gocv-annotate-image-binay.ps1

# Analyze image by URL with Google Cloud Vision API in PowerShell

$CloudVisionAPIURL = "https://vision.googleapis.com/v1/images:annotate";
$CloudVisionAPIKey = "YOUR_KEY_GOES_HERE";
$CloudVisionAPIAnalyzeTemplateURL = ($CloudVisionAPIURL + "?key={0}")

$ImageFilename = "C:\Temp\cognitive\20180805-120348-GH01C04-S00.jpg";

# Note: the aspect ratios for crop hints are 1:1, 4:3, 3:2 and 16:9
$AnnotateImageRequest =
@{
    requests = @{
        image = @{
            content = ([Convert]::ToBase64String([IO.File]::ReadAllBytes($ImageFilename)))
        }
        features = @{type = "FACE_DETECTION"} `
                    , @{type = "LANDMARK_DETECTION" } `
                    , @{type = "LOGO_DETECTION" } `
                    , @{type = "LABEL_DETECTION" } `
                    , @{type = "SAFE_SEARCH_DETECTION" } `
                    , @{type = "IMAGE_PROPERTIES" } `
                    , @{type = "CROP_HINTS" } `
                    , @{type = "WEB_DETECTION"; maxResults = 5}
        imageContext = @{
            cropHintsParams = @{ aspectRatios = 1, 1.33333, 1.5, 1.77777 }
            webDetectionParams = @{ includeGeoResults = "true" }
        }
    }
};

$JSonAnnotateImageRequest = (ConvertTo-Json $AnnotateImageRequest -Depth 10) 

$Response = Invoke-WebRequest `
    -Uri ($CloudVisionAPIAnalyzeTemplateURL -f $CloudVisionAPIKey) `
    -Body $JSonAnnotateImageRequest `
    -ContentType "application/json" `
    -Method "Post" `
    -ErrorAction Stop `
    -UseBasicParsing;
    
$Response.Content | Out-File ([System.IO.Path]::ChangeExtension($ImageFilename, "annotate.json")) -Encoding UTF8;