我有一個灰度圖。我想知道如何使用 Python 在導入的圖形中添加顏色條。我知道如何繪制二維數組并添加顏色條，但我不知道如何為導入的圖形執行類似的任務。我還想保留原始圖像的大小。我用導入圖from PIL import Image
im= Image.open("gray.png")提前致謝。
1 回答
holdtom
TA貢獻1805條經驗 獲得超10個贊
from mpl_toolkits.axes_grid1 import make_axes_locatable
import matplotlib.pyplot as plt
def display_image_in_actual_size(im_path):
dpi = 80
im_data = plt.imread(im_path)
height, width, depth = im_data.shape
# What size does the figure need to be in inches to fit the image?
figsize = width / float(dpi), height / float(dpi)
# Create a figure of the right size with one axes that takes up the full figure
fig = plt.figure(figsize=figsize)
ax = fig.add_axes([0, 0, 1, 1])
#ax.axis('off') # uncommenting this will result a plot without axis !
# configures size of colorbar
divider = make_axes_locatable(ax)
im=plt.imshow(im_data)
cax = divider.append_axes("right", size="5%", pad=0.05)
plt.colorbar(im, cax=cax)
ax.imshow(im_data, cmap='gray')
ax.set(xlim=[-10, width - 0.5], ylim=[height - 0.5, -0.5], aspect=1)
plt.savefig('last_image.png') #saving new image
plt.show()
display_image_in_actual_size("gray.png")
我已經從這里改編了部分答案
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