filter.py

 for i in range(ancho):
        for j in range(alto):
            if array[i,j]<0:
                val = 0
            elif array[i,j]>255:
                val= 255
            else:
                val=int(array[i,j])
            imagen[i,j]=(val,val,val)
    im.save('coef'+str(cs)+'.png')