1. A method comprising: projecting, from a projector, coherent illumination on an object; capturing, with a first camera in a particular location, a reference image of the object while the diffused laser is projected on the object; capturing, with a second camera positioned in the particular location, a test image of the object while the coherent illumination is projected on the object; and comparing speckles in the reference image to the test image; wherein the projector, first camera and second camera are removably provided to and positioned in a site of the object.