当我通过python的PIL将.tif合并到RGB波段时出错

Question

from PIL import Image
band2 = Image.open('band2.tif')
band3 = Image.open('band3.tif')
band4 = Image.open('band4.tif')
img = Image.merge("RGB",(band4,band3,band2))

band2.tif，band3.tif，band4.tif在USGS（https://earthexplorer.usgs.gov/）下载。 与正常的.TIF

相比，它们可能有一些不同

错误信息

/usr/bin/python3.5 /home/lixingang/workspace/20170405/main.py
Traceback (most recent call last):
  File "/home/lixingang/workspace/20170405/main.py", line 5, in <module>
    img = Image.merge("RGB",(band4,band3,band2))
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 2388, in merge
    raise ValueError("mode mismatch")
ValueError: mode mismatch

Process finished with exit code 1

Answer 1

您需要将每个频道转换为亮度频道。所以不要这样：

band2 = Image.open('band2.tif')

你需要这样做：

band2 = Image.open('band2.tif').convert('L')

与其他渠道相同，对于合并订单也应予以考虑。