本文实例为大家分享了树莓派动作捕捉抓拍存储图像的具体代码，供大家参考，具体内容如下
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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 file name 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 = 75# this is the default setting, if the whole image should be scanned for changed pixeltestareacount = 1testborders = [ [[1,testwidth],[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 = 2# testborders = [ [[1,50],[1,75]], [[51,100],[26,75]] ] # area y=1 to 25 not scanned in x=51 to 100# even more complex example# testareacount = 4# testborders = [ [[1,39],[1,75]], [[40,67],[43,75]], [[68,85],[48,75]], [[86,100],[41,75]] ]# 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 + "-%04d%02d%02d-%02d%02d%02d.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(0,1) 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(0,100) with default-values for y in xrange(testborders[z][1][0]-1, testborders[z][1][1]): # = xrange(0,75) with default-values; testborders are not zero-based, buffer1[x,y] are zero-based (0,0 is top left of image, testwidth-1,testheight-1 is botton right) if (debugmode): debugim[x,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" % (x,y) debugim[x,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[x,y][1] - buffer2[x,y][1]) if pixdiff > threshold: changedpixels += 1 if (debugmode): debugim[x,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 debug image 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 |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
