Batman Begins primarily reflects the early years of the Post-Crisis Batman's career, taking many of its cues from Frank Miller and David Mazzucchelli's Batman: Year One (1987) and the first few story arcs published in Legends of the Dark Knight Volume 1 (1989-2007).
Responsibility for ensuring adherence to the comics fell largely upon David Goyer, who co-wrote the script with Christopher Nolan.
"Chris had never read comic books. He didn't know the world. So he trusted me on that franchise and with Superman to know what was canon: what could be changed and what couldn't be changed."
David Goyer speaking with Indiewire.com
A few of Goyer’s comic influences were listed in a 2004 MTV article:
Goyer knew immediately which Batmans he wanted to reference. Consider it his Batman canon: Frank Miller’s noir take on Batman’s early career in “Year One,” Jeph Loeb’s “The Long Halloween” and its sequel, “Dark Victory” (which was written with Tim Sale), and Denny O’Neil and Neal Adams’ 1970s work, which introduced the villain Ra’s al Ghul.
‘The Man Who Falls’ (Secret Origins of the World’s Greatest Super-Heroes, 1989) was cited as a structural influence on the film during the Genesis of the Bat DVD documentary. This story was reprinted in the Batman Begins tie-in graphic novel which was included with the DVD release, along with the first chapter of Jeph Loeb and Tim Sale’s Batman: The Long Halloween (1996-1997).
Did Scott McDaniel’s cover art for Batman Vol 1 #600 (April 2002) inspire the poster?
The following analysis highlights the numerous similarities between Nolan’s first Batman film and the comics that inspired it. Many of these elements were consciously adapted from the source material, while other parallels are more likely coincidental. But whether they were deliberate or not, we’re noting as many as we can find.