ImageColorizer+Colorize.swift

extension ImageColorizer {
    private func colorize(image inputImage: UIImage) -> Result<UIImage, Error> {
        do {
            let inputImageLab = try preProcess(inputImage: inputImage) // ➊
            let input = try colorizerInput(from: inputImageLab) // ➋
            let output = try coremlColorizer(configuration: MLModelConfiguration()).prediction(input: input) // ➌
            let outputImageLab = imageLab(from: output, inputImageLab: inputImageLab) // ➍
            let resultImage = try postProcess(outputLAB: outputImageLab, inputImage: inputImage) // ➎
            return .success(resultImage)
        } catch {
            return .failure(error)
        }
    }
}