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Method, device, equipment and storage medium for rapid indexing of small-area fingerprint images

A fingerprint image and small-area technology, which is applied in still image data indexing, still image data retrieval, and acquiring/arranging fingerprints/palmprints. It can solve the problems of large memory, low efficiency, and inability to recognize small-area fingerprint images. Achieve the effects of saving memory usage, improving accuracy, and improving comparison efficiency

Active Publication Date: 2020-09-29
深圳市诺赛特系统有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] To sum up, the existing fingerprint identification strategies cannot identify small-area fingerprint images, and the memory required for indexing calculations is relatively large, and the efficiency is not high.

Method used

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  • Method, device, equipment and storage medium for rapid indexing of small-area fingerprint images
  • Method, device, equipment and storage medium for rapid indexing of small-area fingerprint images
  • Method, device, equipment and storage medium for rapid indexing of small-area fingerprint images

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Embodiment Construction

[0090] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0091] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contribution as required after reading this specification, but as long as they are within the rights of the present invention All claims are protected by patent law.

[0092] refer to figure 1 , figure 1 It is a schematic flowchart of the first embodiment of the fast indexing method for small-area fingerprint images of the present invention. In this embodiment, the fast indexing method for small-area fingerprint images includes:

[0093] When the index mechanism is established:

[0094] Step S10: Extracting a preset number of matching points from the reference fingerprint image, the extracted matching points at least include coordinate infor...

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Abstract

The present invention relates to the field of image comparison, and discloses a fast indexing method, device, equipment and readable storage medium for a small-area fingerprint image, which includes: determining the description area centered on feature points, and expressing the description area by the difference of feature data feature, so that the descriptor has a more stable expression ability. In addition, encoding the description information into binary data and then performing hash mapping can ensure the robustness of the encoding information. Further, through hash mapping, the different feature points Descriptor hashes are mapped into index values, which can preliminarily screen the entire data set during comparison, and extract matching point sets similar to feature points, avoiding the need to perform distance calculations with all points in the entire data set during query, and greatly improving Compare efficiency.

Description

technical field [0001] The invention relates to the field of image retrieval, in particular to a fast indexing method, device, equipment and storage medium for small-area fingerprint images. Background technique [0002] There are three key modules in the fingerprint image recognition system: fingerprint image preprocessing module, feature extraction module and feature comparison module. The fingerprint image preprocessing module is used to perform a series of processing on the original image. Different fingerprint identification systems choose different preprocessing methods, which may include fingerprint image filtering, gradient field and direction field calculation, image foreground and background separation, and image normalization. One, image enhancement, binarization, thinning, etc. The fingerprint image feature extraction module is mainly to extract the global feature or local feature information that can express the features of the fingerprint image. The methods th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F16/51G06F16/535G06K9/00G06K9/62
CPCG06F16/51G06F16/535G06V40/1365G06V10/757
Inventor 杨密凯韩鹏飞
Owner 深圳市诺赛特系统有限公司
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