How to get the angle of a document page photo in Salesforce Apex

Determining the angle of rotation for a document can be quite difficult to achieve in Apex. The best means of accomplishing this is using machine learning to yield a high level of accuracy. You probably don’t have time for that whole process, so I will be showing you how to get this done in double quick time using an API.

First download this and drag the client folder into your project:

https://github.com/Cloudmersive/Cloudmersive.APIClient.Apex.OCR/archive/master.zip

Now we can call our function.

SwagPreprocessingApi api = new SwagPreprocessingApi();
SwagClient client = api.getClient();
// Configure API key authorization: Apikey
ApiKeyAuth Apikey = (ApiKeyAuth) client.getAuthentication('Apikey');
Apikey.setApiKey('YOUR API KEY');
Map<String, Object> params = new Map<String, Object>{
'imageFile' => Blob.valueOf('Sample text file\nContents')
};
try {
// cross your fingers
SwagGetPageAngleResult result = api.preprocessingGetPageAngle(params);
System.debug(result);
} catch (Swagger.ApiException e) {
// ...handle your exceptions
}

And you are officially done.