I am currently writing a proposal for my research topic and I want to copy figures from published articles into my proposal document. To put it in perspective, almost all the copied figures are to go in the
Literature review section of the document.
Is it necessary to send an email to each and every author requesting permissions to copy the figures, even though complete citations and references are included? I referred to the following link:
MITLibraries: Reuse of content in thesis. From what it says, copying images in thesis (with correct citations) seems to be valid under US copyright law.