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ios - 检测矩形时崩溃，Swift，iOS

问题描述

我正在尝试用视觉检测矩形。每隔一段时间，我就会因为这种解释而崩溃。

断言失败：(maxDev != -1.f)，函数 straightLineWLSQ，文件 /BuildRoot/Library/Caches/com.apple.xbs/Sources/Vision/Vision-1.5.3/RectangleDetector/QuadDetect/Leq.c，第 217 行.

这是崩溃的功能。

func performVisionRequest(image: CGImage, orientation: CGImagePropertyOrientation) {


    DispatchQueue.global(qos: .userInitiated).async {
        do {

            let imageRequestHandler = VNImageRequestHandler(cgImage: image, orientation: orientation, options: [:])
            // This is where I get the error.
            try imageRequestHandler.perform(
                [VNDetectRectanglesRequest(completionHandler:{ req, err in
                    self.rectanglesRequest(request:req, error:err)

                })]
            )
        } catch let error as NSError {
            self.sliceCompletion(UIImage())
            print("Failed to perform vision request: \(error)")

        }
    }
}

标签： iosswiftrectangles

解决方案

我的项目也面临同样的问题，并通过跳过一些图像（如 ImageWidth 太高于 ImageHeight 和 ImageHeight 太高于 ImageWidth）来解决。

当我们尝试检测某些图像的矩形时会发生崩溃，例如(ImageWidth:1240,ImageHeight:121 ) 或(ImageWidth:121,ImageHeight:1240)

func performVisionRequest(image: CGImage, orientation: CGImagePropertyOrientation) {


       let ratioW = image.width / image.height
       let ratioH = image.height / image.width

       if(ratio < 7) //To skip crash image
       {
           DispatchQueue.global(qos: .userInitiated).async {

             do {

                   let imageRequestHandler = VNImageRequestHandler(cgImage: image, orientation: orientation, options: [:])
            // This is where I get the error.
                   try imageRequestHandler.perform(
                [VNDetectRectanglesRequest(completionHandler:{ req, err in
                    self.rectanglesRequest(request:req, error:err)

                })]
            )
        } catch let error as NSError {
            self.sliceCompletion(UIImage())
            print("Failed to perform vision request: \(error)")

        }
    }
  }
}

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