You can use shape feature of Tableau which enable you to add image.
tableau doesn't support datatype as image for the column. Thus we need to take the column as a string and put in the shape shelf so that we can insert the images in tableau.
Adding custom shapes in Tableau is very easy!
Check out the following tableau article on the subject: Shape
In short determine the unique identifier of each picture and then use this to decide which shape (image) is assigned to each unique identifier inside of Tableau.