Zee Janjua Zee Janjua - 1 month ago 12
Swift Question

iOS: When applying a CIFilter to a UIImage the result image is rotated

When i apply CIFilter to a image that is captured from Back camera the result is perfect but When i apply CIFilter to a image that is captured from Front camera the result is not good because image rotated whats wrong there??

My filter function is given below

func ApplyFilter()->UIImage
let ciContext = CIContext(options: nil)
let coreImage = CIImage(image: myImage!)
let filter = CIFilter(name: "CIPhotoEffectNoir" )
filter!.setValue(coreImage, forKey: kCIInputImageKey)
let filteredImageData = filter!.valueForKey(kCIOutputImageKey) as! CIImage
let filteredImageRef = ciContext.createCGImage(filteredImageData, fromRect: filteredImageData.extent)
var newImage = UIImage(CGImage: filteredImageRef);

return newImage


Answer Source

Make sure the image size before apply filters means width should be less than height because image/photos taken from front camera have grater width than length that may cause problem after applying filters. https://developer.apple.com/library/content/documentation/DeviceInformation/Reference/iOSDeviceCompatibility/Cameras/Cameras.html