The player missed two months of the campaign after manager Mick McCarthy lost patience with the former Arsenal trainee's attitude during an Under-21 game against Charlton.
Emmanuel-Thomas, 22, has since returned to McCarthy's line-up but admits he has not yet won over all of the Portman Road fans.
He told the East Anglian Daily Times: "My head was in a bad place during the Charlton game.
"I played in the game and I scored but it did not really mean anything.
"I had a conversation with Mick McCarthy and I apologised and since then I have been getting back to the levels I was at before."
He added: "I am like Marmite, and the fans either like me or they don't, but that doesn't faze me."