And to clarify on my note, yes all the images are visualised this way. My note was just to point out that the first image was not the same image as displayed in the bottom but two randomly selected images from the before and after stage. Here is an example of the same image before and after the process:
Before:
                    
            
           1


After:
                    
            
          


As you can see the pattern does match for both images, however the precise colour is lost due to the thresholding effect.