Camera - Fill in Dummy Functions

[mlivai]

(0.5 hr) Fill in the "dummy" functions you defined earlier with real, working code. Include instructions for testing the code by running demo.py (what should happen when you run it?)

• [x] fill in set up function
• [x] fill in capture image function
• [x] instructions for testing demo.py

[mlivai]

References:

1. https://projects.raspberrypi.org/en/projects/getting-started-with-picamera/7

2. https://picamera.readthedocs.io/en/release-1.13/recipes1.html#capturing-to-a-file

[mlivai]

def setupCamera():
    #Sets up Camera
    #Sets resolutions of camera to highest resolution
    camera.resolution = (2592, 1944)
    #Sets framerate to support highest resolution
    camera.framerate = 15

[Reference: 2]

[mlivai]

def takePicture():
    #takes a still (image) using camera
    #starts live display of cameras input
    camera.start_preview()
    #delay of 5 seconds
    sleep(5)
    #captures the still and saves it to desktop
    campera.capture('/home/pi/Desktop/piimage.jpg')
    #stops camera input
    camera.stop_preview()
    print("A picture was taken.")

[Reference: 1 & 2]

[ajb974]

Make sure you change campera.capture('/home/pi/Desktop/piimage.jpg') when we need to take more than one photo

[mlivai]

Functions imported into KibbleKounter.py (No library install required):

from time import sleep
from picamera import PiCamera

picamera object defined outside of functions: camera = None

[mlivai]

Updated function to return picamera object:

def setupCamera():
    #Sets up Camera
    camera = PiCamera()
    #Sets resolutions of camera to highest resolution
    camera.resolution = (2592, 1944)
    #Sets framerate to support highest resolution
    camera.framerate = 15
    return camera

[Reference: 1]

[mlivai]

Updated function to take a camera object, filename as a parameter and return the file path:

def takePicture(camera, filename):
    #takes a still (image) using camera
    #starts live display of cameras input
    camera.start_preview()
    #captures the still and saves it to desktop
    camera.capture('/home/pi/Desktop/%s.jpg' % filename)
    #stops camera input
    camera.stop_preview()
    return ('/home/pi/Desktop/%s.jpg' % filename)  

[Reference: 1 & 2]

[mlivai]

Code for demo.py:

import KibbleKounter
import time

camera = KibbleKounter.setupCamera()
fname= KibbleKounter.takePicture(camera,'picture1')
print (fname) 

Instructions for running demo.py:

1. Run: cd Kibble-Kounter1
2. Run: nano demo.py
3. Define the filename. In this code the file name is 'picture1'.
4. Run: python3 demo.py. The file path should be printed.
5. The picture should be at the location it states in the file path. In this code it would be '/home/pi/Desktop/picture1.jpg'.

[ajb974]

Good job!