labelme闪退的可能原因之一_labelme闪退什么原因

用labelme.exe打开一个有好几张图的文件夹的时候，可能会闪退。但是也看不到是什么错误，没有弹窗错误提示。

这个时候，可以从命令行打开exe文件，或者用python的pip安装labelme。从命令行启动labelme之后，再次打开图像文件夹。还是会闪退，但是能看到报错了。

Traceback (most recent call last):
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\PIL\JpegImagePlugin.py", line 630, in _save
    rawmode = RAWMODE[im.mode]
KeyError: 'RGBA'
 
The above exception was the direct cause of the following exception:
 
Traceback (most recent call last):
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\labelme\app.py", line 1110, in fileSelectionChanged
    self.loadFile(filename)
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\labelme\app.py", line 1510, in loadFile
    self.imageData = LabelFile.load_image_file(filename)
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\labelme\label_file.py", line 66, in load_image_file
    image_pil.save(f, format=format)
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\PIL\Image.py", line 2212, in save
    save_handler(self, fp, filename)
  File "d:\Users\qqyor\anaconda3\envs\py37\lib\site-packages\PIL\JpegImagePlugin.py", line 632, in _save
    raise OSError(f"cannot write mode {im.mode} as JPEG") from e
OSError: cannot write mode RGBA as JPEG

原因是图像是rgba四个通道的，第四个通道是透明通道。

把图片转换一下成三通道的图像试试，一般可以解决。