Table 2.

Sample preparation with varying particles, substrates, and processes for generating heterogeneous images.

Sample	Particle	Substrate and Roughness value	Imaging	Sample Image
A	Nicrobraz LM, Spherical Shape	AISI 1006 Mild Steel Rod ${(R}_a=0.26\mu \mathrm{m})$	Full Ring lighting
B	Nicrobraz LM, Spherical Shape	AISI 1006 Mild Steel Rod ${(R}_a=0.26\mu \mathrm{m})$	Co-axial lighting
C	Nicrobraz LM, Spherical Shape	AISI 306 Stainless Steel Rod ${(R}_a=0.37\mu \mathrm{m})$	Co-axial lighting
D	Alumina, Irregular Shape	Tungsten (W) Rod ${(R}_a=0.19\mu \mathrm{m})$	Full Ring lighting
E	Nicrobraz LM, Spherical Shape	Titanium Rod used in TIG welding ${(R}_a=2.14\mu \mathrm{m})$	Full Ring lighting