OpenCV半小時(shí)掌握基本操作之圖像裁剪融合

第OpenCV半小時(shí)掌握基本操作之圖像裁剪融合原圖:

例子:

#讀取數(shù)據(jù)

dog=cv2.imread("dog.jpg")

#拉伸比例1:3

dog_resize=cv2.resize(dog,(0,0),fx=1,fy=3)

cv2.imshow("dog_resize",dog_resize)

cv2.waitKey(0)

cv2.destroyAllWindows()

輸出結(jié)果:

數(shù)值計(jì)算

#讀取圖片

img1=cv2.imread("picture.jpg")

img2=cv2.imread("picture2.jpg")

img1=cv2.resize(img1,(382,383))#轉(zhuǎn)換成一樣大小

#調(diào)試輸出

print("image1:\n",img1[:5,:,0])

print("image2:\n",img2[:5,:,0])

#加10

img_new=img1+10

print("image_new:\n",img_new[:5,:,0])

#超過255的變成數(shù)值%256

img_add=img1+img2

print("image_add:\n",img_add[:5,:,0])

#超過255的變成255

img_add2=cv2.add(img1,img2)

print("image_add2:\n",img_add2[:5,:,0])

輸出結(jié)果:

image1:

[[206206206...206206206]

[208207208...207207208]

[208207208...208208208]

[209208209...209209209]

[209209209...209209209]]

image2:

[[187187187...223222222]

[187187187...224224223]

[187187187...225225224]

[187187187...225225225]

[187187187...223224225]]

image_new:

[[216216216...216216216]

[218217218...217217218]

[218217218...218218218]

[219218219...219219219]

[219219219...219219219]]

image_add:

[[137137137...173172172]

[139138139...175175175]

[139138139...177177176]

[140139140...178178178]

[140140140...176177178]]

image_add2:

[[255255255...255255255]

[255255255...255255255]

[255255255...255255255]

[255255255...255255255]

[255255255...255255255]]

圖像融合

cv2.addWeighted可以幫助我們?nèi)诤蟽蓮垐D片.

格式:

cv2.addWeighted(src1,alpha,src2,beta,gamma,dst=None,dtype=None)

例子:

#讀取數(shù)據(jù)

cat=cv2.imread("cat.jpg")

dog=cv2.imread("dog.jpg")

#輸出維度

print(cat.shape)#(554,640,3)

print(dog.shape)#(611,640,3)

#裁剪大小

dog=cv2.resize(dog,(640,554))

print(dog.shape)#(554,640,3)

#圖像融合

res=cv2.