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1. WO2020228181 - PALM IMAGE CROPPING METHOD AND APPARATUS, COMPUTER DEVICE AND STORAGE MEDIUM

Publication Number WO/2020/228181
Publication Date 19.11.2020
International Application No. PCT/CN2019/103179
International Filing Date 29.08.2019
IPC
G06K 9/00 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
CPC
G06K 9/00067
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
00006Acquiring or recognising fingerprints or palmprints
00067Preprocessing; Feature extraction (minutiae)
G06K 9/34
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
20Image acquisition
34Segmentation of touching or overlapping patterns in the image field
G06K 9/6256
GPHYSICS
06COMPUTING; CALCULATING; COUNTING
KRECOGNITION OF DATA; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
9Methods or arrangements for reading or recognising printed or written characters or for recognising patterns, e.g. fingerprints
62Methods or arrangements for recognition using electronic means
6217Design or setup of recognition systems and techniques; Extraction of features in feature space; Clustering techniques; Blind source separation
6256Obtaining sets of training patterns; Bootstrap methods, e.g. bagging, boosting
Applicants
  • 平安科技(深圳)有限公司 PING AN TECHNOLOGY (SHENZHEN) CO., LTD. [CN]/[CN]
Inventors
  • 侯丽 HOU, Li
  • 王福晴 WANG, Fuqing
Agents
  • 深圳市世联合知识产权代理有限公司 SL INTELLECTUAL PROPERTY CO., LTD.
Priority Data
201910401330.415.05.2019CN
Publication Language Chinese (ZH)
Filing Language Chinese (ZH)
Designated States
Title
(EN) PALM IMAGE CROPPING METHOD AND APPARATUS, COMPUTER DEVICE AND STORAGE MEDIUM
(FR) PROCÉDÉ ET APPAREIL DE CADRAGE D'IMAGE DE PAUME, DISPOSITIF INFORMATIQUE ET SUPPORT DE STOCKAGE
(ZH) 手掌图像裁剪方法、装置、计算机设备及存储介质
Abstract
(EN)
A palm image cropping method and apparatus, a computer device and a storage medium. The method comprises the following steps: acquiring an image to be processed (S101); inputting the image into a pre-trained cascaded pose regression model, and acquiring key palm points output, in response to the image, by the cascaded pose regression model, wherein the key palm points output by the cascaded pose regression model at least comprise an index finger base A, a little finger base B and a middle fingertip D (S102); according to the key palm points, calculating a palm center point C of a palm in the image (S103); and with the palm center point C as the center, cropping the image according to a circle or a rectangle that at least includes the index finger base A and the little finger base B to acquire a palmprint image of the palm in the image to be processed (S104). The cropped image includes key points for palmprint recognition, thereby avoiding the interference of a complicated background and reducing the error rate of palmprint recognition.
(FR)
La présente invention concerne un procédé et un appareil de cadrage d'image de paume, un dispositif informatique et un support de stockage. Le procédé comprend les étapes suivantes consistant à : acquérir une image à traiter (S101) ; entrer l'image dans un modèle de régression de pose en cascade pré-entraîné, et acquérir une sortie de points palmaires clés, en réponse à l'image, avec le modèle de régression de pose en cascade, les points palmaires clés délivrés par le modèle de régression de pose en cascade comprenant au moins une base d'index A, une base d'auriculaire B et un majeur D (S102) ; selon les points palmaires clés, calculer un point C du centre de la paume d'une paume dans l'image (S103) ; et avec le point central de la paume C comme centre, cadrer l'image selon un cercle ou un rectangle qui comprend au moins la base d'index A et la base d'auriculaire B pour acquérir une image d'empreinte palmaire de la paume dans l'image à traiter (S104). L'image cadrée comprend des points clés pour la reconnaissance palmaire, ce qui permet d'éviter l'interférence d'un arrière-plan compliqué et de réduire le taux d'erreur de la reconnaissance d'empreinte palmaire.
(ZH)
一种手掌图像裁剪的方法、装置、计算机设备及存储介质,所述方法包括下述步骤:获取待处理的图像(S101);将所述图像输入到预先训练的级联姿势回归模型,获取所述级联姿势回归模型响应所述图像而输出的手掌关键点,其中,所述级联姿势回归模型输出的手掌关键点至少包括食指指根A、小指指根B、中指指尖D(S102);根据所述手掌关键点,计算所述图像中手掌的掌心点C(S103);以所述掌心点C为中心,以至少包含所述食指指根A和所述小指指根B的圆形或矩形对所述图像进行裁剪,获取所述待处理图像中手掌的掌纹图像(S104)。经过裁剪的图像包含掌纹识别的关键点,避免了复杂背景的干扰,降低了掌纹识别的误差率。
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