This API supports the ability to upload image file formats such as png, jpg and tiff via the Tesseract nuget package.
You will need to obtain one or more tessdata language data files such as eng.traineddata and add them to your ./data directory or the location specified in the Tesseract.FilePath location in ./appsettings.json.

If you do not add any .traineddata files, you will receive a runtime exception when attempting to upload one of these image formats.