Example snippet of how to run a CoreML ImageRequest on an ARKit scene's current frame

snippet.swift

func runCoreML() {
    // Get Camera Image as RGB
    guard let sceneView = self.sceneView else { return }
    guard let currentFrame = sceneView.session.currentFrame else { return }
    let pixbuff : CVPixelBuffer = currentFrame.capturedImage
    let ciImage = CIImage(cvPixelBuffer: pixbuff)

    // Prepare CoreML/Vision Request
    let imageRequestHandler = VNImageRequestHandler(ciImage: ciImage, options: [:])

    // Run Image Request
    do {
        try imageRequestHandler.perform(self.visionRequests)
    } catch {
        print(error)
    }

}