This study proposes a simple and effective method for generating digital speckle patterns. Speckle coordinates are generated based on pixel occupancy, which in turn produces densely distributed Gaussian speckles. A systematic discussion of speckle parameters is provided, and the analysis indicates that the optimal expected minimum speckle distance is 5 pixel, while the optimal speckle radius is 2 pixel. A comparison is made between four speckle patterns generated by different methods. Numerical simulations show that the proposed method helps reduce systematic and random errors and is better suited for smaller subsets. The applicability of the proposed method in different scenarios is verified through rigid-body translation experiments and specular surface shape measurement experiments.