Blasting is a commonly utilized method in mining and tunneling to break rock mass with explosives. Even with its efficiency, it still has undesired effects, such as damage to the remaining rock mass. Reducing the damaged volume plays an important role in the structure safety, stability, and longevity of mining and civil engineering infrastructures. The length and number of cracks in the tunnel walls and roof usually characterize the quantification of the damage induced to the rock by blasting. This paper describes how non-contact visual-based techniques in small-scale experiments can be used to measure blast-induced damage in rock-like material. The experimental configuration was based on concrete/magnetite cylindrical specimens. Every sample has a borehole at its center. The blast-induced damage is dependent on several parameters, such as the explosive parameters, blast design, and rock mass properties. This study focuses on the blast design parameters and, more specifically, the decoupling ratio. The borehole in the sample varied in diameter based on the detonation cord diameter. The measurement equipment was composed of an ultrahigh-speed camera and flicker-free powerful LED lights to provide enough luminosity for the measurements. The samples were prepared in a controlled environment with speckles for the digital image correlation (DIC) technique. The testing and calibration of the equipment were performed at the laboratory, where the conditions were well-controlled. After the calibration, a series of trials were performed to evaluate the equipment’s performance. The results from these trials were very promising, and the developed method provided reliable data for further analysis. The post-processing analysis was performed with image processing software to prepare the images for the Digital Image Correlation engine (DICe). DICe was used to track the cracks and to virtually measure the strains on the sample’s surface. The next steps are to perform a series of tests with well-defined decoupling ratios and implement the methodology developed based on the above-mentioned trials.