Determination of reflection photoelasticity fringes analysis with digital image-discrete processing

Combining digital RGB image-discrete processing technique (DIDP) and the Tardy method with null-balance compensator (NBC) to extract the reflection photoelastic fringe orders is presented and demonstrated. A new full-field approach for the automatic photoelastic analysis of isochromatic fringes in white light is proposed. The results agree well with the values obtained from the finite element method.