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                ??一站式輕松地調用各大LLM模型接口,支持GPT4、智譜、豆包、星火、月之暗面及文生圖、文生視頻 廣告
                使用工具Python3.5, 使用庫numpy;opencv, 從圖片的導入到另存, 1. cv2.imread(文件名,標記)讀入圖像, * cv2.IMREAD_COLOR():讀入彩色圖像 * cv2.IMREAD_GRAYSCALE():以灰度模式讀入圖像 ``import numpy as np import cv2 img = cv2.imread('45.jpg',0) `` 2.cv2.imshow()顯示圖像, * cv2.waitKey()等待鍵盤輸入,為毫秒級 * cv2.destroyAllWindows()可以輕易刪除任何我們建立的窗口,括號內輸入想刪除的窗口名 ![](https://box.kancloud.cn/691a8db1307845e260df181db45e8103_526x149.jpg) ~~~ cv2.namedWindow('image',cv2.WINDOW_NORMAL) cv2.imshow('image',img) cv2.waitKey(0) cv2.destroyAllWindows() ~~~ 3.cv2.imwrite(文件名,img)保存圖像, ~~~ cv2.imwrite('messigray.png',img) ~~~ 4.練習加載一個灰度圖,顯示圖片,按下‘s’鍵保存后退出,或者按下ESC鍵退出不保存 ~~~ import numpy as np import cv2 img = cv2.imread('45.jpg',0) cv2.imshow('image',img) k = cv2.waitKey(0) if k==27: cv2.destroyAllWindows() #wait for ESC key to exit elif k == ord('s'): cv2.imwrite('46.png',img) #wait for 's' key to save and exit cv2.destoryAllWindows() ~~~ 如果用的是64位系統,需將key=cv2.waitKey(0)改為k=cv2.waitKey(0)&0xFF @!! 5.Matplotlib是牛X的繪圖庫,先簡單介紹顯示圖像 ~~~ import numpy as np import cv2 from matplotlib import pyplot as plt img =cv2.imread('45.jpg',0) plt.imshow(img,cmap='gray',interpolation = 'bicubic') plt.xticks([]),plt.yticks([]) #to hide tick values on X and Y axis plt.show() ~~~
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