_bottom - text_height - margin),
      display_str,
      fill='black',
      font=font)

  return image