I'm generating an image with barcode using its string like below.
class BarCode {
class func fromString(string : String) -> UIImage? {
let data = string.dataUsingEncoding(NSASCIIStringEncoding)
let filter = CIFilter(name: "CICode128BarcodeGenerator")
filter!.setValue(data, forKey: "inputMessage")
return UIImage(CIImage: filter!.outputImage!)
}
}
so this generates a accurate image. but the quality is low. how can I increase the quality of the image.(I cant increase the size of the image, if I do so it looks liked blured)
When the CIImage is converted to a UIImage it does so with a fixed size that is determined by the CIImage, if you subsequently try to scale this image up, say by assigning it to a UIImageView, then you will get the typical pixellation associated with scaling up a bitmap.
Transform the image before assigning it to the UIImage
if let barImage = filter.outputImage {
let transform = CGAffineTransformMakeScale(5.0, 5.0)
let scaled = barImage.imageByApplyingTransform(transform)
return(UIImage(CIImage: scaled))
}