|
Iris recognition technology has the unique advantage of today's biometric technology , this technology has developed in a variety of occasions , and has also been applied in the access control field . Based on the characteristics of the iris , describes the characteristics of the iris recognition technology , iris recognition system composition and working principle , from the pre-processing of the image of the iris ( iris location , normalized iris enhanced ) to the iris image feature extraction and coding successive explore the iris recognition algorithm , and in iris localization process introduced morphological wavelet transform method . Morphological wavelet transform is a combination of mathematical morphology and wavelet transform , the full integration the morphological wavelet the tower analysis techniques , to protect the details of the characteristics of the image . The median filtering of the original iris image , the iris image filtered morphology Harr wavelet transform to obtain the inner edge of the iris , and the experimental results . The iris recognition technology , iris access control system design of a TMS320DM642 DSP chip as the core processor , a study design portable use , open the iris recognition access control system . The design of the system : the acquisition iris image , iris image preprocessing , encoding recognition , thereby operating the execution status of the locks . Another article elaborated the main function modules of the system design , including power supply , memory expansion , iris image acquisition and processing , keyboard control , LCD display , door lock actuator alarm host communications . The system uses the DM642 DSP processing speed , high precision , fully consider the coordination of the system 's hardware and software design , ease of use , subjective easier to accept . [36 ] Table [ 1] parameter [ 55]
|