{"id":157,"date":"2018-08-18T10:13:00","date_gmt":"2018-08-18T10:13:00","guid":{"rendered":"http:\/\/doctor-dark.co.uk\/blog\/2018\/08\/18\/recent-python-door-cam-code-ugly-but-works\/"},"modified":"2023-12-18T12:19:02","modified_gmt":"2023-12-18T12:19:02","slug":"recent-python-door-cam-code-ugly-but-works","status":"publish","type":"post","link":"https:\/\/doctor-dark.co.uk\/blog\/recent-python-door-cam-code-ugly-but-works\/","title":{"rendered":"Recent python door cam code – ugly, but works."},"content":{"rendered":"
\nUpdated version of the code…<\/b>
\nIt deals with the occasional hangs in the camera capture process by<\/b>
\nrebooting when they happen. A line in \/etc\/rc.local runs the program again.<\/b><\/p>\n

# Program for PiDoorCam<\/p>\n

# Detects motion, and when it spots some, takes a high resolution
\n# picture, and sends the picture to PiScreen<\/p>\n

import io
\nimport os
\nimport picamera
\nimport ftplib
\nimport time
\nfrom datetime import datetime
\nfrom PIL import Image
\nimport requests<\/p>\n

camera = picamera.PiCamera()
\npicamera.PiCamera.CAPTURE_TIMEOUT = 30<\/p>\n

# If we detect 100 pixels that changed by 30, we have seen movement.
\n#difference = 30
\n#pixels = 100
\n# Desensitise!
\n#difference = 30
\ndifference = 50
\npixels = 150<\/p>\n

# May as well use the maximum resolution of the camera.
\n# This is for V1. V2 is 3280 x 2464.
\nwidth = 2592
\nheight = 1944<\/p>\n

# I copied this voodoo motion detection from somewhere. Changed the timeout
\n#  setting above to prevent the occasional failures to complete captures.
\ndef compare():
\n   camera.resolution = (100, 75)
\n   stream = io.BytesIO()
\n   format = ‘bmp’
\n   # Handle occasional ‘Timed out waiting for capture to end’
\n   try:
\n      camera.capture(stream, format)
\n   except:
\n      print (“Camera timed out, reboot needed!”)
\n      os.system(“sudo reboot now”)
\n       
\n   stream.seek(0)
\n   im = Image.open(stream)
\n   buffer = im.load()
\n   stream.close()
\n   return im, buffer<\/p>\n

# Function to take a new high resolution picture, send it to PiScreen
\n# send it to my phone, and then delete it.
\ndef newimage(width, height):
\n    when = datetime.now()
\n    filename = “door-%04d%02d%02d-%02d%02d%02d.jpg” % (when.year, when.month, when.day, when.hour, when.minute, when.second)
\n    camera.resolution = (width, height)
\n    camera.capture(filename)<\/p>\n

    connected = True
\n    ftp = ftplib.FTP()
\n    ftp.connect(“PiScreen”)
\n   
\n    try:
\n        ftp.login(“pi”,”******************”)
\n    except ftplib.all_errors:
\n        connected = False
\n        print (“Failed to connect to server %s” % e)   
\n       
\n    if connected:
\n        ftp.storbinary(‘STOR ‘+filename, open(filename, “rb”))
\n        print (“Sent “, filename)<\/p>\n

    ftp.quit()<\/p>\n

# Code to send the Pushover message. Make picture smaller first.
\n    im = Image.open(filename)
\n    im.resize((324,243),Image.ANTIALIAS)
\n    im.save(filename)
\n   
\n    r = requests.post(“https:\/\/api.pushover.net\/1\/messages.json”, data = {
\n        “token”: “***********************************”,
\n        “user”: “*************************************”,
\n        “device”: “***********”,
\n        “sound”: “intermission”,
\n        “message”: filename
\n    },
\n    files = {
\n        “attachment”: (filename, open(filename, “rb”), “image\/jpeg”)
\n    })
\n# Check r for problems – maybe put a delay here?
\n    if r.status_code != 200:
\n        print(“Pushover message failed.”)
\n    else:
\n        print(“Pushover accepted the message.”)
\n       
\n# Now delete the file.
\n    os.remove(filename)
\n    # Delay to avoid being nasty to Pushover server.
\n    time.sleep(5)<\/p>\n

# Main program.<\/p>\n

camera.rotation = 180
\nprint(“Running door.py”)
\nimage1, buffer1 = compare()<\/p>\n

newimage(width, height)<\/p>\n

while (True):<\/p>\n

   image2, buffer2 = compare()<\/p>\n

   changedpixels = 0
\n   for x in range(0, 100):
\n      for y in range(0, 75):
\n         pixdiff = abs(buffer1[x,y][1] – buffer2[x,y][1])
\n         if pixdiff > difference:
\n            changedpixels += 1<\/p>\n

   if changedpixels > pixels:
\n      newimage(width, height)<\/p>\n

   image1 = image2
\n   buffer1 = buffer2<\/p>\n

\n
<\/b>
\nCode below is an older version, the “error handling” doesn’t actually work.<\/b><\/p>\n

# Program for PiDoorCam<\/p>\n

# Detects motion, and when it spots some, takes a high resolution
\n# picture, and sends the picture to PiScreen<\/p>\n

import io
\nimport os
\nimport picamera
\nimport ftplib
\nimport time
\nfrom datetime import datetime
\nfrom PIL import Image
\nimport requests<\/p>\n

camera = picamera.PiCamera()
\npicamera.PiCamera.CAPTURE_TIMEOUT = 30<\/p>\n

# If we detect 100 pixels that changed by 30, we have seen movement.
\n#difference = 30
\n#pixels = 100
\n# Desensitise!
\ndifference = 30
\npixels = 150<\/p>\n

# May as well use the maximum resolution of the camera.
\n# This is for V1. V2 is 3280 x 2464.
\nwidth = 2592
\nheight = 1944<\/p>\n

# I copied this voodoo motion detection from somewhere. Changed the timeout
\n#  setting above to prevent the occasional failures to complete captures.
\ndef compare():
\n   camera.resolution = (100, 75)
\n   stream = io.BytesIO()
\n   format = ‘bmp’
\n   # Handle occasional ‘Timed out waiting for capture to end’
\n   try:
\n      camera.capture(stream, format)
\n   except:
\n      print (“Retrying camera.capture()”)
\n      camera.capture(stream, format)
\n 
\n   stream.seek(0)
\n   im = Image.open(stream)
\n   buffer = im.load()
\n   stream.close()
\n   return im, buffer<\/p>\n

# Function to take a new high resolution picture, send it to PiScreen
\n# send it to my phone, and then delete it.
\ndef newimage(width, height):
\n    when = datetime.now()
\n    filename = “door-%04d%02d%02d-%02d%02d%02d.jpg” % (when.year, when.month, when.day, when.hour, when.minute, when.second)
\n    camera.resolution = (width, height)
\n    camera.capture(filename)<\/p>\n

    connected = True
\n    ftp = ftplib.FTP()
\n    ftp.connect(“PiScreen”)
\n 
\n    try:
\n        ftp.login(“pi”,”**********************************”)
\n    except ftplib.all_errors:
\n        connected = False
\n        print (“Failed to connect to server %s” % e) 
\n     
\n    if connected:
\n        ftp.storbinary(‘STOR ‘+filename, open(filename, “rb”))
\n        print (“Sent “, filename)<\/p>\n

    ftp.quit()<\/p>\n

# Code to send the Pushover message. Make picture smaller first.
\n    im = Image.open(filename)
\n#    im.resize((648,486),Image.ANTIALIAS)
\n    im.resize((324,243),Image.ANTIALIAS)
\n    im.save(filename)
\n 
\n    r = requests.post(“https:\/\/api.pushover.net\/1\/messages.json”, data = {
\n        “token”: “**********************************”,
\n        “user”: “********************************”,
\n        “device”: “************”,
\n        “sound”: “intermission”,
\n        “message”: filename
\n    },
\n    files = {
\n#        “attachment”: (“image.jpg”, open(filename, “rb”), “image\/jpeg”)
\n        “attachment”: (filename, open(filename, “rb”), “image\/jpeg”)
\n    })
\n# Check r for problems – maybe put a delay here?
\n    if r.status_code != 200:
\n        print(“Pushover message failed.”)
\n    else:
\n        print(“Pushover accepted the message.”)
\n       
\n# Now delete the file.
\n    os.remove(filename)
\n    # Delay to avoid being nasty to Pushover server.
\n    time.sleep(5)<\/p>\n

# Main program.<\/p>\n

camera.rotation = 180
\nprint(“Running door.py”)
\nimage1, buffer1 = compare()<\/p>\n

newimage(width, height)<\/p>\n

while (True):<\/p>\n

   image2, buffer2 = compare()<\/p>\n

   changedpixels = 0
\n   for x in range(0, 100):
\n      for y in range(0, 75):
\n         pixdiff = abs(buffer1[x,y][1] – buffer2[x,y][1])
\n         if pixdiff > difference:
\n            changedpixels += 1<\/p>\n

   if changedpixels > pixels:
\n      newimage(width, height)<\/p>\n

   image1 = image2
\n   buffer1 = buffer2<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Updated version of the code… It deals with the occasional hangs in the camera capture process by rebooting when they happen. A line in \/etc\/rc.local runs the program again. # Program for PiDoorCam # Detects motion, and when it spots some, takes a high resolution # picture, and sends the picture to PiScreen import io … Continue reading “Recent python door cam code – ugly, but works.”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-157","post","type-post","status-publish","format-standard","hentry","category-raspberry-pi"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/posts\/157","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/comments?post=157"}],"version-history":[{"count":1,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/posts\/157\/revisions"}],"predecessor-version":[{"id":426,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/posts\/157\/revisions\/426"}],"wp:attachment":[{"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/media?parent=157"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/categories?post=157"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/doctor-dark.co.uk\/blog\/wp-json\/wp\/v2\/tags?post=157"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}