【Python】skimage电脑视觉与图片影像处理（1）

Computer Vision & Image Processing

设置图片大小、灰阶图

题目

◎ 請選擇一張圖片使用剛剛學的利用skimage讀取進來
◎ 使用rgb2gray將圖片轉成灰階
◎ 使用matplotlib裡面的subplot及title將兩張圖一起顯
示做比較

代码

################读图##############
from skimage.io import imread, imshow
from skimage import data
import matplotlib.pyplot as plt
#设置路径
imgpath = 'C:/Users/student/Downloads/the-legend-of-zelda-breath-of-the-wild-switch-hero.jpg'
I = imread(imgpath)
imshow(I)
plt.show()"--------------------skimage内建图片--------------------------------"
from skimage import data
I2 = data.chelsea()
imshow(I2)
plt.show()"----------------------轉換成HSV space-------------------------------"
from skimage.color import rgb2hsv
I_hsv = rgb2hsv(I)
imshow(I_hsv)
"I原本shape"
I.shape()
"-----------------------直接讀取灰階圖---------------------------"
I_gray = imread(imgpath, as_gray=True)
"--------------------------彩色轉灰階--------------------------------"
from skimage.color import rgb2grayplt.figure(1)
plt.subplot(1,2,1)
plt.title("RGB")
imshow(I)
I_gray = rgb2gray(I)
plt.subplot(1,2,2)
plt.title("GRAY")
imshow(I)
imshow(I_gray)"-------------------------------更改尺寸&縮放-------------------------"
"--------------------------Resize----------------------------------"
from skimage.transform import resize
plt.figure(1)
plt.subplot(1,3,1)
plt.title("original image")
imshow(I)
I_resize = resize(I, (300,300))plt.subplot(1,3,2)
plt.title("Resize to 300x300")
imshow(I_resize)from skimage.transform import rotate
I_rotated = rotate(I, angle=89, resize=True)
plt.subplot(1,3,3)
plt.title("rotated angle=89")
imshow(I_rotated)
"-------------------------Rescale--------------"
from skimage.transform import rescale
I_rescale = rescale(I, scale=(0.5,0.5))
imshow(I_rescale)

原图

处理后成果