无需旋转即可自动增强UIImageView

Question

我已经在这里待了两天了，希望您能帮助我。我正在尝试从UIImageView自动增强图像。以下代码有时会旋转并调整图像的大小，我很难确定何时或为什么。由于缺少有关该主题的文章，我觉得我必须缺少一些超级简单的东西。谢谢大家！

// my UIImageView is self.imgOut 

var enhanceImg = CIImage(image: self.imgOut.image!)

let filters = enhanceImg!.autoAdjustmentFilters(options: nil)

for filter: CIFilter in filters {
  filter.setValue(enhanceImg, forKey: kCIInputImageKey)
  enhanceImg = filter.outputImage!
}

let enhancedImg = UIImage(ciImage: enhanceImg!, scale: self.imgOut.image!.scale, orientation: self.imgOut.image!.imageOrientation)
self.imgOut.image = enhancedImg

Answer 1

您可以看到in docs，autoAdjustmentFilters获得了输入options: [CIImageAutoAdjustmentOption : Any]? = nil

所以您需要指定选项（level选项除外）level用于定向crop用于缩放

let filters = enhanceImg!.autoAdjustmentFilters(options: [.level: false, .crop: false])