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Initializes the authorization credentials for the 'Google Vision' API. Needs to be called before using any other functions of imgrec and requires gvision_key as environment variable.
imgrec
gvision_key
gvision_init()
nothing.
# NOT RUN { Sys.setenv(gvision_key = "Your Google Vision API key") gvision_init() # } # NOT RUN { # }
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