Python matplotlib RendererAgg.stop_filter用法及代碼示例

本文簡要介紹 python 語言中matplotlib.backends.backend_agg.RendererAgg.stop_filter的用法。

用法

stop_filter(post_processing)

將當前畫布保存為圖像並應用後期處理。

post_processing 函數：

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

保存的渲染器將恢複，並在其上繪製從post_processing返回的圖像(使用draw_image)。