Python matplotlib RendererAgg.stop_filter用法及代码示例

本文简要介绍 python 语言中matplotlib.backends.backend_agg.RendererAgg.stop_filter的用法。

用法

stop_filter(post_processing)

将当前画布保存为图像并应用后期处理。

post_processing 函数：

def post_processing(image, dpi):
  # ny, nx, depth = image.shape
  # image (numpy array) has RGBA channels and has a depth of 4.
  ...
  # create a new_image (numpy array of 4 channels, size can be
  # different). The resulting image may have offsets from
  # lower-left corner of the original image
  return new_image, offset_x, offset_y

保存的渲染器将恢复，并在其上绘制从post_processing返回的图像(使用draw_image)。