在Matplotlib / Python中将小照片/图像添加到大图中

时间:2010-06-09 04:34:27

标签: python matplotlib

我有一个我在matplotlib中生成的大图。我想在某个(x,y)坐标处为此图添加一些图标。我想知道在matplotlib中是否有任何方法可以做到这一点

谢谢

3 个答案:

答案 0 :(得分:6)

这绝对有可能。这是一个开始:

import matplotlib, scipy
fig = matplotlib.figure()
ax = fig.add_axes([0.1,0.1,0.8,0.8])
axicon = fig.add_axes([0.4,0.4,0.1,0.1])
ax.plot(range(5), [4,2,3,5,1])
axicon.imshow(scipy.randn(100,100))
axicon.set_xticks([])
axicon.set_yticks([])
fig.show()

Icon overlap http://up.stevetjoa.com/iconoverlap.png

在此示例中,图标的位置未根据图的(x,y)坐标定义;也许别人可以帮忙。不过,我希望这个例子很有帮助。

答案 1 :(得分:1)

请参阅dolphin example - 最初a joke,但它会显示如何在不同坐标的地块中添加矢量图形。

答案 2 :(得分:1)

晚了许多年,但供将来参考 我发现在其中添加AnnotationBbox并添加了OffsetImage,这对我来说很有用。 e.g。

#!/usr/bin/env python
import matplotlib
matplotlib.use('WXAgg')
import matplotlib.pyplot as plt
from matplotlib.offsetbox import (OffsetImage,AnnotationBbox)
from matplotlib.cbook import get_sample_data
# The slices will be ordered and plotted counter-clockwise.
labels = 'Frogs', 'Hogs', 'Dogs', 'Logs'
sizes = [15, 30, 45, 10]
colors = ['yellowgreen', 'gold', 'lightskyblue', 'lightcoral']
explode = (0.1, 0, 0, 0)  # explode a slice if required
fig, ax = plt.subplots()
ax.pie(sizes, explode=explode, labels=labels, colors=colors,
        autopct='%1.1f%%', shadow=True)
#Full path name to your image
fn = get_sample_data("/home/rolf/bandwidth/bandwidth.png", asfileobj=False)
arr_img = plt.imread(fn, format='png')

imagebox = OffsetImage(arr_img, zoom=1.2)
imagebox.image.axes = ax
xy = [0.75, 0.95]
ab = AnnotationBbox(imagebox, xy,
                    xybox=(120., -10.),
                    xycoords='data',
                    boxcoords="offset points",
                    pad=0.5,
                    )
ax.add_artist(ab)

# Set aspect ratio to be equal so that pie is drawn as a circle.
plt.axis('equal')
plt.show()

使用xyxybox值在图中移动图像。

进一步阅读可能有用:
http://matplotlib.org/examples/pylab_examples/demo_annotation_box.html https://developer.ibm.com/clouddataservices/2016/10/06/your-own-weather-forecast-in-a-python-notebook/