Infrared target detecting and tracking is an important military application of the infrared technology, but the quality of
image and the precision of detecting and tracking system are greatly influenced by the environment disturbance as well
as the sensitivity of infrared acquisition equipment. A real-time fully-digital processing approach in an infrared target
detecting and tracking system is introduced. In this paper, based on a comparison study on the present methods for
quadrature sampling of signal, the sufficient-necessary condition for the sampling frequency choice is analyzed, and the
choice range has been extended. Correspondingly, a new fully-digital approach for in-phase and quadrature components
extraction is proposed and the expected results is obtained in experiments.
Objective: To observe the clinical therapeutic effect of intense pulsed light PhotoDerm (IPL PhotoDerm) for vascular
dermatosis and analysis the possible factors affecting the therapeutic effect. Methods: Treat all blank kinds of vascular
dermatosis 85 cases with IPL PhotoDerm, observe the therapeutic effect and no obvious side-effects of vascular
dermatosis. Results: The cure rate of telangiectasis, arterial spider nevus, strawberry nevus, avermrus uemongioma and
nevus flammeus with IPL PhotoDerm is respective 76.5%, 91.7%, 88.9%, 27.8%, 15%, and the cure rate in three times is
respective 35.3%, 91.7%, 66.7%, 5.6% and 5%. 6 eases appear pigmentation, pigment subsidence or atrophic scar.
Conclusion: The therapeutic effect of vascular dermatosis with IPL PhotoDerm is satisfying, and the no obvious side-effects is less.