当我试图对原始数据进行JPEG解压缩(旧式JPEG压缩,而不是JPEG-LS和JPEG2000)时,我得到以下错误:
Traceback (most recent call last):
File "raw-reader.py", line 766, in <module>
raw_image_data = imageio.imread(io.BytesIO(raw_packed_image_data))
File "/home/ian/.local/lib/python3.6/site-packages/imageio/core/functions.py", line 206, in imread
reader = read(uri, format, 'i', **kwargs)
File "/home/ian/.local/lib/python3.6/site-packages/imageio/core/functions.py", line 129, in get_reader
return format.get_reader(request)
File "/home/ian/.local/lib/python3.6/site-packages/imageio/core/format.py", line 168, in get_reader
return self.Reader(self, request)
File "/home/ian/.local/lib/python3.6/site-packages/imageio/core/format.py", line 217, in __init__
self._open(**self.request.kwargs.copy())
File "/home/ian/.local/lib/python3.6/site-packages/imageio/plugins/pillow.py", line 398, in _open
pilmode=pilmode, as_gray=as_gray)
File "/home/ian/.local/lib/python3.6/site-packages/imageio/plugins/pillow.py", line 122, in _open
self._im = factory(self._fp, '')
File "/home/ian/.local/lib/python3.6/site-packages/PIL/JpegImagePlugin.py", line 780, in jpeg_factory
im = JpegImageFile(fp, filename)
File "/home/ian/.local/lib/python3.6/site-packages/PIL/ImageFile.py", line 102, in __init__
self._open()
File "/home/ian/.local/lib/python3.6/site-packages/PIL/JpegImagePlugin.py", line 339, in _open
handler(self, i)
File "/home/ian/.local/lib/python3.6/site-packages/PIL/JpegImagePlugin.py", line 166, in SOF
raise SyntaxError("cannot handle %d-bit layers" % self.bits)
SyntaxError: cannot handle 14-bit layers
图像中的原始数据是14位JPEG数据,imageio无法读取。当我尝试使用pillow时,它甚至没有识别出JPEG格式的数据。我现在的问题是:如何在不编写自己的JPEG解压器的情况下解压数据,同时记住数据是14位的?在
我的代码:
^{pr2}$文件raw_data.dat
是一个纯粹包含用JPEG压缩的原始图像数据的文件。链接到raw_data.dat
raw_data.dat
是一个JPEG Lossless, Nonhierarchical
文件,有2个帧和一个8位精度,这是一种非常罕见的格式。在imagecodecs包可以读取文件(假设
_imagecodecs
Cython扩展名存在):LEADTOOLS SDK还应能够读取文件(未测试)。在
我相信这个问题可以通过使用不同的库来加载图像来解决。类似的潜在问题也被贴在这里How to combine 3 high range JPEG2000 images into single RGB one?。您可以使用以下方法:
然后,您可以使用读取位图进行进一步的操作,就好像它是通过PIL/Pillow/imageio加载的一样。在
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