IANAL but my guess that the output seems likely to be considered a "derivative work" (referring to US law in this case). So you'd need prior authorization from the copyright holder in the absence of a license.
"Only the owner of copyright in a work has the right to prepare, or to authorize someone else to create, an adaptation of that work. The owner of a copyright is generally the author or someone who has obtained the exclusive rights from the author... The unauthorized adaptation of a work may constitute copyright infringement." [1]
Some of the examples they give in the referenced document above are pretty close to what this tool outputs. e.g. "A new version of an existing computer program", "A revision of a website", "A drawing based on a photograph", etc