It is easy for infrared focal plane array (IRFPA) to produce fringe nonuniformity (NU) when works for long hours or the environment changes violently. Aiming at this problem

a dynamic nonuniformity correction without covering the imaging field and hardware implementation technology was investigated. A scene-based algorithm - improved constant statistics NUC (ICS-NUC) was presented. The fringe NU was reduced by balancing the statistics of vertical channels

and a dynamic NUC was realized by using forgetting factor in inter-frame iterative process. An ICS-NUC algorithm flow based on an uncooled IRFPA module with BF561 DSP platform was described. Then

two ICS-NUC algorithm - mean filter ICS (ICSA) and median filter ICS (ICSM) – were implemented on the platform. It was very effective on correcting the fringe NU dynamically

and the whole infrared image quality was increased. The experiment showed that the fringe NU of IR image was reduced after ICS-NUC. The NU of IRFPA module UR was decreased from 3.43% to 1.82% (ICSA) and 0.91% (ICSM). After 4 hours continuous operation

the NU of IRFPA module UR was still decreased from 5.05% (drifted) to 0.92% (using ICSM). The implementation of ICS-NUC algorithm on IRFPA module laid a technical foundation for the following study and applications of high-performance thermal imaging systems.