相机使用自定义相机预览渲染器不清楚 [英] Camera Using custom Camera Preview Renderer is not clear

问题描述

我正在使用以下链接使用自定义渲染器显示相机预览

如何使相机预览更清晰，因为我希望稍后将其用于 OCR.

谢谢，

解决方案

我想您已经明白了这一点，但我将在此处发布解决方案以供参考.

您需要在相机属性中设置对焦模式".

Camera Preview = Camera.Open(1);//设置参数.如果(预览！= null){Camera.Parameters cameraParameters = Preview.GetParameters();//自动对焦cameraParameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;//放cameraPreview.Preview.SetParameters(cameraParameters);}

对于您提到的示例(https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/custom-renderer/view/) 您应该将此代码放在您的 Android Cutom Renderer 中(CameraPreviewRenderer 方法 OnElementChanged).>

它对我有用.希望这会有所帮助.

I am using the following link to display the camera preview using Custom renderers https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/custom-renderer/view/

I was able to bring up the camera preview. But the preview is not at all clear. There is no Auto focus as well. Screenshot for reference

How can I make the camera preview clearer, because I wish to use the same later on for OCR.

Thanks,

解决方案

I think you already figured this out but I'm going to post the solution here for reference.

You need to setup the "Focus Mode" in the Camera properties.

Camera Preview = Camera.Open(1);
// Set the parameters.
if (Preview != null)
{
    Camera.Parameters cameraParameters = Preview.GetParameters();
    // Autofocus
    cameraParameters.FocusMode = Camera.Parameters.FocusModeContinuousPicture;
    // Set
    cameraPreview.Preview.SetParameters(cameraParameters);
}

For the example you mentioned (the one in https://developer.xamarin.com/guides/xamarin-forms/application-fundamentals/custom-renderer/view/) you should place this code in you Android Cutom Renderer (CameraPreviewRenderer method OnElementChanged).

It worked for me. Hope this helps.

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