How to capture a Picture

Question

I am currently using `HelloARMultiTarget_SameImage` Sample . I need to put a capture button and capture an image . But i can not find any method in `HelloAR.java` and `CameraDevice.java` . How can i will be able to to take picture during Scanning ? Is it possible with EasyAR's `CameraDevice` or i have to use create my own  camera ?

Please let me know stuck here for 2 days .

Thanks.

Answer 1

First of all, the easyar SDK does not have the ability to integrate screenshots, which is not the core feature of the easyar SDK. It is recommended that you use third-party plugins

Answer 2

Yes, it is possible to capture frames from the video using the EasyAR CameraDevice.

At the EasyAR Android Samples, on the file HelloAR, method initialize(), a CameraFrameStreamer is created from the CameraDevice. You will use the CameraFrameStreamer to capture the frames. 

I recommend you do the frame capture at the render() method, do like that:

Frame frame = streamer.peek();
if (frame.images().size()>0) {
    int size = frame.images().get(0).buffer().size();
    byte[] raw_frame = new byte[size];
    frame.images().get(0).buffer().copyTo(raw_frame, 0);
}

This raw_frame pixels are on the NV21 format. You can convert it to Y or RGB, look at this explanation:

https://stackoverflow.com/questions/5272388/extract-black-and-white-image-from-android-cameras-nv21-format/12702836#12702836

Comments

and in unity?

---

In Unity, I don't know how to do, but should be possible.