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The Image message subscribed in ROS is displayed as red question marks in Unity

Discussion in 'Robotics' started by ThrPanEE, Jan 13, 2023.

  1. ThrPanEE


    May 30, 2022
    In fact, I subscribed to the topic type of /sensor_msgs/Image in ROS and displayed on the Texture in Unity, but the result is displayed as a red question mark. I have tried to load image data with different APIs, but that has no effect. I want to know what I should do?
    Here is my code:

    Code (CSharp):
    1. using System.Collections;
    2. using System.Collections.Generic;
    3. using UnityEngine;
    4. using Unity.Robotics.ROSTCPConnector;
    5. using RosMessageTypes.Sensor;
    7. public class MainCameraTopicSubscriber : MonoBehaviour
    8. {
    9.     public MeshRenderer meshRenderer;
    10.     private Texture2D texture2D;
    11.     private byte[] image_Data;
    13.     // Start is called before the first frame update
    14.     void Start()
    15.     {
    16.         texture2D = new Texture2D(2, 2);
    18.         meshRenderer.material = new Material(Shader.Find("Standard"));
    19.         ROSConnection.GetOrCreateInstance().Subscribe<ImageMsg>("/dji_osdk_ros/main_camera_images", ImageInput);
    20.     }
    22.     void ImageInput(ImageMsg imageMsg)
    23.     {
    24.         image_Data =;
    25.         texture2D.LoadImage(image_Data);
    26.         meshRenderer.material.SetTexture("_MainTex", texture2D);
    27.     }
    If anyone has a good solution, please tell me in time, thank you!!