ImageReader saves pictures and transfers them to opencvmat

Table of contents

ImageReader saves pictures

turn opencv

---

ImageReader saves pictures

// 创建一个ImageReader对象
ImageReader reader = ImageReader.newInstance(width, height, ImageFormat.JPEG, 1);

reader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() {
    @Override
    public 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();
            }
        }
    }
}

turn 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++ part:

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++ part:

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