detect_pxs_multicore.py

from PIL import Image
import multiprocessing

def test_screen(pic): #Prozess
    file_prefix = 'MA_HA1_drawing_'
    file_postfix = '.png'
    file_name = file_prefix + str(pic) + file_postfix

    im = Image.open(file_name)
    pix = im.load()


    ws_o = 756
    ws_u = 3712
    ws_l = 616
    ws_r = 6446


    defect_pix = 0
    for y in range(ws_o,ws_u,1):
        for x in range (ws_l,ws_r,1):
            if (pix[x,y][0] !=1 or pix[x,y][1] !=1 or pix[x,y][2] !=1):
                defect_pix = defect_pix +1
                #print 'Bei', x, y, '/', 'R:', pix[x,y][0], 'G:', pix[x,y][1], 'B', pix[x,y][2]

    return (pic,defect_pix)
    
nImages = 3
process_pool = multiprocessing.Pool(processes = nImages)
defect_pixels = process_pool.map(test_screen, range(nImages))

#for pic in range (nImages):
#    test_screen(pic)
#    procs.append(Process(target=test_screen, args=(pic,)))
#    procs.start()
#
#for p in procs:
#    p.join()

for pair in defect_pixels:
    print 'Anzahl der defekten Pixel bei Bildschirm #', pair[0], ': ', pair[1]