Iris positioning method and device

An iris positioning and iris technology, applied in the computer field, can solve the problems of high iris image quality requirements, long computing time, large storage overhead, etc., and achieve the effects of saving time and storage overhead, less training parameters, and small network scale

Inactive Publication Date: 2016-02-03
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0008] In view of this, an embodiment of the present invention provides an iris positioning method and device to solve the problems that the existing ir...

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  • Iris positioning method and device
  • Iris positioning method and device

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Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] figure 1 The implementation flowchart of the iris positioning method provided by the embodiment of the present invention is shown, and the details are as follows:

[0038] In step S101, an iris image is acquired, and the iris image is calibrated.

[0039] figure 2 A schematic diagram of calibrating an iris image in the iris positioning method provided by the embodiment of the present invention is shown.

[0040] image 3 A schematic diagram showing the calibration effect of iris image calibration in the iris positioning method provided by the embodiment of the present invention is shown...

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Abstract

The invention is applicable to the technical field of computers and provides an iris positioning method and device. The method comprises the steps of obtaining an iris image and calibrating the iris image; generating a binary mask layer label; generating training data according to the iris image and the binary mask layer label; establishing a deconvolution neural network; inputting the training data into the deconvolution neural network and calculating feature data of the training data; training a deconvolution neural network classifier according to the feature data and the binary mask layer label; and conducting iris positioning on the iris image through classifying the feature data by means of the deconvolution neural network classifier. The invention discloses an iris positioning technical scheme based on the deconvolution neural network and can realize supervised learning of iris positioning. The requirement on iris image quality is low, the size of the deconvolution neural network is small, and the number of training parameters and the computation amount are small, so that time and storage costs are reduced. Local extrema are avoided, and thus more precise iris positioning is achieved.

Description

technical field [0001] The invention belongs to the technical field of computers, and in particular relates to an iris positioning method and device. Background technique [0002] In the prior art, the Daugman positioning method, the Hough transform positioning method, the geometric feature positioning method and the active contour line positioning method are generally used for iris positioning. [0003] Daugman positioning method: In the captured iris image, there are certain differences in the gray distribution. Generally, the iris is brighter than the pupil, and the sclera is brighter than the iris. According to the fact that the shape of the iris is similar to a ring, the Daugman positioning method uses circular detection. Matcher's method for segmenting irises. The disadvantage of the Daugman positioning method is that the algorithm has a strong dependence on the brightness gradient of the image, so the iris positioning can only be performed accurately when the illumin...

Claims

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Application Information

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IPC IPC(8): G06K9/00
CPCG06V40/193
Inventor 乔宇徐霄张飞云陈阳
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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