小编Tig*_*igs的帖子

没有白色边框和初始分辨率(1037x627)我无法保存图像

import numpy as np
import matplotlib.pyplot as plt
from matplotlib import pyplot, lines
import matplotlib.image as mpimg
from matplotlib.patches import Ellipse
x=[0,0,0,0,0]
y=[0,0,0,0,0]
a=10**1.3*15
inc=25
b=np.cos(np.radians(inc))*a
x[0],y[0]=516.667,313.021
x[1],y[1]=x[0]-a,y[0]
x[2],y[2]=x[0]+a,y[0]
x[3],y[3]=x[0],y[0]+b
x[4],y[4]=x[0],y[0]-b
for pa in range(0,10,5):
    fig, ax = plt.subplots()
    img=mpimg.imread('IC342.png')
    imgplot = plt.imshow(img)
    x[1],y[1]=x[0]-a/2*np.cos(np.radians(pa)),y[0]-a/2*np.sin(np.radians(pa))
    x[2],y[2]=x[0]+a/2*np.cos(np.radians(pa)),y[0]+a/2*np.sin(np.radians(pa))
    x[3],y[3]=x[0]+b/2*np.cos(np.radians(pa+90)),y[0]+b/2*np.sin(np.radians(pa+90))
    x[4],y[4]=x[0]-b/2*np.cos(np.radians(pa+90)),y[0]-b/2*np.sin(np.radians(pa+90))
    ell = Ellipse(xy=[516.667,313.021], width=a, height=b, angle=pa, edgecolor='b',lw=4, alpha=0.5, facecolor='none')
    name='plt'+str(pa)+'.png'
    leg='PA='+str(pa)
    #ax.text(10, 10, leg, fontsize=15,color='white')
    ax.add_artist(ell)
    xn=[x[1],x[2],x[0]]
    yn=[y[1],y[2],y[0]]
    xnw=[x[3],x[4],x[0]]
    ynw=[y[3],y[4],y[0]]
    line = lines.Line2D(xn, yn, linestyle='-.',lw=5., color='r', alpha=0.4)
    line1 = lines.Line2D(xnw, …

我真的无法得到这个,我需要在图像上叠加一个椭圆.问题是使用matplotlib.patches绘制椭圆,但最后是白色图形或填充椭圆.代码很原始,我不知道该怎么做,因为我从来没有使用matplotlib库的这一部分.

import matplotlib.pyplot as plt
import numpy.random as rnd
from matplotlib.patches import Ellipse


ells = [Ellipse(xy=[0,0], width=30, height=10, angle=0,edgecolor='b', lw=4)]

fig = plt.figure(0)
ax = fig.add_subplot(111, aspect='equal')
for e in ells:
    ax.add_artist(e)
    e.set_alpha(1)
    e.set_facecolor(none) #obvious mistake, but no idea what to do

ax.set_xlim(-100, 100)
ax.set_ylim(-100, 100)

plt.show()

我试着查找matplotlib.patches页面,但没有关于如何绘制椭圆的明确信息,只是正在使用的函数.

非常感谢一些帮助.

感谢您的时间.