I am stuck with a related issue. I have raw pixel data from a Sony chip in RGGB pixel arrangement. How do I assign/apply raw filter options with CIFilter? The Apple Developer Documentation says you have to provide an identifier hint in the options, but I have no clue how to do this... The only example I found is outdated and the syntax provided causes a type error. Any help or hint is highly appreciated. Thank you! This is what I do, but it does not work... let rfo = [ String(kCGImageSourceTypeIdentifierHint) : "com.sony.raw-image" ] as! [CIRAWFilterOption:Any] let cii = CIFilter(imageData: ddata , options: rfo).outputImage

... I know this is an old thread, but it looks like what I am trying to figure out. Maybe you could help me out ... I have raw pixel data from a binary file and try to convert them into a CIImage. I decided to go via CVPixelBuffer in order to be able to provide the pixel layout (CFA) of my image sensor, which is a Sony RGGB (aka. "rgg4"). The rawImgData are [UInt16] with width*height number of elements, because I had to do some numerical treatment on the data. This is how far I got so far. I am stuck with the pixel-buffer properties. What do I have to put in the dictionary for CIFilter to create a raw image? I always get an error messages at line 10. The compiler does not like the "nil". var pixelBuffer: CVPixelBuffer? let attrs: [ CFString : Any ]  = [ kCVPixelBufferCGImageCompatibilityKey : kCFBooleanTrue as Any, kCVPixelBufferCGBitmapContextCompatibilityKey : kCFBooleanTrue as Any ] CVPixelBufferCreateWithBytes(kCFAllocatorDefault, width, height, kCVPixelFormatType_14Bayer_RGGB, &imgRawData, 2*width, nil, nil, attrs as CFDictionary, &pixelBuffer) let sourceTypeIdentifierHint = CIRAWFilterOption(rawValue: kCGImageSourceTypeIdentifierHint as String) let rfo: [CIRAWFilterOption: Any] = [ sourceTypeIdentifierHint : "com.sony.raw-image" ] let ciiraw = CIFilter(cvPixelBuffer: pixelBuffer, properties: nil, options: rfo).outputImage I put this in this thread, because one could imagine to convert the pixel buffer into data object and then omit the properties in CIFilter. But maybe, I would loose too much info from the pixel buffer. No clue. Thank you for your help!

Hi ... I know it's been a while since this was posted. I actually have the same question. Did you figure it out? And would you mind sharing? Thanks!

Thank you for explaining the syntax. Excellent! Good point about CGImageSourceOption. According to the CIFilter initializer - https://developer.apple.com/documentation/coreimage/cifilter/1437879-init#discussion, it is recommended to provide this option. I will test this later today.

Hi, I am having exactly the same issue. Did you find a solution? I have the raw data from a camera sensor with 14bit/pixel with an RGGB color-filter array (CFA). I tried so many things to convert this to a color image, while letting iOS/Swift take care of the demosaicing. It obviously can do it. No need for me to program the de-bayering myself and probably doing a poor job at it compared to what iOS could do. Here is my code, which only gets me black and white (or better grayscale) images: let dummyImg = UIImage(systemName: "star.fill")?.cgImage // imgRawData is a [UInt16] array var pixelBuffer: CVPixelBuffer? let attrs: [ CFString : Any ]  = [ kCVPixelBufferCGImageCompatibilityKey : kCFBooleanTrue as Any, kCVPixelBufferCGBitmapContextCompatibilityKey : kCFBooleanTrue as Any, kCVPixelBufferPixelFormatTypeKey : "rgg4" ] CVPixelBufferCreateWithBytes(kCFAllocatorDefault, width, height, kCVPixelFormatType_14Bayer_RGGB, &imgRawData, 2*width, nil, nil, attrs as CFDictionary, &pixelBuffer) let ciimg = CIImage(cvImageBuffer: pixelBuffer!) let context: CIContext = CIContext.init(options: [ CIContextOption(rawValue: "workingFormat") : CIFormat.RGBA16 ] ) guard let cgi = context.createCGImage(ciimg, from: ciimg.extent, format: CIFormat.RGBA16, colorSpace: CGColorSpace(name: CGColorSpace.sRGB), deferred: false) else { return dummyImg! } I also tried this more direct approach with VideoTools.... it just returns nil: var cgI: CGImage? VTCreateCGImageFromCVPixelBuffer(pixelBuffer!, options: nil, imageOut: &cgI) How did you solve it?

I have been running different tests with the new CiRawFilter class and it seems to work well for me on macOS 12.3.1 in a Playground in Xcode 13.3.1. I tried the code with both a raw photo from my Canon Camera (CR2 format) and a raw photo from my iPhone 11 (DNG format). I do not have access to ProRaw photos, though. BTW, I noticed that your rawFilter is not optional. Maybe this is the issue? Here my code: import Cocoa import Foundation import CoreImage import SwiftUI // Path to locally stored raw image, not ProRaw, from an iPhone 11 let rawimgpath = "/...path.../IMGAGE.dng" let rawimgurl = URL(fileURLWithPath: rawimgpath) // Initialising the CiRAWFilter with URL let rawfilter = CIRAWFilter(imageURL: rawimgurl) // Creating a CI Image let rawimg = rawfilter?.outputImage // Creating a CG Image let context = CIContext() let rawcgimg = context.createCGImage(rawimg!, from: rawimg!.extent) let rawuiimg = Image(decorative: rawcgimg!, scale: 1.0) // Printing the properties of the filter... this should also show your Gammut Mapping let rawFltProps = rawfilter?.properties // Printing the properties of the image... let rawImgProps = rawimg?.properties // This does not cause an error let isgammutMappingEnabled = rawfilter?.isGamutMappingEnabled // Returns (Optional)true // Note: The Ci rawfilter is always optional with the "?" ! PS: Please, use the "Code Block" feature in the editor for better readability of your code. Makes things a little easier ;-).

BTW, this is a very good tutorial on raw image processing: https://developer.apple.com/wwdc21/10160