
Vein Image Acquisition Method Based on Quality Assessment Model Without Reference
JIA Xu, CAO Yu-dong, SUN Fu-ming, CUI Jian-jiang, XUE Ding-yu
ACTA ELECTRONICA SINICA ›› 2015, Vol. 43 ›› Issue (2) : 236-241.
Vein Image Acquisition Method Based on Quality Assessment Model Without Reference
Because of dorsal vein properties difference between different persons,for different vein objects not all vein images with high qualities can be acquired when fixing acquisition system parameters,in the paper a new image quality assessment model is proposed according to vein characteristics,moreover,vein image can be acquired through self optimization based on assessment result.First,a measure function based on key information entropy is proposed,which measures vein information completeness;Second,another measure function based on Contourlet decomposition is proposed,which is used to judge whether vein directional information is rich or not;Third,the objective vein image quality assessment model without reference is formed by fusing the two measure functions.In final,iteration elimination method is proposed in order to overcome the defect of steepest descent method,which is easy to fall into local optimum during optimization process.Experiments show the proposed quality assessment model is controllable and can meet the characteristics of human visual system,in the meantime the number of iterations can be reduced effectively through the proposed iteration elimination method,and the real-time requirement of acquisition system can be ensured.
vein acquisition / quality assessment / steepest descent method / contourlet decomposition {{custom_keyword}} /
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