ImageReader保存图片转 opencvmat

目录

ImageReader 直接保存图片，没成功，格式是yuv420，需要转换

转opencv

nv21保存图片，测试ok

rgb888 data保存图片：

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ImageReader 直接保存图片，没成功，格式是yuv420，需要转换

// 创建一个ImageReader对象
ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);reader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() {@Overridepublic void onImageAvailable(ImageReader reader) {Image image = null;try {image = reader.acquireLatestImage();if (image != null) {ByteBuffer buffer = image.getPlanes()[0].getBuffer();byte[] bytes = new byte[buffer.capacity()];buffer.get(bytes);saveImage(bytes);}} finally {if (image != null) {image.close();}}}
}, handler);// 保存图片
private void saveImage(byte[] bytes) {File file = new File(Environment.getExternalStorageDirectory() + "/picture.jpg");FileOutputStream output = null;try {output = new FileOutputStream(file);output.write(bytes);} catch (IOException e) {e.printStackTrace();} finally {if (null != output) {try {output.close();} catch (IOException e) {e.printStackTrace();}}}
}

转opencv

Image image = imageReader.acquireLatestImage();
Plane[] planes = image.getPlanes();
ByteBuffer bufferY = planes[0].getBuffer();
ByteBuffer bufferU = planes[1].getBuffer();
ByteBuffer bufferV = planes[2].getBuffer();
byte[] bytesY = new byte[bufferY.remaining()];
byte[] bytesU = new byte[bufferU.remaining()];
byte[] bytesV = new byte[bufferV.remaining()];
bufferY.get(bytesY);
bufferU.get(bytesU);
bufferV.get(bytesV);

c++部分：

cv::Mat imgY(height, width, CV_8UC1, bytesY);
cv::Mat imgU(height, width, CV_8UC1, bytesU);
cv::Mat imgV(height, width, CV_8UC1, bytesV);

c++部分：

cv::Mat imgYUV;
cv::merge(std::vector<cv::Mat>{imgY, imgU, imgV}, imgYUV);
cv::Mat imgRGB;
cv::cvtColor(imgYUV, imgRGB, cv::COLOR_YUV2RGB);

nv21保存图片，测试ok

     Yuv2Rgb.nativeNV21ToARGB8888(nv21, data, width[0], height[0]);long t2 = System.currentTimeMillis();// 假设你已经有了一个ARGB_8888格式的图像，存储在一个名为pixels的int数组中int width = 1920;int height = 1080;String file_name="/storage/emulated/0/Android/data/com.sandstar.jupiter.terminal.algor/files/"+mCameraId+"/"+frameIdx+"_b.jpg";YuvImage yuvImage = new YuvImage(nv21, ImageFormat.NV21, width, height, null);try {// 创建一个输出流来保存图片FileOutputStream outStream = new FileOutputStream(file_name);// 将YuvImage转换为JPEG，并保存到输出流中yuvImage.compressToJpeg(new Rect(0, 0, width, height), 100, outStream);// 关闭输出流outStream.close();} catch (IOException e) {e.printStackTrace();}

rgb888 data保存图片：

Yuv2Rgb.nativeNV21ToARGB8888(nv21, data, width[0], height[0]); // Create a Bitmap from the ARGB8888 data
Bitmap bitmap = Bitmap.createBitmap(data, width[0], height[0], Bitmap.Config.ARGB_8888);// Save the Bitmap as a JPEG file
FileOutputStream fos = null;
try {fos = new FileOutputStream("/path/to/your/file.jpg");bitmap.compress(Bitmap.CompressFormat.JPEG, 100, fos);
} catch (IOException e) {e.printStackTrace();
} finally {try {if (fos != null) {fos.close();}} catch (IOException e) {e.printStackTrace();}
}