2. The computer-implemented method of claim 1 , comprising: receiving, by the input-to-text engine, input; generating, by the input-to-text engine, text based on the received input; and wherein determining the confidence value that reflects the input-to-text engine's confidence that text associated with the text object accurately represents an input comprises determining a confidence value that reflects the input-to-text engine's confidence that the generated text accurately represents the received input.
3. The computer-implemented method of claim 2 , wherein: receiving, by the input-to-text engine, input comprises receiving, by the input-to-text engine, at least one image of a document; and determining the confidence value that reflects the input-to-text engine's confidence that the generated text accurately represents the received input comprises determining a confidence value that reflects the input-to-text engine's confidence that the generated text accurately represents one or more textual characters included in the document.