An effective hand vein feature extraction method.

<bold>Background: </bold>As a new authentication method developed years ago, vein recognition technology features the unique advantage of bioassay.<bold>Objective: </bold>This paper studies the specific procedure for the extraction of hand back vein characteristics.<bold>Methods: </bold>There are different positions used in the collecting process, so that a suitable intravenous regional orientation method is put forward, allowing the positioning area to be the same for all hand positions. In addition, to eliminate the pseudo vein area, the valley regional shape extraction operator can be improved and combined with multiple segmentation algorithms. The images should be segmented step by step, making the vein texture to appear clear and accurate. Lastly, the segmented images should be filtered, eroded, and refined. This process helps to filter the most of the pseudo vein information.<bold>Results: </bold>Finally, a clear vein skeleton diagram is obtained, demonstrating the effectiveness of the algorithm.<bold>Conclusion: </bold>This paper presents a hand back vein region location method. This makes it possible to rotate and correct the image by working out the inclination degree of contour at the side of hand back. [ABSTRACT FROM AUTHOR]