AzureCognitive is a package for working with Azure Cognitive Services. Both a Resource Manager interface and a client interface to the Cognitive Services REST API are provided. The aim is to provide a foundation that can be built on by other packages that will support specific services (Computer Vision, LUIS, etc).
AzureCognitive extends the class framework provided by AzureRMR to support Cognitive Services. You can create, retrieve, update, and delete cognitive service resources by calling the corresponding methods for a resource group.
az <- AzureRMR::get_azure_login() sub <- az$get_subscription("sub_id") rg <- sub$get_resource_group("rgname") # create a new Computer Vision service rg$create_cognitive_service("myvisionservice", service_type="ComputerVision", service_tier="S1") # retrieve it cogsvc <- rg$get_cognitive_service("myvisionservice") # list subscription keys cogsvc$list_keys()
AzureCognitive implements basic functionality for communicating with the Cognitive Services REST API. The main functions are cognitive_endpoint
, which creates an object representing the endpoint, and call_cognitive_endpoint
to perform the REST calls.
# getting the endpoint from the resource object endp <- cogsvc$get_endpoint() # or standalone (must provide subscription key or other means of authentication) endp <- cognitive_endpoint("https://myvisionservice.cognitiveservices.azure.com/", service_type="ComputerVision", key="key") # analyze an image img_link <- "https://news.microsoft.com/uploads/2014/09/billg1_print.jpg" call_cognitive_endpoint(endp, operation="analyze", body=list(url=img_link), options=list(details="celebrities"), http_verb="POST")
The latter call produces output like that below (truncated for brevity).
$categories $categories[[1]] $categories[[1]]$name [1] "people_" $categories[[1]]$score [1] 0.953125 $categories[[1]]$detail $categories[[1]]$detail$celebrities $categories[[1]]$detail$celebrities[[1]] $categories[[1]]$detail$celebrities[[1]]$name [1] "Bill Gates" $categories[[1]]$detail$celebrities[[1]]$confidence [1] 0.9999552
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