Show Light Field Image on the HTC Vive

I'm new to use Unity, and this is my first time asking the question.
Now I need to use both the color image and the depth image of the scene(so I use two cameras) to calculate the light field image which I use the DLL of the light field algorithm to do that.
The problem is I don't know how to let the light field image just show on the HTC Vive.
Here is my code.

Code (CSharp):

1.  unsafe void OnRenderImage(RenderTexture source, RenderTexture destination)
2.     {
3.         //RenderTexture Final;
4.         Graphics.Blit(source, destination, mat);
5.    
6.         RenderTexture.active = source;
7.  
8.         //---------------------------------------vary---------------------------------------
9.         colorImageTexture.ReadPixels(new Rect(0, 0, source.width, source.height), 0, 0, true);
10.         colorImageTexture.Apply();
11.         pix = colorImageTexture.GetPixels32();
12.         //------------------------------------vary Done-------------------------------------
13.  
14.         RenderTexture currentRT = RenderTexture.active; // save current active rendertexture
15.  
16.         RenderTexture.active = destination;             //depth
17.  
18.         //---------------------------------------vary---------------------------------------
19.         depthImageTexture.ReadPixels(new Rect(0, 0, destination.width, destination.height), 0, 0);
20.         depthImageTexture.Apply();
21.         depth = depthImageTexture.GetPixels32();
22.  
23.    
24.         Output = colorImageTexture.GetPixels32();
25.         GCHandle pinnedArray = GCHandle.Alloc(Output, GCHandleType.Pinned);
26.    
27.      //DLL of the light field algorithm
28.        LF_DLL(pinnedArray.AddrOfPinnedObject(), pix , depth ,4.1f * 0.95f, height, width);                       //LF_DLLpixels, Output
29.         LFImageTexture.SetPixels32(Output);
30.         LFImageTexture.Apply();
31.         SavePNG(LFImageTexture, "./depthImages/color_GC_LF" + image_id + ".png");
32.         pinnedArray.Free();
33.  
34.         Graphics.Blit(source, targetTexture);//I don't know how to show the light field image on the scene
35.  
36.         /
37.     }

Do I use the correct function?
Or anyone know other methods to achieve that?