I noticed that https://github.com/luispedro/imread/issues/23 discussed uploading wheels.

Has that effort been stalled?I ask because imread is being used by scikit-image to test the imread backend. Installing imread from source sometimes breaks the build system.

We also had to create a special case for it since it did not have "wheels" so we couldn't recommend our users install it by default as a general "optional dependency".

Here is an example of a troublesome build https://travis-ci.org/scikit-image/scikit-image/jobs/530681267

First of all I want to thank you for developing the library, and especially the 16-bit PNG support. I think I've found a bug in it, though: It seems that saving 16-bit RGB data does not work properly. Only the first 5 columns in the generated file have the expected values, others contain some garbage. Note that 8-bit read/write and 16-bit read are working fine.

I'm running imread version 0.6 on 64-bit Ubuntu 14.04, tested on both Python 2.7.6 and 3.4.3.

I'm using the macport py27 versions of imread, mahotas, and numpy. When I load image_0011.jpg from the "ant" category of the Caltech 101 dataset, I receive the error

" in () ----> 1 image = mahotas.imread('/Users/*****/datasets/caltech101/data/ant/image_0011.jpg', as_grey=True)

/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/imread/imread.pyc in imread(filename, as_grey, formatstr) 50 # these are the values that wikipedia says are typical 51 transform = np.array([ 0.30, 0.59, 0.11]) ---> 52 return np.dot(im, transform) 53 return im 54

ValueError: objects are not aligned"

This particular image is already greyscale, so essentially, imread isn't checking to ensure that the image has three channels. I'm not sure if this is intended behaviour and isn't noted in the documentation, or the check wasn't implemented.

I am building imread from git master with msvc9 on win32-py2.7, linking statically against tiff-3.9.6, libpng-1.5.10, jpeg-8d, libwebp-0.1.3, and zlib-1.2.6. The link libraries all test OK. There are no warnings during build. Running setup.py test results in the following errors:

<snip>
imread.tests.test_error.test_error ... ok
imread.tests.test_imread.test_with_dot ... ERROR
imread.tests.test_imread.test_no_ext ... ok
imread.tests.test_imread.test_formatstr ... ERROR
imread.tests.test_jpeg.test_jpeg ... Corrupt JPEG data: 53 extraneous bytes before marker 0xc0
ok
imread.tests.test_jpeg.test_error ... ok
imread.tests.test_png.test_png_raw ... ERROR
imread.tests.test_png.test_asym ... ERROR
imread.tests.test_png.test_error ... ok
imread.tests.test_png.test_regression ... ERROR
imread.tests.test_tiff.test_read_back ... ERROR
imread.tests.test_tiff.test_error ... ok
imread.tests.test_tiff.test_monochrome ... ERROR
imread.tests.test_webp.test_error ... ok
imread.tests.test_xcf.test_xcf ... The process cannot access the file because it is being used by another process.
ERROR

======================================================================
ERROR: imread.tests.test_imread.test_with_dot
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_imread.py", line 7, in test_with_dot
    f = imread('./imread/tests/data/good.png')
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: Read Error

======================================================================
ERROR: imread.tests.test_imread.test_formatstr
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_imread.py", line 16, in test_formatstr
    f = imread('./imread/tests/data/good', formatstr='png')
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: Not a PNG file

======================================================================
ERROR: imread.tests.test_png.test_png_raw
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_png.py", line 21, in test_png_raw
    back = imread(_filename)
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: Read Error

======================================================================
ERROR: imread.tests.test_png.test_asym
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_png.py", line 29, in test_asym
    back = imread(_filename)
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: Read Error

======================================================================
ERROR: imread.tests.test_png.test_regression
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_png.py", line 38, in test_regression
    im = imread('imread/tests/data/palette_zero.png')
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: Read Error

======================================================================
ERROR: imread.tests.test_tiff.test_read_back
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_tiff.py", line 20, in test_read_back
    back = imread(_filename)
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: imread.imread._tiff: libtiff error: `internal: Read error at scanline 4294967295; got 16 bytes, expected 291`

======================================================================
ERROR: imread.tests.test_tiff.test_monochrome
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_tiff.py", line 28, in test_monochrome
    mono = imread('imread/tests/data/mono.tif')
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
RuntimeError: imread.imread._tiff: libtiff error: `internal: Can not read TIFF directory`

======================================================================
ERROR: imread.tests.test_xcf.test_xcf
----------------------------------------------------------------------
Traceback (most recent call last):
  File "X:\Python27\lib\site-packages\nose\case.py", line 197, in runTest
    self.test(*self.arg)
  File "imread-git\imread\tests\test_xcf.py", line 4, in test_xcf
    im = imread('imread/tests/data/diag.xcf')
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
  File "imread-git\imread\special.py", line 36, in readxcf
    return imread.imread(N.name)
  File "imread-git\imread\imread.py", line 45, in imread
    im = reader(filename, formatstr)
OSError: File does not exist

----------------------------------------------------------------------
Ran 15 tests in 0.065s

FAILED (errors=8)
Error in atexit._run_exitfuncs:
Traceback (most recent call last):
  File "X:\Python27\lib\atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "X:\Python27\lib\multiprocessing\util.py", line 284, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable
Error in sys.exitfunc:
Traceback (most recent call last):
  File "X:\Python27\lib\atexit.py", line 24, in _run_exitfuncs
    func(*targs, **kargs)
  File "X:\Python27\lib\multiprocessing\util.py", line 284, in _exit_function
    info('process shutting down')
TypeError: 'NoneType' object is not callable

Hi,

I just made a repository that will build Linux and OSX wheels for imread, here:

https://github.com/MacPython/imread-wheels

travis-ci builds the wheels:

https://travis-ci.org/MacPython/imread-wheels

and uploads them to:

https://3f23b170c54c2533c070-1c8a9b3114517dc5fe17b7c3f8c63a43.ssl.cf2.rackcdn.com

I've given @luispedro admin permission to the wheel building repo. The README at the top level of the repository should be self-explanatory.

Would you consider uploading the built wheels to pypi? I'm happy to do that if you like, I do that for quite a few other projects (numpy, scipy, matplotlib and so on).

Thanks for imread.

I'm trying to build the imread module using python3.4. I was able to build it using python2 (submitted to the Arch User repository here https://aur.archlinux.org/packages/python2-imread/). However using 3.4 I get the following errors:

building 'imread._imread' extension compiling C++ sources C compiler: g++ -pthread -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -fPIC

compile options: '-DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -DPY_ARRAY_UNIQUE_SYMBOL=MahotasImread_PyArray_API_Symbol -I/usr/local/include -I/usr/lib/python3.4/site-packages/numpy/core/include -I/usr/include/python3.4m -c' g++: imread/_imread.cpp In file included from /usr/include/python3.4m/pyatomic.h:8:0, from /usr/include/python3.4m/Python.h:53, from imread/lib/numpy.h:11, from imread/_imread.cpp:23: /usr/include/python3.4m/dynamic_annotations.h:472:3: error: template with C linkage template ^ In file included from /usr/include/python3.4m/pyatomic.h:8:0, from /usr/include/python3.4m/Python.h:53, from imread/lib/numpy.h:11, from imread/_imread.cpp:23: /usr/include/python3.4m/dynamic_annotations.h:472:3: error: template with C linkage template ^

error: Command "g++ -pthread -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -g -fwrapv -O3 -Wall -march=x86-64 -mtune=generic -O2 -pipe -fstack-protector-strong --param=ssp-buffer-size=4 -D_FORTIFY_SOURCE=2 -fPIC -DNPY_NO_DEPRECATED_API=NPY_1_7_API_VERSION -DPY_ARRAY_UNIQUE_SYMBOL=MahotasImread_PyArray_API_Symbol -I/usr/local/include -I/usr/lib/python3.4/site-packages/numpy/core/include -I/usr/include/python3.4m -c imread/_imread.cpp -o build/temp.linux-x86_64-3.4/imread/_imread.o" failed with exit status 1

Any idea where the error may come from? I hope this helps.

This image (which I hope uploads without change, MD5 = b655482e6c500210caca8950d6ce4bd9) loads in imread 0.3.1incorrectly. It looks right if I xor it with 255, but I don't think that's all that's wrong.

Hi. I was having errors building the latest imread sources on OSX from your repo's master:

https://gist.github.com/4023544#file_error_building_luispedro_source_with_pip.txt

Removing the two lines from setup.py that add zlib to the libraries install list on non-linux systems fixed it -- all the tests ran OK thereafter and the library performed as advertised:

https://gist.github.com/4023544#file_successful_install_build_ext_inplace_and_nosetests_run_with_patch_to_setup_file.txt

I am not sure if adding zlib explicitly is necessary for some other platform, or if indeed this is the way to go, but it was a solution on my end.

In scikit-image, we have failures with the latest version of imread. I haven't seen the issue here, so I report it.

https://travis-ci.org/github/scikit-image/scikit-image/jobs/667169692?utm_medium=notification&utm_source=github_status

Hi Luis,

thank you for creating this project! It will be very useful also for a number of other packages.

I get the following compile errors with Visual Studio 2008:

_imread.cpp
X:\imread-git\imread\lib/file.h(17) : error C2039: 'close' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(17) : error C3861: 'close': identifier not found
X:\imread-git\imread\lib/file.h(20) : error C2039: 'read' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(20) : error C2660: 'fd_source_sink::read' : function does not take 3 arguments
X:\imread-git\imread\lib/file.h(23) : error C2039: 'lseek' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(23) : error C3861: 'lseek': identifier not found
X:\imread-git\imread\lib/file.h(24) : error C2039: 'lseek' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(24) : error C3861: 'lseek': identifier not found
X:\imread-git\imread\lib/file.h(25) : error C2039: 'lseek' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(25) : error C3861: 'lseek': identifier not found
X:\imread-git\imread\lib/file.h(29) : error C2039: 'write' : is not a member of '`global namespace''
X:\imread-git\imread\lib/file.h(29) : error C2660: 'fd_source_sink::write' : function does not take 3 arguments
X:\imread-git\imread\lib/numpy.h(71) : warning C4530: C++ exception handler used, but unwind semantics are not enabled. Specify /EHsc
error: Command "C:\Program Files (x86)\Microsoft Visual Studio 9.0\VC\BIN\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG  -IX:\Python27\lib\site-packages\numpy\core\include -IX:\Python27\include -IX:\Python27\PC /Tpimread/_imread.cpp /Fobuild\
temp.win32-2.7\Release\imread/_imread.obj /Zm1000" failed with exit status 2

Hi, I wanted to read an 8bit png image with imread() function. But the loaded image has incorrectly 3 channels and also strange values in them. I'm using the package downloaded from http://www.lfd.uci.edu/~gohlke/pythonlibs/ (version for python 3.3 32bit). Could you please look at it and tell me if this is a bug or mistake at my side? Thanks.

This is more a question or feature request / idea rather than an issue.

If I am not mistaken it's currently not possible to write to a buffer or return the written bytes somehow right? What do you think about expanding the interface to support something like:

buf = BytesIO()
imsave(buf, my_fancy_array, formatstr='png')

If this is out of scope never mind. I am just curious.

I'm unsure what's wrong with this image, but imread.imread_multi() only returns one image. (As do several other python tiff wrappers).

https://drive.google.com/file/d/0Bx-14WwcXFgebmlLUGYwV1ZUc0E/view?usp=sharing

Sorry for the large size; I couldn't create a smaller test case.

tiffinfo reports: TIFF Directory at offset 0x8 (8) Subfile Type: (0 = 0x0) Image Width: 1024 Image Length: 544 Resolution: 0.307669, 0.307669 (unitless) Bits/Sample: 16 Compression Scheme: None Photometric Interpretation: min-is-black Samples/Pixel: 1 Rows/Strip: 544 Planar Configuration: single image plane ImageDescription: ImageJ=1.47u images=3997 frames=3997 unit=micron finterval=0.10010010004043579 loop=false min=1037.0 max=2281.0