Check out example codes for "texture to image unity". It will help you in understanding the concepts better.
Code Example 1
Image pictureInScene; byte temp= File.ReadAllBytes ("pathTo/image.png"); Texture2D tempPic= new Texture2D (2, 2); fotillo.LoadImage (temp); pictureInScene.sprite = Sprite.Create (tempPic, new Rect (0, 0, 128, 128), new Vector2 ());//set the Rect with position and dimensions as you need
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