Add a helper function to check for low contrast
Add a check for low contrast when using imsave
Use the low contrast helper in imshow and make sure warnings are always shown
Clean up parameter names and add doctests
Remove unnecessary warning context
Remove unnecessary warning context
Add dtype ranges for 64bit types
Update tests with new warnings
Fix doctest logic
Fix doctest logic
Add a low contrast test with multiple dtypes
Fix check for color images
Fix color check again
Add support for int32 types
Relax assertion for 32bit builds
Add a low contrast test with multiple dtypes
Add a low contrast test with multiple dtypes
Fix check for color images
Fix color check again
Add support for int32 types
`equalize_hist`: "max_intensity" parameter no longer exists---img_as_float normalizes intensity range
`cumulative_distribution`: Return centers of bins instead of the edges.
Move `histogram` function from filter subpackage.
Add test of equalize_hist
Add example of histogram equalization.
Steven Silvester