python-scipy 图像处理

from PIL import Image

from numpy import *

from scipy.ndimage import filters

读入图像并转化成灰度图像

im=array(Image.open(‘lena.jpg’).convert(‘L’))

高斯滤波

im2=filters.gaussian_filter(im,5)

img=Image.fromarray(im)

img.show()

img2=Image.fromarray(im2)

img2.show()

sobel滤波器

imx=zeros(im.shape)

filters.sobel(im,1,imx)

imy=zeros(im.shape)

filters.sobel(im,0,imy)

magnitude=sqrt(imx**2+imy**2)

magnitudeimg=Image.fromarray(uint8(magnitude))

magnitudeimg.show()