Question

我想将图像转换为模型图像尺寸。我正在使用API获取图像。这是代码。

let model = GoogLeNetPlaces()
var selectImage: BaseModel!

override func viewDidLoad() {
    super.viewDidLoad()


    let url = URL(string: selectImage.fullURL)
    let imageData = NSData(contentsOf: url!)

    detailImageView.image = UIImage(data: imageData! as Data)

    if let imageToAnalyze = detailImageView.image {

        if let data = sceneLabel(forImage: imageToAnalyze) {
         imageLabel.text = data

        }
    }
}

func sceneLabel(forImage image:UIImage) -> String? {

    if let pixel = ImageProcessor.pixelBuffer(forImage: image.cgImage!){

        guard let scene = try? model.prediction(sceneImage: pixel) else { fatalError("error")}
        return scene.sceneLabel
    }
    return nil
}

这是我用于图像尺寸转换的代码。

struct ImageProcessor {

static func pixelBuffer (forImage image:CGImage) -> CVPixelBuffer? {


    let frameSize = CGSize(width: image.width, height: image.height)

    var pixelBuffer:CVPixelBuffer? = nil
    let status = CVPixelBufferCreate(kCFAllocatorDefault, Int(frameSize.width), Int(frameSize.height), kCVPixelFormatType_32BGRA , nil, &pixelBuffer)

    if status != kCVReturnSuccess {
        return nil

    }

    CVPixelBufferLockBaseAddress(pixelBuffer!, CVPixelBufferLockFlags.init(rawValue: 0))
    let data = CVPixelBufferGetBaseAddress(pixelBuffer!)
    let rgbColorSpace = CGColorSpaceCreateDeviceRGB()
    let bitmapInfo = CGBitmapInfo(rawValue: CGBitmapInfo.byteOrder32Little.rawValue | CGImageAlphaInfo.premultipliedFirst.rawValue)
    let context = CGContext(data: data, width: Int(frameSize.width), height: Int(frameSize.height), bitsPerComponent: 8, bytesPerRow: CVPixelBufferGetBytesPerRow(pixelBuffer!), space: rgbColorSpace, bitmapInfo: bitmapInfo.rawValue)


    context?.draw(image, in: CGRect(x: 0, y: 0, width: image.width, height: image.height))

    CVPixelBufferUnlockBaseAddress(pixelBuffer!, CVPixelBufferLockFlags(rawValue: 0))

    return pixelBuffer

    }
}

我的尺寸有误。

图像尺寸未转换为模型图像尺寸。

有人可以帮我吗？

这是我遇到的错误

[coreml]错误Domain = com.apple.CoreML代码= 1“输入图像特征sceneImage与模型描述不匹配” UserInfo = {NSLocalizedDescription =输入图像特征sceneImage与模型描述不匹配，NSUnderlyingError = 0x6000006a1d40 {Error Domain = com.apple.CoreML代码= 0“图像尺寸3829 x 2411不在允许的图像尺寸组中” UserInfo = {NSLocalizedDescription =图像尺寸3829 x 2411在未允许的图像尺寸组中}}}

如何在Coreml Swift 4中将图像转换为cvPixelImage

0 个答案: