Hidden Error in Dynamic Light based on Background plane

Code (CSharp):

1.  
2. using UnityEngine;
3. using UnityEngine.UI;
4.  
5. public class REAL_LIGHTING : MonoBehaviour {
6.     public Material matObj, my_mat;
7.     public GameObject m_Main;
8.     public Light Main_light, Second_light;
9. //Debug Images
10.     public Image m_image1, m_image2;
11.     public Text m_t;
12.     public Texture2D my_texture2d;
13.  
14.     void Update () {
15.         if (matObj == null)
16.         {
17.             DontDestroyOnLoadObjects();
18.             my_mat = this.GetComponent<Renderer>().material;
19.             my_texture2d = my_mat.mainTexture as Texture2D;
20.             m_image2.material = my_mat;
21.         }
22.         transform.LookAt(Camera.main.transform);
23.         Main_light.color = AverageColorFromTexture(my_texture2d);
24.     }
25.     private void LateUpdate()
26.     {
27.    
28.         Second_light.color = Main_light.color;
29.         m_image1.color = Main_light.color;
30.    
31.     }
32.  
33.     public void DontDestroyOnLoadObjects()
34.     {
35.         matObj = m_Main.transform.GetChild(0).GetComponent<Renderer>().material;
36.  
37.         this.GetComponent<Renderer>().material = matObj;
38.  
39.     }
40.  
41.     Color32 AverageColorFromTexture(Texture2D tex)
42.     {
43.  
44.         Color32[] texColors = tex.GetPixels32();
45.  
46.         //int total = texColors.Length;
47.         int total = 300000;
48.         float r = 0;
49.         float g = 0;
50.         float b = 0;
51.  
52.         for (int i = 0; i < total/1000; i++)
53.         {
54.  
55.             r += texColors[(i * 1000)% total].r;
56.  
57.             g += texColors[(i * 1000) % total].g;
58.  
59.             b += texColors[(i * 1000) % total].b;
60.  
61.         }
62.         //m_t.text = r/1000;
63.         m_t.text = " "+(byte)((r / (total / 1000)) + 10)+ " ! " + (byte)((g / (total / 1000)) + 10) + " ! " + (byte)((b / (total / 1000)) + 10) + " ! " + 255;
64.         return new Color32((byte)((r / (total / 1000)) +10), (byte)((g / (total / 1000)) + 10), (byte)((b / (total / 1000)) + 10), 255);
65.  
66.     }
67. }

Changes color of Light based on vuforia Background plane material texture (video camera output).

Works great on PC dos not work on Android for some reason.
My best gess is " .mainTexture as Texture2D;" not working
or .GetPixels32();
If anyone knows why pls help.