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# 10 segons de vídeo.
from picamera import PiCamera
from time import sleep
camera = PiCamera()
camera.start_preview(alpha=200)
sleep(10)
camera.stop_preview()
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# Guardar una imatge
camera.start_preview()
sleep(5)
camera.capture('/home/pi/Desktop/image.jpg')
camera.stop_preview()
# És important posar a dormir com a mínim 2 segons abans de capturar la imatge.
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# 5 imatges seguides
camera.start_preview()
for i in range(5):
sleep(5)
camera.capture('/home/pi/Desktop/image{}.jpg'.format(i))
camera.stop_preview()
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camera.start_preview()
camera.start_recording('/home/pi/video.h264')
sleep(10)
camera.stop_recording()
camera.stop_preview()
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camera.resolution = (2592, 1944)
camera.framerate = 15
camera.start_preview()
sleep(5)
camera.capture('/home/pi/Desktop/max.jpg')
camera.stop_preview()
La ressolució mínima és de 64x64, proveu de fer una foto amb aquesta ressolució
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camera.start_preview()
camera.annotate_text = "Hello world!"
sleep(5)
camera.capture('/home/pi/Desktop/text.jpg')
camera.stop_preview()
Es pot ajustar la mida del texte així:
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camera.annotate_text_size = 50
Les mides vàlides van de 6 a 160. Per defecte és 32.
També es pot ajustar el color del texte:
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from picamera import PiCamera, Color
camera.start_preview()
camera.annotate_background = Color('blue')
camera.annotate_foreground = Color('yellow')
camera.annotate_text = " Hello world "
sleep(5)
camera.stop_preview()
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# brillantor
camera.start_preview()
for i in range(100):
camera.annotate_text = "Brightness: {}s".format(i)
camera.brightness = i
sleep(0.1)
camera.stop_preview()
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# contrast
camera.start_preview()
for i in range(100):
camera.annotate_text = "Contrast: {}s".format(i)
camera.contrast = i
sleep(0.1)
camera.stop_preview()
Amb camera.image_effect
pots aplicar un determinat efecte a l'imatge. Les opcions són : none
, negative
, solarize
, sketch
, denoise
, emboss
, oilpaint
, hatch
, gpen
, pastel
, watercolor
, film
, blur
, saturation
, colorswap
, washedout
, posterise
, colorpoint
, colorbalance
, cartoon
, deinterlace1
, i deinterlace2
. Proveu-los!!!
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camera.start_preview()
camera.image_effect = 'colorswap'
sleep(5)
camera.capture('/home/pi/Desktop/colorswap.jpg')
camera.stop_preview()
Per provar-los tots podem fer:
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camera.start_preview()
for effect in camera.IMAGE_EFFECTS:
camera.image_effect = effect
camera.annotate_text = "Effect: {}".format(effect)
sleep(5)
camera.stop_preview()
Amb camera.awb_mode
podeu tocar els nivells de blanc. Les opcions són: off, auto, sunlight, cloudy, shade, tungsten, fluorescent, incandescent, flash, i horizon. Per defecte el valor és auto.
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camera.start_preview()
camera.awb_mode = 'sunlight'
sleep(5)
camera.capture('/home/pi/Desktop/sunlight.jpg')
camera.stop_preview()
Amb camera.exposure_mode
podeu tocar el mode d'exposicó. Les opcions són off, auto, night, nightpreview, backlight, spotlight, sports, snow, beach, verylong, fixedfps, antishake, i fireworks. L'opció per defecte és auto.
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camera.start_preview()
camera.exposure_mode = 'beach'
sleep(5)
camera.capture('/home/pi/Desktop/beach.jpg')
camera.stop_preview()
Twython:
pip3 install twython
Per configurar l'accés a twitter mireu aquest link:
https://www.raspberrypi.org/learning/getting-started-with-the-twitter-api/
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from twython import Twython
from picamera import PiCamera
from time import sleep
from datetime import datetime
import random
from auth import (
consumer_key,
consumer_secret,
access_token,
access_token_secret
)
twitter = Twython(
consumer_key,
consumer_secret,
access_token,
access_token_secret
)
camera = PiCamera()
timestamp = datetime.now().isoformat()
photo_path = '/home/pi/tweeting-babbage/photos/{}.jpg'.format(timestamp)
sleep(3)
camera.capture(photo_path)
with open(photo_path, 'rb') as photo:
twitter.update_status_with_media(status=message, media=photo)