期末考模擬考題

import numpy as np import cv2 def num1(C1): img1=np.zeros((100,100,3)) cv2.line(img1, (50, 10), (50, 90), C1, 5) return img1 C=[[255,0,0], [0,255,0], [0,0,255]] img1=num1(C[0]) cv2.imwrite('number1.png',img1) cv2.imshow('img1',img1) cv2.waitKey(0) cv2.destroyAllWindows()

import numpy as np
import cv2

def num1(C1):
    img1=np.zeros((100,100,3))
    cv2.line(img1, (50, 10), (50, 90), C1, 5)
    return img1

C=[[255,0,0], [0,255,0], [0,0,255]]
img1=num1(C[0])
cv2.imwrite('number1.png',img1)
cv2.imshow('img1',img1)

img4=np.zeros((800,800,3),dtype=np.uint8)
img2=num1(C[1])
#img2=cv2.imread('number1.png')
img4[150:250,300:400,:]=img2[:,:,:]
img4[650:750,300:400,:]=img2[:,:,:]
cv2.imshow('img2',img2)
cv2.imshow('img4',img4)

cv2.waitKey(0)
cv2.destroyAllWindows()

參考程式

import numpy as np import cv2 L=800; Nx=20; LX=50 img4=np.zeros((L+LX,L+LX,3),dtype=np.uint8) print(img4.shape) for i in range(1,Nx): x=1/Nx*i y=np.sin(x*np.pi)*0.9 X=int(x*L); Y=L-int(y*L) if(i%2==0): th=-1 else: th=3 cv2.circle(img4,(X,Y), 15, (0, 125, 255), th) print(i,X,Y) cv2.imshow('img4',img4) cv2.imwrite('cicles_sine.png',img4) cv2.waitKey(0) cv2.destroyAllWindows()

參考程式

import matplotlib
import matplotlib.pyplot as plt
import numpy as np
import cv2
k=2*np.pi/2; b=5
x = np.linspace(0,10,20)
y = x**2
plt.plot(x,y,'g-', lw=10)
plt.plot(x,y,'rs',ms=10)
plt.savefig("matplot-1.png")
print ('plot is done')

img = cv2.imread('matplot-1.png')
imgM = cv2.resize(img, (400,300), interpolation=cv2.INTER_AREA)
img1=np.copy(imgM)
for i in range(300):
    print(i,img1[150][i][:])
Ly,Lx,c=img1.shape
for y in range(Ly):
    for x in range(Lx):
        if(np.sum(img1[y,x,:])==0): img1[y,x,:]=[255,255,255]
        if(img1[y,x,1:2] > img1[y,x,0:1] and img1[y,x,1:2] > img1[y,x,2:3]):
            img1[y,x,:]=[255,255,255]
        
cv2.imshow('imgM',imgM)
cv2.imshow('img1',img1)
cv2.waitKey(0)
cv2.destroyAllWindows()