Android摄像头抓取图像的格式

最新推荐文章于 2022-09-17 10:59:20 发布

weixin_30577801

最新推荐文章于 2022-09-17 10:59:20 发布

阅读量106

点赞数

CC 4.0 BY-SA版权

文章标签：移动开发

原文链接：http://www.cnblogs.com/exmyth/p/4973584.html

本文详细介绍了Android中Camera.PreviewCallback接口的作用及其使用方法。该接口用于接收并处理相机预览帧的数据，通过onPreviewFrame方法可以获取到每帧预览图像的数据，这对于实现实时图像处理等功能至关重要。

android.hardware.Camera.PreviewCallback

/**
* Callback interface used to deliver copies of preview frames as
* they are displayed.
*
* @see #setPreviewCallback(Camera.PreviewCallback)
* @see #setOneShotPreviewCallback(Camera.PreviewCallback)
* @see #setPreviewCallbackWithBuffer(Camera.PreviewCallback)
* @see #startPreview()
*/
public interface PreviewCallback
{
/**
* Called as preview frames are displayed. This callback is invoked
* on the event thread {@link #open(int)} was called from.
*
* @param data the contents of the preview frame in the format defined
* by {@link android.graphics.ImageFormat}, which can be queried
* with {@link android.hardware.Camera.Parameters#getPreviewFormat()}.
* If {@link android.hardware.Camera.Parameters#setPreviewFormat(int)}
* is never called, the default will be the YCbCr_420_SP
* (NV21) format.
* @param camera the Camera service object.
*/
void onPreviewFrame(byte[] data, Camera camera);
};