raspberry pi digicam

raspidigicam.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
#import RPi.GPIO as GPIO
import subprocess
import wiringpi2 as wiringpi
import time
from time import sleep
import picamera
import os
import syslog

# GPIO pin
SHUTTER_BTN = 17

# GPIO setting
wiringpi.wiringPiSetupGpio() # setting gpio number 
wiringpi.pinMode(SHUTTER_BTN, 0) # setting input
wiringpi.pullUpDnControl(SHUTTER_BTN, 2) # pulled up by 3.3V


# Camera Setting
shutter_numb = 0

# global
SleepStepSec = 0.1
home_dir = '/home/pi/photo'

def cameraLoad():
    global shutter_numb
    filename = os.path.join(home_dir, 'camera.set')
    fp = open(filename)
    tmp_shutter_numb = fp.readlines() 
    tmp2_shutter_numb = tmp_shutter_numb[0].rstrip()
    shutter_numb = int(tmp2_shutter_numb)
    fp.close()

def cameraSave():
    filename = os.path.join(home_dir, 'camera.set')
    fp = open(filename, 'w')
    fp.write(str(shutter_numb))
    fp.close()

def shutter():
    if KeepWatchForSeconds(5):
        CallShutdown()

    global shutter_numb
    shutter_numb += 1
    cameraSave()

    filename = os.path.join(home_dir, str(shutter_numb) + '.jpg')
    photofile = open(filename, 'wb')
    with picamera.PiCamera() as camera:
        camera.resolution = (2592,1944)
        camera.start_preview()
        time.sleep(1.000) # initialize camera
        camera.capture(photofile)
        
    photofile.close()

def KeepWatchForSeconds(seconds):
    GoFlag = True
    if seconds < 1:
        seconds = 1
    while seconds > 0:
        time.sleep(SleepStepSec)
        seconds -= SleepStepSec
        if (wiringpi.digitalRead(SHUTTER_BTN) == True):
            GoFlag = False
            break
    return GoFlag

def CallShutdown():
    syslog.syslog(syslog.LOG_NOTICE, "Going shutdown by GPIO.")
    cmd = "/sbin/shutdown -h now 'Poweroff by GPIO'"
    subprocess.call(cmd, shell=True)

cameraLoad()

while True:
    sleep(0.5)
    if (wiringpi.digitalRead(SHUTTER_BTN) == False):
        shutter()

Raspberry Pi2 + Raspbian Jessie

$ cd
$ git clone https://gist.github.com/8263451c7310f6fd203c.git raspidigicam
$ chmod 755 raspidigicam/raspidigicam.py
$ sudo cp raspidigicam/raspidigicam.py /usr/local/bin/
$ mkdir photo
$ echo 0 > photo/camera.set

Edit /etc/rc.d/rc.local
Add next command to last line

sudo raspidigicam.py