title: GPUImageDivideBlendFilter in GPUImage, what's corresponding filter for CIImage?
body: <p>I have try this:</p>
  
  <pre><code>CIFilter *dodgeFilter = [CIFilter filterWithName:@"CIColorDodgeBlendMode"];
  </code></pre>
  
  <p>to replace:</p>
  
  <pre><code>GPUImageDivideBlendFilter *divideBlendFilter = [[GPUImageDivideBlendFilter alloc] init];
  </code></pre>
  
  <p>but the effects are not same.</p>