sample_camera_viewer.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This is a sample notebook to check if the USB camera you're using is working properly."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "This first cell will get the camera for the camera feed. If you are getting an error, run the following command and replace `last_char_int` in the `capture_device`with the dev video array index you got (the end of the /dev/video section of the output).\n",
    "`!ls -ltrh /dev/video*`"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "from jetcam.usb_camera import USBCamera\n",
    "import subprocess\n",
    "\n",
    "output = subprocess.check_output('ls -ltrh /dev/video*', shell=True).decode('utf-8')\n",
    "lines = output.strip().split('\\n')\n",
    "last_char = lines[-1][-1]\n",
    "last_char_int = int(last_char)\n",
    "\n",
    "camera = USBCamera(width= 224, height= 224, capture_width=640, capture_height=480, capture_device=last_char_int)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import ipywidgets\n",
    "from IPython.display import display\n",
    "from jetcam.utils import bgr8_to_jpeg\n",
    "\n",
    "image = camera.read()\n",
    "\n",
    "image_widget = ipywidgets.Image(format='jpeg')\n",
    "\n",
    "image_widget.value = bgr8_to_jpeg(image)\n",
    "\n",
    "display(image_widget)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "camera.running = True\n",
    "\n",
    "def update_image(change):\n",
    "    image = change['new']\n",
    "    image_widget.value = bgr8_to_jpeg(image)\n",
    "    \n",
    "camera.observe(update_image, names='value')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "camera.unobserve(update_image, names='value')"
   ]
  }
 ],
 "metadata": {
  "language_info": {
   "name": "python"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}