filtro.py

def filtro(img,ancho,alto):
    tiemp= time()
    pixel =img.load() 
    for i in range (ancho):
        for j in range(alto):
            c = 0
            prom = 0.0
            try:
                if(pixel[i+1,j]):
                    prom += pixel[i+1,j][0]
                    c +=1
            except:
                prom += 0
            try:
                if(pixel[i-1,j]):
                    prom += pixel[i-1,j][0]
                    c +=1
            except:
                prom += 0
            try:
                if(pixel[i,j+1]):
                    prom += pixel[i,j+1][0]
                    c+=1
            except:
                prom += 0
            try:
                if(pixel[i,j-1]):
                    prom += pixel[i,j-1][0]
                    c+=1
            except:
                prom += 0
            
            promt = int(prom/c)
            pixel[i,j] = (promt, promt, promt)
    im=img.save ('filtro.jpg')
    timei=time()
    timef= timei - tiemp
    print "Tiempo de ejecucion del filtro: "+str(timef)+"segundos"