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#! / usr/bin/python# original script by brainflakes, improved by pageauc, peewee2 and Kesthal# www.raspberrypi.org/phpBB3/viewtopic.php?f=43&t=45235# You need to install PIL to run this script# type "sudo apt-get install python-imaging-tk" in an terminal window to do thisimport StringIOimport subprocessimport osimport timefrom datetime import datetimefrom PIL import Image# Motion detection settings:# Threshold-how much a pixel has to change by to be marked as "changed" # Sensitivity-how many changed pixels before capturing an image Needs to be higher if noisy view# ForceCapture-whether to force an image to be captured every forceCaptureTime seconds, values True or False# filepath-location of folder to save photos# filenamePrefix-string that prefixes the filename for easier identification of files.# diskSpaceToReserve-Delete oldest images to avoid filling disk. How much byte to keep free on disk.# cameraSettings-"" = no extra settings; "- hf" = Set horizontal flip of image; "- vf" = Set vertical flip "- hf-vf" = both horizontal and vertical flipthreshold = 10sensitivity = 20forceCapture = TrueforceCaptureTime = 60 * 60 # Once an hourfilepath = "/ home/pi/picam" filenamePrefix = "capture" diskSpaceToReserve = 40 * 1024 * 1024 # Keep 40 mb free on diskcameraSettings = "" # settings of the photos to savesaveWidth = 1296saveHeight = 972saveQuality = 15 # Set jpeg quality (0 to 100) # Test-Image settingstestWidth = 100testHeight = 7 to this is the default setting, if the whole image should be scanned for changed pixeltestAreaCount = 1testBorders = [[1 parentage width], [1 TestHeight] # [[start pixel on left side,end pixel on right side], [start pixel on top side,stop pixel on bottom side]] # testBorders are NOT zero-based, the first pixel is 1 and the last pixel is testWith or testHeight# with "testBorders", you can define areas, where the script should scan for changed pixel# for example, if your picture looks like this:##.... XXXX#. #. # # "." Is a street or a house, "X" are trees which move arround like crazy when the wind is blowing# because of the wind in the trees, there will be taken photos all the time. To prevent this, your setting might look like this:# testAreaCount = area testBorders = [[1jue 50], [1dje 75]], [[51100], [26jue 75]] # area yellow1 to 25 not scanned in Xuan 51 to 10] even more complex example# testAreaCount = testBorders = [[1mai 39], [1jue 75]], [[405,067], [43jue 75]], [[685,885], [48,875], [[86100], [41J] # in debug mode A file debug.bmp is written to disk with marked changed pixel an with marked border of scan-area# debug mode should only be turned on while testing the parameters abovedebugMode = False # False or True# Capture a small test image (for motion detection) def captureTestImage (settings, width, height): command = "raspistill% s-w% s-h% s-t 200-e bmp-n-o -"% (settings, width, height) imageData = StringIO.StringIO () imageData.write (subprocess.check_output (command) Shell=True) imageData.seek (0) im = Image.open (imageData) buffer = im.load () imageData.close () return im, buffer# Save a full size image to diskdef saveImage (settings, width, height, quality, diskSpaceToReserve): keepDiskSpaceFree (diskSpaceToReserve) time = datetime.now () filename = filepath + "/" + filenamePrefix + "- ddd-ddd.jpg"% (time.year, time.month, time.day, time.hour, time.minute Time.second) subprocess.call ("raspistill% s-w% s-h% s-t 200-e jpg-Q% s-n-o% s"% (settings, width, height, quality, filename), shell=True) print "Captured% s"% filename# Keep free space above given leveldef keepDiskSpaceFree (bytesToReserve): if (getFreeSpace ()

< bytesToReserve): for filename in sorted(os.listdir(filepath + "/")): if filename.startswith(filenamePrefix) and filename.endswith(".jpg"): os.remove(filepath + "/" + filename) print "Deleted %s/%s to avoid filling disk" % (filepath,filename) if (getFreeSpace() >

BytesToReserve): return# Get available disk spacedef getFreeSpace (): st = os.statvfs (filepath + "/") du = st.f_bavail * st.f_frsize return du# Get first imageimage1, buffer1 = captureTestImage (cameraSettings, testWidth, testHeight) # Reset last capture timelastCapture = time.time () while (True): # Get comparison image image2, buffer2 = captureTestImage (cameraSettings, testWidth, testHeight) # Count changed pixels changedPixels = 0 takePicture = False if (debugMode): # in debug mode Save a bitmap-file with marked changed pixels and with visible testarea-borders debugimage = Image.new ("RGB", (testWidth, testHeight)) debugim = debugimage.load () for z in xrange (0, testAreaCount): # = xrange (0L1) with default-values = z will only have the value of 0 = only one scan-area = whole picture for x in xrange (testborders [z] [0] [0]-1 TestBorders [z] [0] [1]): # = xrange (0100) with default-values for y in xrange (testBorders [z] [1] [0]-1, testBorders [z] [1] [1]): # = xrange (0Magne75) with default-values TestBorders are NOT zero-based, buffer1 [XMagi y] are zero-based (0is top left of image 0 is top left of image, testWidth-1,testHeight-1 is botton right) if (debugMode): debugim [XMagi y] = buffer2 [x Y] if ((x = = testBorders [z] [0] [0]-1) or (x = = testBorders [z] [0] [1]-1) or (y = = testBorders [z] [1] [0]-1) or (y = = testBorders [z] [1] [1]-1)): # print "Border% s% s"% (xQuery y) debugim [XMague y] = (0,0,255) # in debug mode Mark all border pixel to blue # Just check green channel as it's the highest quality channel pixdiff = abs (buffer1 [XMagi y] [1]-buffer2 [XMagi y] [1]) if pixdiff > threshold: changedPixels + = 1 if (debugMode): debugim [XMagi y] = (0,255,0) # in debug mode Mark all changed pixel to green # Save an image if pixels changed if (changedPixels > sensitivity): takePicture = True # will shoot the photo later if ((debugMode = = False) and (changedPixels > sensitivity)): break # break the y loop if ((debugMode = = False) and (changedPixels > sensitivity): break # break the x loop if ((debugMode = = False) and (changedPixels > sensitivity)): break # break the Z loop if (debugMode): debugimage.save (filepath + "/ debug.bmp") # save debugimage as bmp print "debug.bmp saved % s changed pixel "% changedPixels # else: # print"% s changed pixel "% changedPixels # Check force capture if forceCapture: if time.time ()-lastCapture > forceCaptureTime: takePicture = True if takePicture: lastCapture = time.time () saveImage (cameraSettings, saveWidth, saveHeight, saveQuality, diskSpaceToReserve) # Swap comparison buffers image1 = image2 buffer1 = buffer2 Thank you for reading this article carefully I hope the article "Raspberry pie how to achieve motion capture capture and save image script" shared by the editor will be helpful to you. At the same time, I hope you will support us and pay attention to the industry information channel. More related knowledge is waiting for you to learn!

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