WP7 (windows Phone 7) 如何使用PhotoCamera进行变焦？
我正在将 PhotoCamera 用于 AR 应用程序，我认为放大/缩小功能会是一个不错的选择。 但我不知道该怎么做。 PhotoCamera 类中没有缩放方法。
有人知道如何做吗？
I'm using the PhotoCamera for an AR app and I was thinking that a zoom in/out function would be a nice one.
But I can't figure out how to do it. There is no zoom method in the PhotoCamera Class.
Does anyone have a lead on how to do it ?
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我试图找出同样的问题。看来，没有办法用 PhotoCamera 类进行任何缩放。
实现缩放的唯一方法是通过裁剪图像并缩放图像来进行数字缩放。实现此目的的一种方法是简单地缩放视频画笔设置的 UI 元素（例如矩形）。如果您正在处理帧，则必须对从相机类获得的预览缓冲区应用相同的裁剪和缩放。
I've trying to figure out the same problem. It seems, that there is no way to do any zooming with PhotoCamera class.
The only way to implement a zoom is digitally zooming by cropping the image and scaling it. One way to do this, is simply to scale the UI element (for example Rectangle) that the videobrush is set to. If you are processing the frames, you have to apply the same cropping and scaling to the preview buffer that you get from the camera class.