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watch -n .1 cat /proc/sys/kernel/random/entropy_availNate Silver
The Signal and the Noise: The Art and Science of Prediction
##noise ##math ##entropymaex@:~/ghostradio/code$ more ghostradio.py
import numpy as np
import cv2
import os, sys, struct, shutil, time
print "configuring video dev"
# 1 = composite 0 = tuner usw
os.system("v4l2-ctl -i 1")
cap = cv2.VideoCapture(0)
#resolution
ret = cap.set(3,720)
ret = cap.set(4,576)
timestr = time.strftime("%Y%m%d-%H%M%S")
grname = "gr-random-bin"+timestr
fd = os.open(grname,os.O_RDWR|os.O_CREAT)
while(True):
# Capture frame-by-frame
ret, frame = cap.read()
# Our operations on the frame come here
gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
for x in xrange(1, 12): # zeilen anzahl und position 1 = start 2 =laenge (bei 640x480 ist das theoretisch 1, 479)
for y in xrange(1, 18): # scanrange 1 start 2 ende (zb fuer 640x480 ist das dann 1, 640)
output = gray[x, y]
# output = bin(gray[x ,y])[2:].zfill(8)
# print bin(gray[x ,y])[2:].zfill(8)
output = chr(output)
os.write(fd, output)
# change to this to write down numbers:
# output = str(output)
# os.write(fd, output+';')
# Display the resulting frame
cv2.imshow('frame',gray)
if cv2.waitKey(1) & 0xFF == ord('q'):
break
#checking filesize > 2gb close file open new filename+timestamp
statinfo = os.stat(grname)
b = statinfo.st_size
b = ((b /1024)/1024)
if b > 2000:
os.close(fd)
shutil.move('gr-random-bin'+timestr,'random')
timestr = time.strftime("%Y%m%d-%H%M%S")
grname = "gr-random-bin"+timestr
fd = os.open("gr-random-bin"+timestr,os.O_RDWR|os.O_CREAT)
# When everything done, release the capture
os.close(fd)
cap.release()
cv2.destroyAllWindows()
maex@:~/ghostradio/code$
##ghostradio
##linux
##entropy
##cryptoart
http://www.cypherpunks.to/~peter/06_random.pdf">www.cypherpunks.to/~peter/06_random.pdfhttp://http://www.linuxfromscratch.org/hints/downloads/files/entropy.txt">http://www.linuxfromscratch.org/hints/downloads/files/entropy.txt the best random number generators use radioactive decay as an entropy source