自动对焦和自动曝光在自定义相机图层上的AVFoundation [英] Auto Focus and Auto Exposure in AVFoundation on Custom Camera Layer

问题描述

为 AVFoundation 自定义图层相机创建准确自动聚焦和曝光的最佳方法是什么？例如，当前我的相机预览图层是正方形，像相机焦点和曝光以指定到该帧限制。

当前自动对焦和曝光：

strong>但是正如你可以看到，这将评估整个视图时，聚焦。

  override func touchesBegan（touches：Set< UITouch> withEvent event：UIEvent？）{
 // Get Touch Point 
 let Point = touches.first！.locationInView（self.capture）
 //分配自动聚焦和自动曝光
如果let device = currentCameraInput {
 do {
尝试！ device.lockForConfiguration（）
 if device.focusPointOfInterestSupported {
 //添加焦点
 device.focusPointOfInterest = Point 
 device.focusMode = AVCaptureFocusMode.AutoFocus 
} 
 
如果device.exposurePointOfInterestSupported {
 //在点上添加曝光
 device.exposurePointOfInterest = Point 
 device.exposureMode = AVCaptureExposureMode.AutoExpose 
} 
 device.unlockForConfiguration（）
} 
} 
} 
  

相机图层：1：1比例中的任何内容都应被视为焦点和曝光点，任何超出此范围的内容都不会被视为相机焦点的触摸事件。

解决方案

 code> public func captureDevicePointOfInterestForPoint（pointInLayer：CGPoint） - > CGPoint 
  

将根据AVCaptureVideoPreviewLayer的设置指定设备的焦点。请参见文档。 / p>

What is the best way to create an accurate Auto Focus and Exposure for AVFoundation custom layer camera?, for example, currently my camera preview layer is square, I would like the camera focus and exposure to be specify to that frame bound. I need this in Swift 2 if possible, if not please write your answer I would be able to convert it myself.

Current Auto Focus and Exposure: But as you can see this will evaluate the entire view when focusing.

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    //Get Touch Point
    let Point = touches.first!.locationInView(self.capture)
    //Assign Auto Focus and Auto Exposour
    if let device = currentCameraInput {
        do {
            try! device.lockForConfiguration()
            if device.focusPointOfInterestSupported{
                //Add Focus on Point
                device.focusPointOfInterest = Point
                device.focusMode = AVCaptureFocusMode.AutoFocus
            }

            if device.exposurePointOfInterestSupported{
                //Add Exposure on Point
                device.exposurePointOfInterest = Point
                device.exposureMode = AVCaptureExposureMode.AutoExpose
            }
            device.unlockForConfiguration()
        }
    }
}

Camera Layer: Anything in the 1:1 ratio should be considered as focus and exposure point, and anything outside this bound would not even be considered as a touch event for camera focus.

解决方案

 public func captureDevicePointOfInterestForPoint(pointInLayer: CGPoint) -> CGPoint

will give you the point for the device to focus on based on the settings of your AVCaptureVideoPreviewLayer. See the docs.

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