One German photographer, Franz Roth, was described in the review as “an ardent Nazi” who was employed on staff and sometimes as a freelancer.

Beginning in 1942, Germany sent censored photos from Germany and German-occupied Europe to Associated Press offices in New York and London in exchange for agency photos from the United States, the report revealed. The arrangement was approved by United States officials, the review said, and Associated Press management considered the photos from Germany crucial in covering the war. The photos were reviewed by censors in either the United States or Britain.

“Although the exchange necessitated dealing with the Nazi regime, it was The A.P.’s belief then and now that the photos gave the U.S. public a much fuller picture of the war than could have been obtained otherwise,” the report said.

The Associated Press said it worked to keep its photo service objective and free of propaganda, at times clashing with Nazi censors. Louis P. Lochner, the agency’s Berlin bureau chief, won the Pulitzer Prize in 1939.

“Viewed from the perspective of more than 80 years’ hindsight, The A.P. in the totality of its conduct fulfilled its mission to gather the news in Germany forthrightly and as independently as possible for the benefit of its audience and for the benefit of the truth,” the report said. “Due in large part to The A.P.’s aggressive reporting, the dangers of the Nazis’ ambitions for domination in Europe and their brutal treatment of its opponents were revealed to the wider world.”

In a statement on Thursday, Ms. Scharnberg lauded the effort by The Associated Press to address the issue, but said the results of her research were not disproved by the review. As an example, Mr. Roth was in Lemberg, Ukraine, when about 5,000 Jews were killed, but his photography wouldn’t have shown it, she said.

“Instead of covering the violent purge and the Jewish victims, he photographed soviet P.O.W.s, captured tanks and the happy Lemberg people, cheering at the German invaders,” she wrote. “Even American newspaper readers were able to look at these pictures as they passed German censorship and were distributed by A.P. in the U.S. American readers looked at them assuming that their newspaper supported by A.P. would present the most important events in and around Lemberg.”

“Given his example, it is possible to outline the extensive consequences of this photojournalistic agreement,” she said.