Apple Vision文字识别Bounding Box Y轴偏移问题求助

我已通过Apple官方文档成功实现静态图片的文字识别，随后参照同一文档添加Bounding Box功能，使用的识别代码如下：

func recongizeText()
{
    // 创建新的图片请求处理器
    let cgImage = self.nsImage!.cgImage(forProposedRect: nil, context: nil, hints: nil)

    let requestHandler = VNImageRequestHandler(cgImage: cgImage!)


    // 创建识别文字的新请求
    let request = VNRecognizeTextRequest(completionHandler: recognizeTextHandler)
    do {
        // 执行文字识别请求
        try requestHandler.perform([request])
    } catch {
        print("无法执行请求: \(error).")
    }

}
func recognizeTextHandler(request: VNRequest, error: Error?) {
    guard let observations =
            request.results as? [VNRecognizedTextObservation] else {
        return
    }
    let recognizedStrings = observations.compactMap { observation in
        // 返回排名第一的VNRecognizedText实例的字符串
        return observation.topCandidates(1).first?.string
    }
    let boundingRects: [CGRect] = observations.compactMap { observation in


        // 获取排名第一的识别结果
        guard let candidate = observation.topCandidates(1).first else { return .zero }
        
        // 获取对应字符串范围的边界框观测值
        let stringRange = candidate.string.startIndex..<candidate.string.endIndex
        let boxObservation = try? candidate.boundingBox(for: stringRange)
        // 获取归一化的CGRect值
        let boundingBox = boxObservation?.boundingBox ?? .zero

   // 将矩形从归一化坐标转换为图片坐标
        return VNImageRectForNormalizedRect(boundingBox,
                                            Int(self.nsImage!.size.width),
                                            Int(self.nsImage!.size.height))
    }
    self.boundingRects = boundingRects
}

UI部分添加了简单的覆盖层代码：

struct BoundingBoxView: View {
var nsImage: NSImage // 要显示的NSImage
    var normalizedBoundingBoxes: [CGRect] // 归一化边界框数组
    
    var body: some View {
        Image(nsImage: nsImage)
            .resizable()
            .aspectRatio(contentMode: .fit)
            .overlay(
                GeometryReader { geometry in
                    // 绘制归一化边界框
                    ForEach(normalizedBoundingBoxes.indices, id: \.self) { index in
                        let normalizedBox = normalizedBoundingBoxes[index]
                        Rectangle()
                            .stroke(Color.red, lineWidth: 2)
                            .frame(width: normalizedBox.size.width, height: normalizedBox.size.height)
                            .position(x: normalizedBox.midX, y: normalizedBox.midY)
                    }
                }
            )
    }
}

运行后出现Bounding Box Y轴偏移的情况，偏移效果如图：

内容的提问来源于stack exchange，提问作者flex_