Lil Boosie -- I Was With My Kids on XMAS ... Pic is NOT Photoshopped

Lil Boosie is outraged people think he abandoned his kids on XMAS day and then had the audacity to deceive people into thinking they were with him courtesy of Photoshop.

Boosie posted the pic last week featuring 4-year-old Michael Jordan ... and a lot of people thought it just didn't look real.

We're told it was taken by a professional photog ... which is why the lighting looks better than normal. But Boosie insists the kid was front and center with him at his New Orleans digs. He says 6 of his other bambinos were there as well.