title: How To Using Image Adjustment (Brightness, Contrast) in UVCCamera Library on Android Studio
body: <p>I'm trying to build an apps to capture picture from usb camera, using UVCCamera from <a href="https://github.com/saki4510t/UVCCamera" rel="nofollow noreferrer">https://github.com/saki4510t/UVCCamera</a>
  But, i didn't know, how to implement image adjustment setting (like Adjust Brightness, Contrast, White Balance) in this library.
  I've tried to using seekbar to adjust brightness setting, and this is my code :</p>
  
  <pre><code>final UVCCamera camera = new UVCCamera();
  
  private final OnSeekBarChangeListener mSeekBarChangeListener = new OnSeekBarChangeListener()
  {
      @Override
      public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) 
      {
          if (mCameraHandler.isOpened()) //When USB Camera, Connected
          {       
              camera.setBrightness(progress);
          }
      }
      @Override
      public void onStartTrackingTouch(SeekBar seekBar) 
      {
      }
      @Override
      public void onStopTrackingTouch(SeekBar seekBar) 
      {
      }
  };
  </code></pre>
  
  <p>And, if i try to change value of seekbar, the value has changed, but it doesn't change the brightness level.
  Can anybody explain me, how to change the image adjustment in this library or give me correction about my code?
  Any answers will be apreciate from me</p>
  
  <p>Regards, and have a good day everyone :)</p>