Qtr-8rc, qtr-8a

I have a project in mind using one of the above sensors as a line detecting sensor in an environment where there may be different colors and textures to be detected to define whether the line is where it needs to be or if the products making the line needs to be moved to the left or right to be in line with the desired point as it is moved forward. this is an edge guide system using the same technology as a line following system. Before I get too far, I am asking if either of these sensors have been utilized in this fashion by anyone else.

Thanks for your assistance.