我尝试阅读并平铺一个jp2图像文件。该图像是RGB 98176 x 80656像素(它是医学图像数据)。
使用glymur尝试读取图像时,我会收到以下错误:
glymur.lib.openjp2.OpenJPEGLibraryError: OpenJPEG library error: Prevent buffer overflow (x1: 80656, y1: 98176)
我知道这张图片太大了。我需要按瓦片读取图像数据并将其保存在其他地方和另一种格式中。
Glymur允许我使用Python读取头文件,因此例如,代码流为:
>>> print(codestream.segment[1])
SIZ marker segment @ (87, 47)
Profile: no profile
Reference Grid Height, Width: (98176 x 80656)
Vertical, Horizontal Reference Grid Offset: (0 x 0)
Reference Tile Height, Width: (832 x 1136)
Vertical, Horizontal Reference Tile Offset: (0 x 0)
Bitdepth: (8, 8, 8)
Signed: (False, False, False)
Vertical, Horizontal Subsampling: ((1, 1), (1, 1), (1, 1))
瓷砖无法使用,read方法不起作用。
编辑: 我还尝试了Scipy,它能够读取标头,但是出现了相同的错误:
>>> import scipy.misc
>>> image=scipy.misc.imread('Sl0.jp2')
/home/user/anaconda2/lib/python2.7/site-packages/PIL/Image.py:2274: DecompressionBombWarning: Image size (7717166080 pixels) exceeds limit of 89478485 pixels, could be decompression bomb DOS attack.
DecompressionBombWarning)
>>> scipy.misc.imwrite('/home/user/Documents/imageCfromjp2.tif',image)
/home/user/
AttributeError: 'module' object has no attribute 'imwrite'
>>> scipy.misc.imsave('/home/user/Documents/imageCfromjp2.tif',image)
/home/user/
File "/home/user/anaconda2/lib/python2.7/site-packages/scipy/misc/pilutil.py", line 195, in imsave
im = toimage(arr, channel_axis=2)
File "/home/user/anaconda2/lib/python2.7/site-packages/scipy/misc/pilutil.py", line 287, in toimage
raise ValueError("'arr' does not have a suitable array shape for "
ValueError: 'arr' does not have a suitable array shape for any mode.
>>> image2=image[0:500,0:500]
/home/user/
IndexError: too many indices for array
>>> image2=image[0:500]
/home/user/
ValueError: cannot slice a 0-d array
有没有办法将图像数据流到不同类型的容器中,以便索引号不成问题,并使我能够处理它?