Example for "preprocessedImageForTesseract"

switch-image-threshold-method

func preprocessedImageForTesseract(tesseract: G8Tesseract!, sourceImage: UIImage!) -> UIImage! {
  
  var filteredImage = UIImage()
  
  switch threshold_mode  {
  case ThresholdMode.AdaptiveThreshold :
  
    // Using AdaptiveThreshold
    let adaptiveFilter = GPUImageAdaptiveThresholdFilter()
    adaptiveFilter.blurRadiusInPixels = 4.0
    filteredImage = adaptiveFilter.imageByFilteringImage(sourceImage)
  
    return filteredImage
    
  case ThresholdMode.AvarageLuminessence :
  
    // Using AverageLuminace Filter
    let avarageFilter = GPUImageAverageLuminanceThresholdFilter()
    avarageFilter.thresholdMultiplier =  1.0
    filteredImage = avarageFilter.imageByFilteringImage(sourceImage)
    
    return filteredImage
            
  default:
    // Using default Image-thresholding method
    return nil
    
  }

}