The evaluation of camouflage effect can be efficiently completed through computer digital image processing. The decorative pieces on the camouflage net can effectively ameliorate the camouflage effect of camouflage net. In an effort to evaluate the camouflage effect of decorative pieces on the camouflage net, our research group organized experiments for research. This study used decorative pieces with different edge shapes, and determined the type of camouflage net used in the background through color extraction. The study compared the performance differences of camouflage before and after adding decorative pieces to obtain the research results based on computer image processing. As the research results clearly reveal, decorative pieces on the camouflage net can effectively heighten the effectiveness of camouflage net camouflage net, providing a method for quantitatively evaluating the camouflage effect of decorative pieces on the camouflage net through computer digital image processing.