Fingerprint image quality evaluation is crucial in eliminating poor fingerprint images.This will heavily affect the performance of embedded automatic fingerprint identification system.A new method based on the intrinsic directional features of fingerprint is proposed to evaluate the quality of images captured by FPS200 sensor.Using directional map

the available area of image and clearness are checked to calculate the overall image quality score that can be used to quantitatively determine the quality of the fingerprint image.If the quality of image is unsatisfied

then embedded AFIS adjusts the parameters of FPS200 sensor automatically until image of good quality is captured.The result shows that this method indeed can improve the performance of embedded AFIS.