Change colour of UImage from firebase to black and white - firebase

Question

Is it possible to load an image from firebase using a url and then changing it's color to black and white?
If I used an image from assets it works but I'm loading my images from firebase via a url and when I try to apply the code below backgroundProfileImage.image equals nil or an Image is not detected. Im also using SDWebImage load my images if that helps. How can I make this work? I Appreciate the help in advance. Thanks
func ChangeImageColor(){
//Auto Adjustment to Input Image
var inputImage = CIImage(image: self.backgroundProfileImage.image!) //backgroundProfileImage is not
let options:[String : AnyObject] = [CIDetectorImageOrientation:1 as AnyObject]
let filters = inputImage!.autoAdjustmentFilters(options: options)
for filter: CIFilter in filters {
filter.setValue(inputImage, forKey: kCIInputImageKey)
inputImage = filter.outputImage
}
let cgImage = self.context.createCGImage(inputImage!, from: inputImage!.extent)
self.backgroundProfileImage.image = UIImage(cgImage: cgImage!)
//Apply noir Filter
let currentFilter = CIFilter(name: "CIPhotoEffectTonal")
currentFilter!.setValue(CIImage(image: UIImage(cgImage: cgImage!)), forKey: kCIInputImageKey)
let output = currentFilter!.outputImage
// let cgimg = self.context.createCGImage(output!, from: output!.extent)
let processedImage = UIImage(cgImage: cgimg)
self.backgroundProfileImage.image = processedImage
}
})
}
This is how I'm retrieving the image
self.backgroundProfileImage.sd_setImage(with: URL(string: backgroundProfileImageURL), placeholderImage: UIImage(named: "empty-profile-3.png"))
Ok this method works for me
func ChangeImageColor(){
let currentFilter = CIFilter(name: "CIPhotoEffectNoir")
currentFilter!.setValue(CIImage(image: self.backgroundProfileImage.image!), forKey: kCIInputImageKey)
let output = currentFilter!.outputImage
let cgimg = context.createCGImage(output!,from: output!.extent)
let processedImage = UIImage(cgImage: cgimg!)
self.backgroundProfileImage.image = processedImage
}

Answer 1

imgView.sd_setImage(with: URL(string:url), completed: { (image, error, type, url) in
//Do any thing with image here.
self.ChangeImageColor(image)
})
func ChangeImageColor(_ image: UIImage){
//Auto Adjustment to Input Image
var inputImage = CIImage(image: image)
let options:[String : AnyObject] = [CIDetectorImageOrientation:1 as AnyObject]
let filters = inputImage!.autoAdjustmentFilters(options: options)
for filter: CIFilter in filters {
filter.setValue(inputImage, forKey: kCIInputImageKey)
inputImage = filter.outputImage
}
let cgImage = self.context.createCGImage(inputImage!, from: inputImage!.extent)
self.backgroundProfileImage.image = UIImage(cgImage: cgImage!)
//Apply noir Filter
let currentFilter = CIFilter(name: "CIPhotoEffectTonal")
currentFilter!.setValue(CIImage(image: UIImage(cgImage: cgImage!)), forKey: kCIInputImageKey)
let output = currentFilter!.outputImage
// let cgimg = self.context.createCGImage(output!, from: output!.extent)
let processedImage = UIImage(cgImage: cgimg)
self.backgroundProfileImage.image = processedImage
}
})
}
Call the method when you retrieve the image with your library and pass it as parameter.