Powershell script that runs photos (default jpg) in current folder through Microsoft's Cognitive Services Vision API and rotates the photo to match the orientation that MSCSVapi has the most confidence in its caption of.

msVisionAPIphotoRotate.ps1

param(
    [string]$ext = "jpg"
)

# Powershell script that runs photos (default jpg) in current folder through
# Microsoft's Cognitive Services Vision API and rotates the photo
# to match the orientation that MSCSVapi has the most confidence in its caption of.

New-Item -ItemType directory -Path $PSScriptRoot/temp -Force
function callMsAPI {
    $imagePath = "$PSScriptRoot\temp\testimage-$i.jpg"
    $Uri = 'https://westus.api.cognitive.microsoft.com/vision/v1.0/analyze?visualFeatures=Description' # make sure your endpoint matches you key
    $Headers = @{
        'Ocp-Apim-Subscription-Key' = '<Subscription-Key>' #replace with yours
    }
    $Response = Invoke-RestMethod -Uri $Uri -Method Post -InFile $imagePath -Headers $Headers -ContentType 'application/octet-stream'
    return $Response.description.captions.confidence
}

Get-ChildItem $PSScriptRoot -Filter *.$ext |
    ForEach-Object {
    $i = 0
    $highScore = 0
    $testSCore = 0
    [int]$bestRot
    for ($i = 0; $i -le 270; $i = $i + 90) {
        $out = "$PSScriptRoot\temp\testimage-$i.jpg"
        if ($i -eq 0) {
            cmd /c "magick.exe $PSScriptRoot\$_ -resize 20% $out"
        }
        else {
            cmd /c "magick.exe $PSScriptRoot\temp\testimage-0.jpg -rotate $i $out"
        }
        Write-Host -NoNewline "sending $_.BaseName rotated $i degrees as testimage-$i.jpg to callMsAPI for analysis..."
        $testScore = callMsAPI($i)
        Write-Host "score: $testScore"
        if ($testScore -gt $highScore) {
            $highScore = $testScore
            $bestRot = $i
        }
        # Sleep for 3 seconds as to not breech Microsoft's Free Tier rate limit. 3 might be overkill.
        # Allowed 20/min.
        Start-Sleep 3
    }
    if ($bestRot -eq 0) {
        Write-Host -ForegroundColor Green "$_ is already rightside up"
    }
    else {
        Write-Host -ForegroundColor Yellow " a rotation of $bestRot degrees scored highest for $_ - rotating..."
        cmd /c "magick.exe $_ -rotate $bestRot $_"
    }

    Remove-Item temp -Recurse -Force
}