OpenCV, Python, camera, Raspberry Pi

_README.md

From http://users.fs.cvut.cz/ivo.bukovsky/PVVR/prace_studentu/Jenc_RPi_kamery_s_FFT.pdf

• IP camera: http://www.adminek.cz/2016/07/10/ip-kamera-s-raspberry-pi-3/
• IP camera distro: https://github.com/ccrisan/motioneyeos
• IP camera motion: http://www.raspi.cz/2014/08/motion-raspberry-kamerou/
• 8MPx cam: https://arduino-shop.cz/arduino/2971-oficialni-raspberry-pi-kamera-v2.html
• RPi cams Feature matrix: https://rlxcomponents.com/cs/camera-for-raspberry-pi/6244-rpi-camera-v2-ws-11633-official-raspberry-pi-camera-module-v2-8mpix-2510728.html
• $38 IR USB cam: https://www.aliexpress.com/item/1080p-3-6mm-lens-OV2710-endoscope-cmos-usb-ir-camera-module-with-ir-cut-led-board/32274943813.html
• 12V IR array: https://www.alibaba.com/product-detail/60-120m-850nm-infrared-15-pcs_60716810965.html
• IR arrays, Amazon: https://www.amazon.com/IR-Illuminators/b?ie=UTF8&node=7161095011

CSI-2-picamera.py

# sudo apt-get install python-picamera

import picamera
from time import sleep 

camera = picamera.PiCamera() 
camera.capture('image.jpg') 
camera.start_preview() 
camera.vflip = True
camera.hflip = True 
camera.brightness = 60 
camera.start_recording('video.h264') 
sleep(5) 
camera.stop_recording()

CSI-2-raspistill.sh

sudo raspi-config

raspistill -o fotka.jpg
raspistill -vf -hf -w 1920 –h 1080 -o fotka2.jpg

#           ms                     bitrate    framerate
raspivid -t 10000 -o video2.h264 –b3500000 –f 15

OpenCV-video.py

# sudo modprobe bcm2835-v4l2

import cv2
import os 
os.system('sudo modprobe bcm2835-v4l2') 
cap = cv2.VideoCapture(0) 
cap.set(3, 480) #sirka videa 

cap.set(4, 320) #vyska videa 
cap.read() #adjustace svetla 
while(True): 
    ret, frame = cap.read()
    cv2.imshow('frame',frame)
    if cv2.waitKey(1) & 0xFF == ord('q'):
        break

cap.release()
cv2.destroyAllWindows()

PhotoLoop.py

import cv2
cap = cv2.VideoCapture(0)   # Inicializace 
cap.read()                  # Adjustace svetla 
while(True):
    ret, frame = cap.read() 
    cv2.imshow('Fotka',frame) 
    if cv2.waitKey(1) & 0xFF == ord('q'): 
        break 

cap.release()            # uvolneni kamery 
cv2.destroyAllWindows()  # zavreni vsech vytvorenych oken

Resolutions.py

import time
import picamera

frames = [15,25,30,40,50,60,60,60,60] 
xres = [2592,1920,1600,1280,1024,800,640,480,320] 
yres = [1944,1080,900,720,600,600,480,320,240] 
j = 0

while (j < len(xres)): 
    with picamera.PiCamera() as camera: 
        camera.resolution = (xres[j], yres[j]) 
        camera.start_preview() 
        time.sleep(2)  # autoexpozice 
        start = time.time() 
        cesta = '/run/shm/image%03d.jpg'  #/run/shm je RAMdisk 
        camera.capture_sequence((cesta % i for i in range(frames[j])), use_video_port=True) 
        print('%d  %dx%d: Vyfoceno %d snimku pri %.2ffps' \
              %(j+1, xres[j], yres[j], frames[j], (frames[j]/(time.time() - start)) )) 
        camera.stop_preview()
        j = j + 1

SinglePhoto.py

sudo apt install -y python-opencv
python
>
import cv2
cam_port = 0  #cislo portu kamery 
cap = cv2.VideoCapture(cam_port) 
cap.read()    #adjustace svetla 
img_name = "fotka.png"
ret, img = cap.read() #vlastni foceni
cv2.imwrite(img_name, img) 
cap.release()
# Ctrl+D