For extracting text from images of receipts in an Expense Report application, which API is appropriate?

The Vision API is the most suitable choice for extracting text from images of receipts in an Expense Report application because it is specifically designed for optical character recognition (OCR), which allows it to analyze images and extract textual information effectively. This capability is particularly beneficial when dealing with receipts where text may be structured or unstructured, and where varied fonts and layouts can be encountered.

The Vision API can process scanned documents and images, recognizing characters in multiple languages and adapting to different formats typically found in receipts. This makes it an ideal tool for automating the data extraction process needed for managing expenses.

In contrast, the Cloud Natural Language API focuses on understanding and analyzing text for tasks such as sentiment analysis or entity recognition, but it does not have the capability to derive text from images. The Video Intelligence API is specialized for video analysis, identifying objects and scenes in video files rather than dealing with image-based text extraction. The option indicating "None of the above" fails to recognize that the Vision API is indeed the correct and focused solution for the task described.