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Fingerprint image fragment splicing method

A fingerprint image and image technology, applied in the field of splicing fingerprint image fragments, can solve the problems of not reducing storage space, sacrificing storage space, reducing calculation accuracy, etc., and achieve the effect of reducing calculation amount, optimizing program, and reducing calculation amount

Active Publication Date: 2008-03-12
FEITIAN TECHNOLOGIES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the first two methods, the part is to reduce the calculation accuracy, which has a certain impact on the results, while the third method sacrifices a lot of storage space
None of these algorithms reduces storage space

Method used

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Embodiment Construction

[0026] When the fingerprint is collected by the scanning fingerprint sensor, the finger is scratched on the sensor, and the sensor collects multiple frames of fingerprint images in sequence, and Fig. 2 and Fig. 3 are two adjacent frames of fingerprint images collected successively. Segment, by setting a short acquisition time interval, so that there is a matching or very similar block in two adjacent frame image segments, the degree of matching is measured by similarity, and the basis for measurement is continuous The gray values ​​of some pixels in the two frames of images are the same or similar. The similarity is the distance function of the corresponding pixel gray value, and the distance function used in this embodiment is the variance operation of two corresponding pixel gray values, such as:

[0027] Define the similarity of image lines: use line correspondence, that is, take a line in each of the two frames of images, and use the sum of the squares of the difference be...

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Abstract

The invention relates to a method for pasting-up the finger mark image section in the field of finger mark image processing course method. It can condense the paste-up finger mark image section and then pastes-up the finger mark image section.

Description

technical field [0001] The invention relates to a fingerprint image processing process control method, in particular to a splicing method of fingerprint image fragments. technical background [0002] With the continuous development and improvement of biometric technology, products related to fingerprint identification are constantly being developed. In the past two years, there have been fingerprint collection chips that rely on scanning to form fingerprint images. Due to the small area, the cost of this type of fingerprint collection chip is also much lower than that of touch-type surface collection chips and optical collection devices. The dynamic and static power consumption is also very low, and it has been widely used recently. The collection principle of this type of collector is: collect images frame by frame, and then splicing several frames of fingerprint image fragments into a complete fingerprint image through image splicing. Generally, the entire fingerprint i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00
Inventor 陆舟于华章
Owner FEITIAN TECHNOLOGIES