As long as the original NEF file is preserved, the "digital negative" remains untouched processing a NEF file does not alter the original instruction set. After processing, the NEF file can be saved as a TIFF, JPEG or again as a NEF with the addition of any applied Capture NX2 processing saved inside the file as a second or alternate instruction set. Another benefit of the NEF file is that depending on the camera, it retains 12-bit or 14-bit data, resulting in an image with a far greater tonal range than an eight-bit JPEG or TIFF file.Īfter-capture processing of the NEF file by Nikon's Capture NX2 software, or other imaging programs, offers greater control over the final image than the processing of a JPEG or a TIFF. You can change the instruction set as many times as you like without ever disturbing the original image's RAW data. The primary benefit of writing images to the memory card in NEF format rather than TIFF or JPEG is that no in-camera processing for white balance, hue, tone and sharpening are applied to the NEF file rather, those values are retained as instruction sets included in the file. The NEF file is written to the memory card in either an uncompressed or "lossless" compressed form. RAW image files, sometimes referred to as digital negatives, contain all the image information captured by the camera's sensor, along with the image's metadata (the camera's identification and its settings, the lens used and other information). If let results = request?.Exclusive to Nikon cameras, the NEF is Nikon's RAW file format. Let imageRect = termineScale(cgImage: cgImage, imageViewFrame: ame) Override func viewDidAppear(_ animated: Bool) Var imageOrientation = CGImagePropertyOrientation(.up) Let bgImage = (to: frame.extent)Ĭlass ViewController: UIViewController weak var imageView: UIImageView! To create clear background CIImage just do this: Render the contents of the CAShapeLayer to CGImageīitmapInfo: )! Set background and fill color and set the path ame = frame.extent // Assuming frame is the input CIImage with the face Create CAShapeLayer matching the dimensions of the input frame Create the closed contour path from points One way to do that is to create a CGImage from CAShapeLayer containing the mask and then create CIImage out of it. So the mask image has to be a CIImage as well. And now you can use the CIKMeans filter with it as described at the beginning.īTW, if you want to play with every single of the 230 filters out there check this app out: UPDATE:ĬIFilters can only work with CIImages. The output of that filter will give you the image with all pixels outside the contour fully transparent.
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