The PiCamera software provides a number of effects and other configurations you can apply. Write some Python code to apply these effects.
You can change the resolution of the camera.
By default, it's set to the resolution of your monitor, but the maximum resolution is 2592 x 1944 for still photos and 1920 x 1080 for video recording.
Type code to set the resolution to max. Set the frame rate to 15 to enable this maximum resolution:
camera.resolution = (2592, 1944)
camera.framerate = 15
camera.start_preview()
sleep(5)
camera.capture('/home/pi/Desktop/max.jpg')
camera.stop_preview()The minimum resolution is 64 x 64. Try taking a video at that resolution and open it to see the difference.
Add text to your image with annotate_text:
camera.start_preview()
camera.annotate_text = "Hello world!"
sleep(5)
camera.capture('/home/pi/Desktop/text.jpg')
camera.stop_preview()Adjust the brightness in a loop, and display the current brightness level:
camera.start_preview()
camera.brightness = 70
sleep(5)
camera.capture('/home/pi/Desktop/bright.jpg')
camera.stop_preview()Try the same for the contrast:
camera.start_preview()
for i in range(100):
camera.annotate_text = "Contrast: %s" % i
camera.contrast = i
sleep(0.1)
camera.stop_preview()Set the text size using this code:
camera.annotate_text_size = 50The default size is 32. You can choose any number between 6 and 160.
Alter the annotation colours. Ensure that 'Color' is imported by amending your import line at the top. Then amend the rest of your code as follows:
from picamera import PiCamera, Color
from time import sleep
camera = PiCamera()
camera.start_preview()
camera.annotate_background = Color('blue')
camera.annotate_foreground = Color('yellow')
camera.annotate_text = " Hello world "
sleep(5)
camera.stop_preview()Use camera.image_effect to apply a particular image effect.
The options are:
The default is none.
Pick one and try it out:
camera.start_preview()
camera.image_effect = 'colorswap'
sleep(5)
camera.capture('/home/Desktop/colorswap.jpg')
camera.stop_preview()Loop over the various image effects in a preview to test them out:
camera.start_preview()
for effect in camera.IMAGE_EFFECTS:
camera.image_effect = effect
camera.annotate_text = "Effect: %s" % effect
sleep(5)
camera.stop_preview()Use camera.awb_mode to set the auto white balance to a pre-set mode to apply a particular effect.
The options are:
The default is auto.
Pick one and try it out:
camera.start_preview()
camera.awb_mode = 'sunlight'
sleep(5)
camera.capture('/home/pi/Desktop/sunlight.jpg')
camera.stop_preview()Loop over the available auto white balance modes with camera.AWB_MODES.
Use camera.exposure_mode to set the exposure to a pre-set mode to apply a particular effect.
The options are:
The default is auto.
Pick one and try it out:
camera.start_preview()
camera.exposure_mode = 'beach'
sleep(5)
camera.capture('/home/pi/Desktop/beach.jpg')
camera.stop_preview()Loop over the available exposure modes with camera.EXPOSURE_MODES.
To learn more ways to use PiCamera, read the online documentation: https://picamera.readthedocs.io/