WO2023272639A1 - Procédé de détection de trame de doigt stable et support de stockage lisible par ordinateur - Google Patents

Procédé de détection de trame de doigt stable et support de stockage lisible par ordinateur Download PDF

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Publication number
WO2023272639A1
WO2023272639A1 PCT/CN2021/103795 CN2021103795W WO2023272639A1 WO 2023272639 A1 WO2023272639 A1 WO 2023272639A1 CN 2021103795 W CN2021103795 W CN 2021103795W WO 2023272639 A1 WO2023272639 A1 WO 2023272639A1
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Prior art keywords
position frame
frame
frames
combination
finger
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PCT/CN2021/103795
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English (en)
Chinese (zh)
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卢浪平
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东莞市小精灵教育软件有限公司
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Priority to PCT/CN2021/103795 priority Critical patent/WO2023272639A1/fr
Publication of WO2023272639A1 publication Critical patent/WO2023272639A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the invention relates to the technical field of stable frame detection, in particular to a finger stable frame detection method and a computer-readable storage medium.
  • the present invention proposes a finger stable frame detection method, comprising:
  • the position frame stream in the finger movement process determine the finger movement speed in the finger movement process, the position frame stream is composed of a plurality of position frames arranged in chronological order, and one position frame is used to indicate where the user's finger is Describe a position during the movement of the finger;
  • the finger moving speed determine the first position frame whose finger moving speed is less than a preset speed in the position frame stream
  • a stable position frame is determined from the set of position frames for indicating where the user's finger stopped.
  • the present invention provides a computer-readable storage medium, which stores a computer program, and when the computer program is executed by a processor, the processor performs the following steps:
  • the position frame stream in the finger movement process determine the finger movement speed in the finger movement process, the position frame stream is composed of a plurality of position frames arranged in chronological order, and one position frame is used to indicate where the user's finger is Describe a position during the movement of the finger;
  • the finger moving speed determine the first position frame whose finger moving speed is less than a preset speed in the position frame stream
  • a stable position frame is determined according to the set of position frames for indicating where the user's finger stops.
  • the present application relates to a finger stable frame detection method and a computer-readable storage medium.
  • the method includes: determining the finger movement speed during the finger movement process according to the position frame stream during the finger movement process, and the position frame stream is determined by A plurality of position frames arranged in chronological order, one position frame is used to indicate a position of the user's finger during the finger movement process; according to the finger movement speed, it is determined in the position frame stream that the finger movement speed is less than A first position frame at a preset speed; in the position frame stream, using the first position frame as a starting frame, obtain a preset number of position frames to obtain a position frame set; determine a stable position according to the position frame set frame to indicate where the user's finger stopped.
  • the present invention takes the first position frame as the start frame, acquires a preset number of position frames, obtains a set of position frames, and determines a stable position frame, which can effectively avoid the influence of book background or other interferences, so that the detection error, thereby improving the accuracy of obtaining stable position frames.
  • Fig. 1 is the flowchart of finger stable frame detection method in an embodiment
  • Fig. 2 is the flowchart of finger stable frame detection method in one embodiment
  • Fig. 3 is the flowchart of finger stable frame detection method in one embodiment
  • Fig. 4 is the structural block diagram of finger stable frame detection device in an embodiment
  • Figure 5 is an internal block diagram of a computer device in one embodiment.
  • the present invention provides a kind of finger stable frame detection method, comprising:
  • Step 102 Determine the finger movement speed during the finger movement according to the position frame stream during the finger movement, the position frame stream is composed of a plurality of position frames arranged in chronological order, and one position frame is used to indicate the user's A position of a finger during said finger movement.
  • the finger stable frame detection method proposed by the present invention is suitable for point-reading devices.
  • the position frame stream during the movement of the finger is obtained, and the position coordinates and time of each position frame are obtained at the same time. According to the position coordinates and time of each position frame, the movement of the finger can be calculated speed.
  • determining the finger movement speed during the finger movement according to the position frame stream during the finger movement includes:
  • Step 1022 determine the position coordinates of each position frame in the position frame stream, and the time of each position frame.
  • the touch screen can detect the touch data of the finger, including position coordinates and time of each position frame.
  • ITO Indium-Tin Oxide, indium tin oxide
  • this capacitance is Commonly referred to as self-capacitance, that is, the capacitance of the electrode to the ground.
  • the self-capacitance screen detects the horizontal and vertical electrode arrays in sequence, respectively determines the horizontal and vertical coordinates according to the change in capacitance before and after the touch, and then combines them into the touch coordinates of the finger on the plane to obtain each position frame location coordinates.
  • Step 1024 determine multiple position frame combinations in the position frame stream, one position frame combination includes two adjacent position frames in the position frame stream.
  • the position frame stream select any adjacent two position frames to form a position frame combination, and select multiple groups of any adjacent two position frames to form multiple Combination of position frames.
  • the third location frame and the fourth location frame are combined into a location frame combination.
  • Step 1026 according to the time of two adjacent position frames corresponding to the first position frame combination, calculate the time interval between the two adjacent position frames corresponding to the first position frame combination, so as to obtain the first position frame Combining corresponding time intervals, the first position frame combination is any position frame combination in the plurality of position frame combinations.
  • the time interval between two adjacent position frames in the first position frame combination uses the time interval as the time interval of the first position frame combination time interval.
  • the combination of the first position frame includes the seventh position frame and the eighth position frame, and the time corresponding to the seventh position frame is the 18th millisecond, and the time corresponding to the eighth position frame is the 22nd millisecond, two The time interval between adjacent position frames is 4 milliseconds. Then, the time interval corresponding to the first position frame combination in this embodiment is 4 milliseconds.
  • Step 1028 according to the position coordinates of the two adjacent position frames corresponding to the first position frame combination, determine the distance between the two adjacent position frames corresponding to the first position frame combination, so as to obtain the first position frame combination The distance corresponding to a combination of position frames.
  • the distance between two adjacent position frames in the first position frame combination calculates the distance between two adjacent position frames in the first position frame combination, and use the distance as the distance of the first position frame combination .
  • the combination of the first position frame includes the seventh position frame and the eighth position frame, and the coordinates corresponding to the seventh position frame are (a, b), the coordinates corresponding to the eighth position frame are (c, d ), the distance between two adjacent position frames is Then, the distance corresponding to the first position frame combination in this embodiment is
  • Step 1030 according to the time interval corresponding to each position frame combination and the distance corresponding to each position frame combination, determine the finger movement speed corresponding to each position frame combination, so as to obtain the finger movement during the finger movement process speed.
  • the finger movement speed of each position frame can be calculated.
  • the finger movement speed corresponding to the first position frame combination is L/T.
  • Step 104 according to the finger moving speed, determine a first position frame in the position frame stream whose finger moving speed is lower than a preset speed.
  • the distance between each frame and the next frame is calculated through the position coordinates of each position frame, and the distance between each frame and the next frame is determined according to the distance and time between each frame and the next frame.
  • Finger movement speed According to the preset speed, determine the first position frame in the position frame stream whose finger movement speed is lower than the preset speed.
  • the finger movement speed when the finger movement speed is less than the preset speed, it means that the finger movement tends to be stable, and the first position frame whose finger movement speed is less than the preset speed is recorded as the stable start frame, and the stable frame is selected after the stable start frame. position frame.
  • determining the first position frame whose finger movement speed is less than a preset speed in the position frame combination includes: combining the corresponding finger movement speeds according to the position frames, Determining a second position frame combination whose finger moving speed is less than the preset speed; determining a previous position frame in the second position frame combination as the first position frame.
  • the second position frame combination includes the sixth position frame and the seventh position frame, and the finger movement speed corresponding to the second position frame combination is less than the preset speed, it means that the finger movement tends to be stable, and the second position frame
  • the sixth position frame in the frames serves as the first position frame.
  • Step 106 in the position frame stream, take the first position frame as a start frame, acquire a preset number of position frames, and obtain a target position frame set.
  • the first position frame is recorded as a start frame in the position frame stream, and a preset number of position frames after the start frame are assembled to obtain a position frame set. Specifically, the position order of all the position frames in the position frame set does not change, and is arranged in time sequence.
  • the first position frame is taken as the start frame, and the five position frames after the start frame are numbered 5, 4, 3, 2, and 1 respectively, and arranged in chronological order to form a set of position frames. Specifically, the sequence and serial number of each position frame in the set remain unchanged, which are still 5, 4, 3, 2, and 1.
  • Step 108 Determine a stable position frame according to the set of target position frames to indicate the position where the user's finger stops.
  • the finger movement speed when the finger movement speed is lower than the preset speed, it means that the finger movement tends to be stable, which means that the first position whose finger movement speed is lower than the preset speed is used as the starting frame, and the position frame set obtained by obtaining a preset number of position frames is more accurate. Easy to find stable position frames. After the stable position frame is determined from the position frame set, the coordinates of the stable position frame are used as the stop position of the user's finger.
  • the coordinates of the stable position frame are used as the stop position of the user's finger , that is, as the user's click location.
  • the present application relates to a finger stable frame detection method, the method comprising: determining the finger movement speed during the finger movement process according to the position frame stream during the finger movement process, the position frame stream is composed of multiple chronologically arranged Composed of position frames, one position frame is used to indicate a position of the user's finger during the movement of the finger; according to the movement speed of the finger, determine in the position frame stream that the movement speed of the finger is less than the preset speed.
  • Position frame in the position frame stream, take the first position frame as the start frame, acquire a preset number of position frames, and obtain a position frame set; determine a stable position frame according to the position frame set for indication The position where the user's finger stops.
  • the present invention takes the first position frame as the start frame, acquires a preset number of position frames, obtains a set of position frames, and determines a stable position frame, which can effectively avoid the influence of book background or other interferences, so that the detection error, thereby improving the accuracy of obtaining stable position frames.
  • the determining the stable position frame according to the target position frame collection includes:
  • Step 302 Determine an abnormal position frame in the set of target position frames, the position indicated by the abnormal position frame is not continuous with the positions indicated by other position frames, and the other position frames are in the set of target position frames except the A location frame other than an unusual location frame.
  • the abnormal position frame refers to an isolated frame.
  • the camera shoots the finger image, and the position frame obtained by the recognized fingertip is a continuous motion trajectory, and the interference point is generally a point that is misrecognized due to an image similar to the finger in the photographed image, and is generally not on the continuous trajectory of the finger movement. are isolated points scattered outside the continuous trajectory points.
  • the position frame obtained by the camera misidentifying the isolated point is not on the continuous motion trajectory generated by the recognized finger, and this position frame is an isolated frame at this time.
  • the determining the abnormal position frame in the target position frame set includes: obtaining the position coordinates of the second position frame and the position coordinates of the next position frame of the second position frame, the first position frame
  • the second position frame is any position frame in the set of target position frames; according to the position coordinates of the second position frame and the position coordinates of the next position frame of the second position frame, the relationship between the second position frame and the position frame is calculated.
  • the first position frame is used as the start frame, and a preset number of position frames are obtained to obtain a target position frame set, and the finger movement area is stable from the start frame of the first position. Therefore, the distance between two adjacent position frames in the target position frame set is relatively consistent, so if the distance between the second position frame and the next position frame of the second position frame is greater than the preset distance, then It indicates that the position frame following the second marked position frame is an abnormal position frame.
  • Step 304 Perform position correction on the abnormal position frame in the target position frame set, and determine a stable position frame according to the corrected target position frame set.
  • the abnormal position frame in the target position frame set After determining the abnormal position frame in the target position frame set, determine the distance and time interval between the previous position frame of the abnormal position frame and the next position frame of the abnormal position frame, and calculate the abnormal position frame according to the distance and time interval The average speed between the previous position frame of the abnormal position frame and the next position frame of the abnormal position frame, and finally calculate the previous position frame of the abnormal position frame according to the average speed, the time interval between the previous position frame of the abnormal position frame and the abnormal position frame The distance from the abnormal position frame, and update the position coordinates of the abnormal position frame.
  • the performing position correction on the abnormal position frame in the target position frame set includes: determining the difference between the previous position frame of the abnormal position frame and the subsequent position frame of the abnormal position frame and determine the first time interval between the previous position frame of the abnormal position frame and the next position frame of the abnormal position frame; calculate the average speed according to the first distance and the first time interval;
  • the position coordinates of the abnormal position frame are updated according to the position coordinates of the previous position frame of the abnormal position frame and the average speed. Specifically, after determining the position coordinates and the average speed of the previous position frame of the abnormal position frame, the previous position frame of the abnormal position frame is calculated according to the average speed and the time interval between the previous position frame of the abnormal position frame and the abnormal position frame. A distance between the position frame and the abnormal position frame, and update the position coordinates of the abnormal position frame.
  • the determining the stable position frame according to the corrected target position frame set includes: when there is no abnormal position frame in the corrected target position frame set, the corrected target position frame set The last position frame in is determined as the stable position frame.
  • the present invention proposes a finger stabilization frame detection device, comprising:
  • the first determination module determines the finger movement speed during the finger movement according to the position frame stream during the finger movement, the position frame stream is composed of a plurality of position frames arranged in time order, and one position frame is used to indicate A position of the user's finger during said finger movement.
  • the second determining module is configured to determine, in the stream of position frames, a first position frame whose finger movement speed is less than a preset speed according to the finger movement speed.
  • the acquisition module is configured to acquire a preset number of position frames in the position frame stream, taking the first position frame as a start frame, to obtain a set of target position frames.
  • the third determination module is configured to determine a stable position frame according to the set of target position frames to indicate the position where the user's finger stops.
  • the first determination module is also used to determine the position coordinates of each position frame in the position frame stream, and the time of each position frame; determine a plurality of position frames in the position frame stream Combination, a position frame combination includes two adjacent position frames in the position frame stream; according to the time of the two adjacent position frames corresponding to the first position frame combination, calculate the adjacent position frame corresponding to the first position frame combination The time interval between two position frames to obtain the time interval corresponding to the target position frame combination, the first position frame combination is any position frame combination in the plurality of position frame combinations; according to the target position The position coordinates of the two adjacent position frames corresponding to the frame combination, determine the distance between the two adjacent position frames corresponding to the target position frame combination, to obtain the corresponding distance of the target position frame combination; according to each position frame combination The corresponding time interval and the distance corresponding to each position frame combination determine the finger movement speed corresponding to each position frame combination, so as to obtain the finger movement speed during the finger movement process.
  • Fig. 5 shows an internal structural diagram of a finger stabilization frame detection device in an embodiment.
  • the finger stabilization frame detection device includes a processor, a memory and a network interface connected through a system bus.
  • the memory includes a non-volatile storage medium and an internal memory.
  • the non-volatile storage medium of the finger stable frame detection device stores an operating system and also stores a computer program, and when the computer program is executed by a processor, the processor can realize the finger stable frame detection method.
  • a computer program may also be stored in the internal memory, and when the computer program is executed by the processor, the processor may execute the finger stabilization frame detection method.
  • the finger stabilization frame detection device may include more or fewer components than shown in the figures, or combine certain components, or have a different arrangement of components.
  • a computer-readable storage medium which stores a computer program.
  • the processor executes the following steps: according to the position frame stream during the finger movement, Determine the finger moving speed during the finger movement, the position frame stream is composed of a plurality of position frames arranged in time order, and one position frame is used to indicate a position of the user's finger during the finger movement; according to For the finger movement speed, determine the first position frame whose finger movement speed is less than the preset speed in the position frame stream; in the position frame stream, use the first position frame as the starting frame to obtain a preset number of position frames to obtain a target position frame set; and determine a stable position frame according to the target position frame set to indicate the position where the user's finger stops.
  • the determining the finger movement speed during the finger movement according to the position frame stream during the finger movement includes: determining the position coordinates of each position frame in the position frame stream, and the The time of each position frame; determine a plurality of position frame combinations in the position frame stream, a position frame combination includes two adjacent position frames in the position frame stream; according to the first position frame combination corresponding adjacent For the time of two position frames, calculate the time interval between two adjacent position frames corresponding to the first position frame combination to obtain the time interval corresponding to the first position frame combination, and the first position frame combination It is any position frame combination in the plurality of position frame combinations; according to the position coordinates of the two adjacent position frames corresponding to the first position frame combination, determine the two adjacent position frames corresponding to the first position frame combination The distance between position frames to obtain the distance corresponding to the first position frame combination; according to the time interval corresponding to each position frame combination and the distance corresponding to each position frame combination, determine the corresponding position frame combination to obtain the finger movement speed during the finger movement.
  • determining the first position frame whose finger movement speed is less than a preset speed in the position frame combination includes: according to the finger movement speed corresponding to each position frame combination, Determining a second position frame combination whose finger moving speed is less than the preset speed; determining a previous position frame in the second position frame combination as the first position frame.
  • the determining the stable position frame according to the target position frame set includes:
  • An abnormal position frame is determined in the set of target position frames, the position indicated by the abnormal position frame is discontinuous with positions indicated by other position frames, and the other position frames are the set of target position frames except for the abnormal position frame Position frames other than the target position frame; perform position correction on the abnormal position frame in the target position frame set, and determine a stable position frame according to the corrected target position frame set.
  • the determining the abnormal position frame in the target position frame set includes:
  • the second position frame is any position frame in the set of target position frames; according to the second position The position coordinates of the frame and the position coordinates of the next position frame of the second position frame, calculate the distance between the second position frame and the next position frame of the second position frame; if the second position frame and If the distance between the next position frame of the second position frame is greater than the preset distance, it is determined that the position frame after the second marked position frame is the abnormal position frame.
  • the performing position correction on the abnormal position frame in the target position frame set includes: determining the difference between the previous position frame of the abnormal position frame and the subsequent position frame of the abnormal position frame and determine the first time interval between the previous position frame of the abnormal position frame and the next position frame of the abnormal position frame; calculate the average speed according to the first distance and the first time interval; The position coordinates of the abnormal position frame are updated according to the position coordinates of the previous position frame of the abnormal position frame and the average speed.
  • the determining the stable position frame according to the corrected target position frame set includes: when there is no abnormal position frame in the corrected target position frame set, adding The last position frame of is determined as a stable position frame.
  • Nonvolatile memory can include read only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory.
  • Volatile memory can include random access memory (RAM) or external cache memory.
  • RAM is available in many forms such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM), Enhanced SDRAM (ESDRAM), Synchronous Chain Synchlink DRAM (SLDRAM), memory bus (Rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), etc.
  • SRAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • DDRSDRAM Double Data Rate SDRAM
  • ESDRAM Enhanced SDRAM
  • SLDRAM Synchronous Chain Synchlink DRAM
  • Rambus direct RAM
  • DRAM direct memory bus dynamic RAM
  • RDRAM memory bus dynamic RAM

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)

Abstract

Un procédé de détection de trame de doigt stable consistant : en fonction d'un flux de trame de position au cours d'un processus de déplacement d'un doigt, à déterminer une vitesse de déplacement du doigt pendant le processus de déplacement du doigt, le flux de trame de position étant composé d'une pluralité de trames de position agencées chronologiquement, une trame de position étant utilisée pour indiquer une position d'un doigt d'un utilisateur durant le processus de déplacement du doigt ; en fonction de la vitesse de déplacement du doigt, à déterminer, dans le flux de trame de position, une première trame de position dans laquelle la vitesse de déplacement du doigt est inférieure à une vitesse prédéfinie ; à acquérir, à partir du flux de trame de position, un nombre prédéfini de trames de position en prenant la première trame de position en tant que trame de départ, de façon à obtenir un ensemble de trames de position ; et en fonction de l'ensemble de trames de position, à déterminer une trame de position stable, de façon à indiquer la position à laquelle s'arrête le doigt de l'utilisateur. Grâce à la présente invention, un nombre prédéfini de trames de position est acquis à partir d'un flux de trame de position en prenant une première trame de position en tant que trame de départ, de manière à obtenir un ensemble de trames de position, et une trame de position stable est ensuite déterminée, de sorte à éviter efficacement l'impact d'un arrière-plan de livre ou d'une autre interférence et à améliorer la précision d'acquisition de la trame de position stable.
PCT/CN2021/103795 2021-06-30 2021-06-30 Procédé de détection de trame de doigt stable et support de stockage lisible par ordinateur WO2023272639A1 (fr)

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CN113485579A (zh) * 2021-06-30 2021-10-08 东莞市小精灵教育软件有限公司 一种手指稳定帧检测方法、设备及计算机可读存储介质

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170102829A1 (en) * 2015-10-08 2017-04-13 Funai Electric Co., Ltd. Input device
CN109656457A (zh) * 2017-10-10 2019-04-19 北京仁光科技有限公司 多指触控方法、装置、设备及计算机可读存储介质
CN108647505A (zh) * 2018-04-19 2018-10-12 Oppo广东移动通信有限公司 指纹解锁方法及相关产品
WO2019200581A1 (fr) * 2018-04-19 2019-10-24 深圳市汇顶科技股份有限公司 Procédé de lissage de coordonnées, puce de commande tactile et terminal électronique
US20190325242A1 (en) * 2018-04-23 2019-10-24 Novatek Microelectronics Corp. Finger Stability Detecting Method and Fingerprint Sensing Device
CN112286386A (zh) * 2020-10-27 2021-01-29 北京小米移动软件有限公司 触屏点稳定的处理方法、系统、装置和介质
CN112306301A (zh) * 2020-11-02 2021-02-02 北京小米移动软件有限公司 触控数据的处理方法、装置、设备及存储介质
CN113485579A (zh) * 2021-06-30 2021-10-08 东莞市小精灵教育软件有限公司 一种手指稳定帧检测方法、设备及计算机可读存储介质

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