rqt显示不出来图像

因为发布要求的是8位

发布出来的是float64位，需要改变格式

def callback(self,data):
				print('callback')
				img = np.frombuffer(data.data, dtype=np.uint8).reshape(data.height, data.width, -1)
				img = img[:,:,::-1]
				self.img = img
				print(img.shape)
				m = self.deHaze(img/255)*255
				#print(dtype)  # 处理完要float64 还有负值
				m = np.clip(m,a_min=0,a_max=255) #先归一化到0-255消除负数
				print(m)
				m = m.astype(np.int8)  #在转化为8位数
				print(m.dtype) 
				self.publish_image(self.pub1,m,'base_link')
				print('finish remove fog')
        
		def publish_image(self,pub, data, frame_id='base_link'):
				assert len(data.shape) == 3, 'len(data.shape) must be equal to 3.'
				print(data.shape)
				header = Header(stamp=rospy.Time.now())
				header.frame_id = frame_id
			
				msg = Image()
				msg.height = data.shape[0]
				msg.width = data.shape[1]
				msg.encoding = 'rgb8'  #传入数据要求是8位
				msg.data = np.array(data).tostring()
				msg.header = header
				msg.step = msg.width *1*3
				print("**************************")
	
				pub.publish(msg)
				print("---------------------------")