Since the JetBot uses a Raspberry Pi camera, we also consider using the Raspberry Pi camera as the first choice. Of course, USB cameras have been tested and confirmed to work.
Note that our JetBot has already flashed the system.
Purchase Raspberry Pi Camera
Initially, we tried to buy a Raspberry Pi camera for dozens of yuan from Taobao, but it was confirmed to not work.
In fact, the Raspberry Pi camera used by NANO needs to be the IMX219 sensor,
which means the Raspberry Pi Camera Module v2 is acceptable. I checked on Taobao, and the prices are around 150 yuan.
Install Raspberry Pi Camera
We still use the video from Jetsonhacks to explain how to install the Raspberry Pi camera, as he has demonstrated it in great detail.
First, gently pull up this pin on the CSI interface of the Nano, remember to be careful and do not break it:
Then insert the ribbon cable of the Raspberry Pi camera, paying attention to the direction and whether it is reversed:
Fix this pin:
Now it is installed, check it:
Also, don’t forget to remove the protective film from the camera:
Open Your First Camera Image
Check if the Raspberry Pi is installed correctly, we can take a look:
This indicates that the Raspberry Pi has been installed correctly.
Input this command:
$ gst-launch-1.0 nvarguscamerasrc ! ‘video/x-raw(memory:NVMM),width=3820, height=2464, framerate=21/1, format=NV12’ ! nvvidconv flip-method=0 ! ‘video/x-raw,width=960, height=616’ ! nvvidconv ! nvegltransform ! nveglglessink -e
You can successfully open the camera. This requires GStreamer to open a 3820-pixel wide, 2464-pixel high camera stream and display it in a 960-pixel wide, 616-pixel high window.
Let’s test another example:
$ python simple_camera.py
simple_camera.py is a Python script that reads data from the camera and displays a window on the screen using OpenCV.
Try it out yourself.
Finally, let’s try a face recognition example:
$ python face_detect.py
face_detect.py is a Python script that reads data from the camera and uses Haar Cascades to detect faces and eyes. Let’s see if it can really recognize your face and eyes?
Note that NVIDIA has an online live broadcast on April 29, welcome developers interested in artificial intelligence to participate:
More Beginner’s Manuals:
Beginner’s Manual (1):Installing DC Power Supply on Jetson Nano
Filling Pit Series (1): Buying Nano with my own hands, crying to light it up!
Someone compared and tested Google Coral Edge TPU and NVIDIA Jetson Nano, and the result was….
