In [http://docs.opencv.org/3.1.0/d7/d4d/tutorial_py_thresholding.html#gsc.tab=0](http://docs.opencv.org/3.1.0/d7/d4d/tutorial_py_thresholding.html#gsc.tab=0), we can see a very good demo about Image adaptive thresholding.
But in OpenCV repository(opencv/sources/samples/data) I cannot find dave.jpg. Where is it ?
Thanks
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