如何从VNClassificationObservation中获取对象直角/坐标

import Vision

// 1. 创建一个VNImageRequestHandler对象来处理图像请求
let image = UIImage(named: "your_image.jpg")!
let requestHandler = VNImageRequestHandler(cgImage: image.cgImage!, options: [:])

// 2. 创建一个VNCoreMLModel对象
guard let model = try? VNCoreMLModel(for: YourModel().model) else {
    fatalError("Failed to load Core ML model")
}

// 3. 创建一个VNCoreMLRequest对象
let request = VNCoreMLRequest(model: model) { (request, error) in
    guard let results = request.results as? [VNClassificationObservation] else {
        fatalError("Failed to process image")
    }
    
    // 6. 遍历VNClassificationObservation数组，获取对象的直角坐标
    for result in results {
        let boundingBox = result.boundingBox
        let topLeft = CGPoint(x: boundingBox.minX, y: boundingBox.minY)
        let bottomRight = CGPoint(x: boundingBox.maxX, y: boundingBox.maxY)
        
        // 在这里可以使用直角坐标进行进一步的处理
        // ...
    }
}

// 4. 使用VNImageRequestHandler的perform方法进行图像分类请求
try? requestHandler.perform([request])