correct typo

e4e6960a · youkaichao · 841d4d40 · e4e6960a
Commit e4e6960a authored Feb 10, 2019 by youkaichao
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docs/image.md docs/image.md +1 -2

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 ## Image
-This module provides some image processing methods, which requires `opencv` to
+This module provides some image processing methods, which requires `opencv` to be installed.
-to be installed.
 ### Read/Write/Show
 To read or write images files, use `imread` or `imwrite`.