Stepwise Quality Evaluation of the Sequence Iris Images
Yuanning Liu · Aeronautical Computing Technique · 2007
Iris images with bad quality will be rejected by the automatic iris recognition system,which will result in the failure of identification or verification.Therefore it is necessary to introduce the quality evaluation process of iris images in the phase of image acquisition,which aims to pick out the iris images with high quality from the video sequences captured by the image acquisition devices.This paper carries out quality evaluation of input sequence images according to the characteristics of images.Different thresholds are established in different stages,and only the images that meet the needs of the thresholds are able to enter the next evaluation stage.In this way,evaluation time for the sequence images is reduced effectively,and the quality and speed of selected images can be guaranteed.The experimental results show that the new algorithm is effective to pick out the iris images with high quality.