This method applicable only adobe photoshop CC 2017, 2018 and latest version
With any image with text open got to Type > Match Font... This will open the Match Font window and you will see the selection box over the image.
Select your text with the match font selection box
Click-and-drag corner handles of the selection box so that it includes a single line of text. Select a single typeface and style. Don’t mix typefaces and styles inside the match font selection.
After you press OK Photoshop will select the font that you clicked on.