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ImageDataGenerator file formats #7904

Nqabz opened this Issue Sep 15, 2017 · 5 comments


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Nqabz commented Sep 15, 2017

Not a question but perhaps a suggestion that the file formats that are read, when using the image data augmentation module for example a direct read of file on a local directory with datagen.flow_from_directory(), are too specific and no useful message error is communicated back to the user if you happen to read files not included in the white_list_formats = {'png', 'jpg', 'jpeg', 'bmp', 'ppm'}. Is it possible to communicate a useful error message if the file format is not part of the list or perhps expose white_list_formats to be set outside the script.

Took me me few hours to figure out why the module wouldn't read my images in .tiff format. As you can see from the list above. 'tiff' is not one of the default file formats. Adding it to the list on line 969 in keras/preprocessing/ resolves the problem.


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russell0 commented Dec 11, 2017

It also works to change it to '.tif' -- thankfully for me!


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osamadel commented Feb 3, 2018

Well, thank you this actually worked for me. I had to add the 'tif' and 'tiff' file extensions to the white_list_formats in small letters and restart Spyder once, and run the code again to make it actually work.


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mmortazavi commented Feb 3, 2018

For some reasons simply adding them did not help! Finally I updated the keras from git branch, and ran the code again, worked just fine (that is why I deleted my original question because I thought it was perhaps quite obvious that I had to pull it from the main branch). Still wondering how it is possible for some like you simply adding "tif" to white_list_formats make it work.
Now keras preprocessing supports {'png', 'jpg', 'jpeg', 'bmp', 'ppm', 'tif', 'tiff'}, nice.


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benneely commented Apr 20, 2018

I'm interested in learning more about the purpose of white_list_formats. PILLOW will handle tifs and many other image formats. Since PIL support for image formats seems to be the rate limiting step, why not just limit to PIL's support of image formats?


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sarahndudgeon commented Sep 6, 2018

for me it was line 1188

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