公开(公告)号：EP3264361A1

公开(公告)日：2018-01-03

申请号：EP16748536.6

申请日：2016-01-05

Applicant: BYD Company Limited

Inventor： ZHENG, Li ,  XU, Kunping ,  YANG, Yun

IPC: G06T7/00

CPC classification number: G06K9/0008 ,  G01B11/14 ,  G06T5/002 ,  G06T7/13 ,  G06T7/60 ,  G06T7/73 ,  G06T2207/20021 ,  G06T2207/30196

Abstract: The present disclosure discloses a method and device for calculating a line distance. The method includes: obtaining an original image and performing grayscale processing to generate a grayscale image; generating a radical image and a tangential image according to the grayscale image; performing filtering on the grayscale image according to the tangential image to generate a smoothened image and converting the smoothened image into a binary image; dividing the binary image into blocks and determining a radical direction of a center point of each block according to the radical image; traversing pixels in the radical direction of the center point of each block to calculate a number of times pixel values of two adjacent pixels within the each block change between a first pixel value and a second pixel value, and to calculate a coordinate and sub-pixel value of a boundary point corresponding to a changing-point; and generating the line distance according to the number of times of the change, and the coordinate and the sub-pixel value of the boundary point corresponding to the changing-point. The method seeks the boundary point of the fingerprint ridge lines and the fingerprint valley lines and calculates the line distance according to the coordinates and the sub-pixel value of the boundary point, improving accuracy, strengthening the ability to resist noise.

Abstract translation: 本公开公开了一种计算行距的方法和装置。 该方法包括：获取原始图像并进行灰度处理生成灰度图像; 根据灰度图像生成基础图像和切向图像; 根据所述切向图像对所述灰度图像执行滤波以生成平滑图像并将所述平滑图像转换为二值图像; 将所述二值图像分块，根据所述径向图确定各个块的中心点的径向方向; 遍历每个块的中心点的自由基方向上的像素，以计算每个块内的两个相邻像素的像素值在第一像素值和第二像素值之间改变的次数，并且计算坐标和子像素 与变化点对应的边界点的值; 根据所述变化次数以及与所述变化点对应的边界点的坐标和子像素值生成所述线距离。 该方法通过寻找指纹棱线和指纹谷线的边界点，根据边界点的坐标和子像素值计算出行距，提高了准确性，增强了抵抗噪声的能力。

公开(公告)号：EP3258416A1

公开(公告)日：2017-12-20

申请号：EP16748537.4

申请日：2016-01-05

Applicant: BYD Company Limited

Inventor： LEI, Lei ,  XU, Kunping ,  YANG, Yun

IPC: G06K9/00

CPC classification number: G06K9/00067 ,  G06K9/00 ,  G06K9/00087 ,  G06K9/34

Abstract: The present disclosure discloses method for calculating an area of a fingerprint overlapping region, including: collecting a to-be-matched fingerprint to obtain a to-be-matched fingerprint image; searching multiple pairs of matching characteristic points between the to-be-matched fingerprint image and a preset template fingerprint image; obtaining an image offset of the to-be-matched fingerprint image according to the multiple pairs of matching characteristic points; based on the image offset, adjusting a position of the to-be-matched fingerprint image to obtain an overlapping region between the to-be-matched fingerprint image and the preset template fingerprint image; and calculating a total number of image pixels within the overlapping region, and calculating an area of the overlapping region based on the total number of image pixels within the overlapping region. In the above calculation method, by dividing the overlapping region into individual image pixels and calculating the number of image pixels in the overlapping region to calculate the area of the overlapping region, it is possible to calculate the area of the overlapping region of any shape, and the calculated area is accurate at the pixel level. Thus, the calculated area may be more accurate, facilitating subsequent calculation, making fingerprint matching more accurate, and improving the user experience. The present disclosure also discloses an electronic device.

Abstract translation: 本发明公开了一种计算指纹重叠区域面积的方法，包括：采集待匹配的指纹，得到待匹配的指纹图像; 在所述待匹配的指纹图像与预设的模板指纹图像之间查找多对匹配的特征点; 根据所述多对匹配特征点获取所述待匹配指纹图像的图像偏移量; 根据所述图像偏移调整所述待匹配指纹图像的位置，得到所述待匹配指纹图像与所述预设模板指纹图像的重叠区域; 并且计算重叠区域内的图像像素的总数，并且基于重叠区域内的图像像素的总数来计算重叠区域的面积。 在上述计算方法中，通过将重叠区域划分成单独的图像像素并计算重叠区域中的图像像素的数量以计算重叠区域的面积，可以计算任何形状的重叠区域的面积， 并且计算的面积在像素级是准确的。 这样计算得到的面积可以更加准确，便于后续计算，使得指纹匹配更加准确，提高了用户体验。 本公开还公开了一种电子设备。

公开(公告)号：EP3308324A1

公开(公告)日：2018-04-18

申请号：EP16806838.5

申请日：2016-06-08

Applicant: BYD Company Limited

Inventor： LI, Zhengang ,  XU, Kunping ,  YANG, Yun

IPC: G06K9/00

CPC classification number: G01B7/28 ,  G06K9/0002

Abstract: The present disclosure provides a method and an apparatus for adjusting an excitation voltage of a fingerprint detection chip and a fingerprint detection chip. The method for adjusting an excitation voltage of a fingerprint detection chip includes: S1, transmitting an excitation signal to the metal ring by the signal transmitting unit, so as to detect a capacitance value of a coupling capacitance formed between the plurality of detection units in the second detection area and the metal ring; or enabling the metal ring grounded, and applying an excitation signal to the plurality of detection units in the second detection area by the signal transmitting unit, so as to detect a capacitance value of a coupling capacitance formed between the plurality of detection units in the second detection area and the metal ring; and S2, adjusting an excitation voltage of the first detection area according to the capacitance value of the coupling capacitance formed between the plurality of detection units in the second detection area and the metal ring.

公开(公告)号：EP3256988A1

公开(公告)日：2017-12-20

申请号：EP16748539.0

申请日：2016-01-05

Applicant: BYD Company Limited

Inventor： LI, Zhengang ,  XU, Kunping ,  YANG, Yun

IPC: G06K9/00

CPC classification number: G06K9/0002

Abstract: The present disclosure provides a fingerprint detection circuit and method. The circuit includes a fingerprint collecting module and a processing module. The fingerprint collecting module includes a plurality of collecting units, and each collecting unit has a regulation voltage and is configured to output a first voltage or a second voltage according to a capacitance value of one of ridge capacitors, a capacitance value of one of ridge capacitors and the regulation voltage. The processing module is configured to amplify the first and second voltages by a predetermined factor, to calculate a difference between the amplified first and second voltages, and to determine whether the difference is greater than or equal to the predetermined threshold. If no, the processing module adjusts at least one parameter, and configures the fingerprint detection circuit using at least one adjusted parameter.

公开(公告)号：EP2460156A1

公开(公告)日：2012-06-06

申请号：EP10803887.8

申请日：2010-07-19

Applicant: BYD Company Limited

Inventor： LI, Hai ,  XU, Kunping ,  YANG, Yun ,  FENG, Wei

IPC: G10L21/02

CPC classification number: G10L21/0208

Abstract: A method for cancelling background noise of an audio device comprises determining characteristic values of an audio signal to construct a characteristic signal reflecting a change trend of the audio signal, multiplying the determined characteristic signal with the audio signal to construct a multiplication signal, and amplifying the multiplication signal.