Unveiling the cheating mask of camouflage is of great significance in scientific and military research, but the acquisition of detailed information about camouflaged objects remains extremely difficult. This paper presents a fringe projection decamouflaging (FPDC) approach that can provide the position, outer rim profile, and shadow information about well-camouflaged objects in a complex scenario. FPDC requires no expensive instruments, just one camera and one projector for monitoring. A bionic detection field, namely, a phase-jump field, is established to detect the intrusion of camouflaged objects. Based on local variations in this field, multiple-parameter decamouflaging is achieved for the first time. Simulations and experiments show the superiority of this technique, which has potential applications in counterespionage, discovery of wild animals, and search-and-rescue.