For being susceptible to noise and high real-time requirements during infrared image transmission and comparing with the other two infrared image enhancement algorithms, a revised infrared image histogram projection enhancement algorithm is proposed. The algorithm not only meets real-time requirement but also implements easily in hardware. Field-programmable gate array (FPGA) with plenty of internal logic resources is taken as the core processor to complete infrared image enhancement algorithm implementation in hardware. Experimental results show that the design is feasible.