layout: true .top-line[] --- class: center, middle # Raspberry Pi Camera --- ## Raspberry Pi Camera * Raspberry Pi Camera Module * Python and picamera - take still pictures - record video - image effects .footnote[https://projects.raspberrypi.org/en/projects/getting-started-with-picamera] --- ## Camera Hardware * Connect the Camera Module to the Raspberry Pi <img src="images/camera.png"> <img src="images/camera-connect.png"> --- ## Enable Camera * Enable camera software & Reboot * $ sudo raspi-config <img src="images/camera-enable.png"> --- ## Still Picture * $ cat cam.py ```python from picamera import PiCamera from time import sleep camera = PiCamera() # camera.start_preview() sleep(1) camera.capture('capture.jpg') # camera.stop_preview() ``` * $ python3 cam.py - capture.jpg * Preview only works when a monitor is connected to the Pi --- ## Get files * In Windows, you need pscp.exe (https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html) * pscp.exe pi@192.168.0.53:/home/pi/capture.jpg . <img src="images/pscp.png"> * In Linux, use scp command --- ## Rotate Camera * camera.rotation = 180 - 0, 90, 180, 270 --- ## Recording Video * $ cat record.py ```python from picamera import PiCamera from time import sleep camera = PiCamera() camera.rotation = 180 #camera.start_preview() camera.start_recording('recording.h264') sleep(1) camera.stop_recording() #camera.stop_preview() ``` * $ python3 record.py - recording.h264 --- ## Effects ```python camera.resolution = (2592, 1944) # maximum resolution is 2592 x 1944 for still photos and 1920 x 1080 for video recording camera.framerate = 15 camera.brightness = 70 # 0 ~ 100, The default is 50 camera.contrast = 50 # 0 ~ 100, The default is 50 camera.awb_mode = 'sunlight' # camera.AWB_MODES # off, auto, sunlight, cloudy, shade, tungsten, fluorescent, incandescent, flash, and horizon camera.exposure_mode = 'beach' # camera.EXPOSURE_MODES # off, auto, night, nightpreview, backlight, spotlight, sports, snow, beach, verylong, fixedfps, # antishake, and fireworks camera.annotate_text_size = 50 # 6 ~ 160. The default is 32. camera.annotate_background = Color('blue') camera.annotate_foreground = Color('yellow') camera.annotate_text = " Hello world " camera.image_effect = 'colorswap' # camera.IMAGE_EFFECTS # none, negative, solarize, sketch, denoise, emboss, oilpaint, hatch, gpen, pastel, watercolor, # film, blur, saturation, colorswap, washedout, posterise, colorpoint, colorbalance, cartoon, # deinterlace1, and deinterlace2 ``` --- ## Exercise * Take pictures with every exposure_mode and image_effect * Hint: ```python for effect in camera.IMAGE_EFFECTS: camera.image_effect = effect camera.annotate_text = "Effect: %s" % effect sleep(5) ``` * Make a single titled image with the pictures * Hint: ``` bash $ sudo apt update $ sudo apt install imagemagick $ montage *.jpg -mode Concatenate -tile 6x5 montage.jpg ``` <img src="images/montage.jpg" style="position:absolute;bottom:50px;right:50px">