matplotlib 中将图直接从buffer中变为PIL 再到numpy

def get_image_many(self, one_name, two_name, thr_name, face_name):self.plt_image_many(one_name, two_name, thr_name, face_name)buffer = io.BytesIO() # 获取输入输出流对象self.canvas.print_png(buffer) # 将画布上的内容打印到输入输出流对象img = Image.open(buffer) # 使用Image打开图片数据img = np.asarray(img)buffer.close()return img