Predicting the functionality of an engineering component is possible by the evaluating of roughness of the machined surface. Researchers have been proposing different approaches for the measurement of surface roughness. Highest accuracy in roughness measurement is possible by Contact type measurement. Non-contact type of roughness measurement is fast but do not provide complete information for the complete surface characterization. These techniques fail to measure the roughness of complicated objects.  In this scenario, present method becomes very important. Vision system is used for the roughness evaluation. The present method is capable of measuring the surface finish of EDM components and also highest measuring speeds are possible.