South London Pioneers - Picamera

Transcript

1. Python Picamera with the Sense HAT Introducing the camera board and Python module
2. Raspberry Pi camera module - 5Mpx / 8Mpx - Full HD - Photo & video - Command line - Python module - Infra-red camera
3. Connect the camera
4. Open Python 3
5. IDLE Python Shell >>> from picamera import PiCamera >>> from sense_hat import SenseHat >>> camera = PiCamera() >>> sense = SenseHat() >>> sense.stick.direction_up = camera.start_preview >>> sense.stick.direction_down = camera.stop_preview
6. Open a new file • File > New File • File > Save • Save as camera.py
7. Take a selfie from picamera import PiCamera from time import sleep camera = PiCamera() camera.start_preview() sleep(3) camera.capture("/home/pi/image.jpg") camera.stop_preview() Save and run: Ctrl + S F5
8. Add joystick code from picamera import PiCamera from sense_hat import SenseHat from time import sleep camera = PiCamera() sense = SenseHat() camera.start_preview() sense.stick.wait_for_event(True) sleep(3) camera.capture("/home/pi/sense.jpg") camera.stop_preview()
9. Picamera effects
10. Picamera effects camera.start_preview() sense.stick.wait_for_event(True) camera.image_effect = 'negative' sleep(5) camera.capture("/home/pi/negative.jpg") camera.stop_preview() Try more effects: - negative - colorswap - sketch - emboss
11. Picamera effects import random camera.start_preview() for i in range(5): sense.stick.wait_for_event(True) effect = random.choice(list(camera.IMAGE_EFFECTS)) camera.image_effect = effect camera.annotate_text = effect sleep(5) camera.capture("/home/pi/{}.jpg".format(effect)) camera.stop_preview() Try more effects: - negative - colorswap - sketch - emboss
12. Documentation and help guides • picamera.readthedocs.io • pythonhosted.org/sense-hat • raspberrypi.org/resources
13. What next? • Time-lapse • Stop motion animation • Wildlife camera
14. What next? • Sensor trigger • Send to social media • Robotics