ciimage

I am trying to make a gradient and use it as an alpha mask. Right now, I am able to make an image similar to this (from black to transparent): This is the code which I use to make all this: private func createImage(width: CGFloat, height: CGFloat) -> CGImageRef?{ if let ciFilter = CIFilter(name: "CILinearGradient"){ let ciContext = CIContext() ciFilter.setDefaults() let startColor = CIColor(red: 0, green: 0, blue: 0, alpha: 0) let endColor = CIColor(red: 0, green: 0, blue: 0, alpha: 1) let startVector = CIVector(x: 0, y: height-10) let endVector = CIVector(x: 0, y: height-22) ciFilter.setValue

EDIT found this code that helped with front camera images http://blog.logichigh.com/2008/06/05/uiimage-fix/ Hope others have had a similar issue and can help me out. Haven't found a solution yet. (It may seem a bit long but just a bunch of helper code) I'm using the ios face detector on images aquired from the camera (front and back) as well as images from the gallery (I'm using the UIImagePicker - for both image capture by camera and image selection from the gallery - not using avfoundation for taking pictures like in the squarecam demo) I am getting really messed up coordinates for the

Updated to Xcode 7 and getting this (warning?) message while an image was being rendered in an operation: CreateWrappedSurface() failed for a dataprovider-backed CGImageRef. There was no message like this under Xcode 6.4. Got which code part threw the message: if (!self.originalImage) // @property (nonatomic, strong) UIImage *originalImage; return; CGImageRef originalCGImage = self.originalImage.CGImage; NSAssert(originalCGImage, @"Cannot get CGImage from original image"); CIImage *inputCoreImage = [CIImage imageWithCGImage:originalCGImage]; // this results the console message I replaced my

I'm just starting out in Objective-C and I'm trying to create a simple app where it shows the camera view with a blur effect on it. I got the Camera output working with the AVFoundation framework. Now, I'm trying to hook up the Core image framework but to no knowledge how to, Apple documentation is confusing for me and searching for guides and tutorials online leads to no results. Thanks in advance for the help. #import "ViewController.h" #import <AVFoundation/AVFoundation.h> @interface ViewController () @property (strong ,nonatomic) CIContext *context; @end @implementation ViewController

I need to apply a black-and-white filter on a UIImage. I have a view in which there's a photo taken by the user, but I don't have any ideas on transforming the colors of the image. - (void)viewDidLoad { [super viewDidLoad]; self.navigationItem.title = NSLocalizedString(@"#Paint!", nil); imageView.image = image; } How can I do that? Objective C - (UIImage *)convertImageToGrayScale:(UIImage *)image { // Create image rectangle with current image width/height CGRect imageRect = CGRectMake(0, 0, image.size.width, image.size.height); // Grayscale color space CGColorSpaceRef colorSpace =