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Image processing method and device and electronic system

An image processing and fingerprint image technology, applied in character and pattern recognition, instruments, computer parts, etc., can solve the problems of poor fingerprint image preprocessing, high fingerprint recognition FRR, insensitive temperature sensor, etc. The effect of reducing FRR and improving the processing effect

Pending Publication Date: 2020-05-08
BEIJING JIIOV TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to factors such as insensitive temperature sensors and unstable identification strategies, the fingerprint information obtained by fingerprint identification preprocessing is usually inaccurate, the preprocessing effect of fingerprint images is poor, and the FRR of fingerprint identification is still high under low temperature conditions.

Method used

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  • Image processing method and device and electronic system
  • Image processing method and device and electronic system
  • Image processing method and device and electronic system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] First, refer to figure 1 An example electronic system 100 for implementing the image processing method and apparatus of the embodiments of the present invention will be described.

[0033] Such as figure 1 A schematic structural diagram of an electronic system is shown, the electronic system 100 includes one or more processing devices 102, one or more storage devices 104, input devices 106, output devices 108 and one or more image acquisition devices 110, these components The interconnections are via bus system 112 and / or other forms of connection mechanisms (not shown). It should be noted that figure 1 The components and structures of the electronic system 100 shown are exemplary rather than limiting, and the electronic system may also have other components and structures as required.

[0034] The processing device 102 may be a gateway, or an intelligent terminal, or a device including a central processing unit (CPU) or other forms of processing units with data proc...

Embodiment 2

[0041] This embodiment provides an image processing method, which is executed by the processing device in the above-mentioned electronic system; the processing device may be any device or chip capable of data processing. Such as figure 2 A flow chart of an image processing method shown, the image processing method includes the following steps:

[0042] In step S202, the electronic device acquires a fingerprint image.

[0043] A fingerprint image refers to an image containing fingerprint information. The fingerprint information is information describing the texture of the fingerprint. The fingerprint image includes a background image in addition to the fingerprint information. The other areas of the fingerprint image except the fingerprint information are called background images. The electronic equipment can be the image acquisition equipment of the above-mentioned electronic system, that is, the fingerprint image can be collected by the image acquisition equipment of the ab...

Embodiment 3

[0052] This embodiment provides another image processing method, which is implemented on the basis of the above embodiments; this embodiment focuses on the specific process of judging whether the fingerprint image meets the preset conditions. Such as image 3 The flow chart of another image processing method shown, the image processing method in this embodiment includes the following steps:

[0053] In step S302, the electronic device acquires a fingerprint image.

[0054] The electronic device is in a screen-locked state in advance, and when the user presses or touches the screen of the electronic device with a finger, a touch operation will be generated, and the electronic device will obtain a fingerprint image in response to the touch operation.

[0055] Step S304, extracting fingerprint information from the fingerprint image based on the pre-stored fingerprint dynamic background; judging whether the fingerprint image satisfies a preset condition according to the first fre...

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Abstract

The invention provides an image processing method and device and an electronic system. The method comprises the steps: enabling the electronic equipment to acquire a fingerprint image; judging whetherthe fingerprint image meets a preset condition or not based on a pre-stored fingerprint dynamic background and the fingerprint image; and when the fingerprint image satisfies a preset condition, updating a pre-stored fingerprint dynamic background based on the fingerprint image and a previous fingerprint image acquired by the electronic device. In the mode, the updated fingerprint dynamic background has the characteristics of the fingerprint image acquired this time and the characteristics of the previous fingerprint image at the same time, the effect of the fingerprint dynamic background canbe ensured to be better under the condition that the fingerprint image is abnormal this time, the processing effect of the fingerprint image is improved, and the false rejection rate of fingerprint identification in an abnormal state is reduced.

Description

technical field [0001] The invention relates to the technical field of fingerprint identification, in particular to an image processing method, device and electronic system. Background technique [0002] Cross-state fingerprint recognition has always been a difficult point in off-screen fingerprint recognition technology. Because the environment where users usually enter fingerprint templates is relatively simple and the fingerprint image is relatively clear. In contrast, the scene of using a mobile phone is more complicated, resulting in a larger difference between the unlocked image and the template image. Large, the recognition FRR (False Rejection Rate, false rejection rate) is high. In a low temperature environment, the hardware itself will produce some noise different from that at normal temperature. At the same time, the finger itself will also change due to temperature. The fingerprint shrinks due to low temperature, and the fingerprint image becomes blurred. There ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1347G06V40/13
Inventor 吴桐吴拥
Owner BEIJING JIIOV TECH CO LTD
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