Looking at a closest line match doesn't seem to work well, simply by factor of positioning of the drawings. I suspect they need to rotate the recognition object

Looking at a closest line match doesn't seem to work well, simply by factor of positioning of the drawings. I suspect they need to rotate the recognition objects around their axis, but even then, you're drawing 3d objects and using 2d recognition to detect them. (an airplane looks differently from its side than from its front). I drew a very clear to see pencil horizontally and it matched it to two horizontally drawn airplanes - one of which was supposed to be an aircraft carrier by the description. The existing pencils in its memory were positioned vertically when drawn, so no chance it would match them.