CN102055836B - Mobile terminal with action recognition function and action recognition method thereof - Google Patents
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Abstract
The invention provides a mobile terminal with an action recognition function and an action recognition method thereof. The speed of gesture actions of human bodies is judged by a plurality of infrared sensors arranged on the mobile terminal so as to judge the direction of the reasonable action gesture and make the corresponding response. The mobile terminal has a very simple structure and high recognition accuracy, is low in cost, and is suitable for various mobile terminals such as mobile phones, mobile internet devices (MID) and the like.
Description
Technical field
The gesture motion that the present invention relates to mobile terminal, the especially mobile terminals such as mobile phone, MID is controlled.
Background technology
Utilize the gesture motion recognition technology to control electronic equipment and become a kind of trend, current gesture motion recognition technology is mainly absorb operator's action (being generally hand motion) and carry out great amount of images computing, analysis by camera, judge user's direction of action, and then control electronic equipment.Yet, utilize above-mentioned Gesture Recognition to control the mobile terminal devices such as mobile phone, MID (mobile internet device) and also have many obstacles, at first, some mobile terminal devices also do not have camera, therefore can't on hardware, meet the requirement of technique scheme; Secondly, due to the limitation of technology and the pressure on cost, the data-handling capacity of present mobile terminal device is very limited, and the algorithm more complicated of existing action recognition technology, and hardware requirement is high, cost is also very high, therefore also can't be applied in most of mobile terminal devices; Moreover, the discrimination of existing action recognition technology is lower, can not be approved widely and apply, especially, in the game control process of mobile terminal, speed and the precision of carrying out action recognition by camera all be difficult to meet the accurate control requirement to game.
Therefore, the action recognition technology that provide a kind of low cost, easily realizes is real belongs to necessary.
Summary of the invention
The purpose of this invention is to provide a kind of mobile terminal and action identification method thereof with action recognition function, be intended to solve existing action recognition technology and realize that cost is high, accuracy is low, can't be applied to the defect in mobile terminal.
For achieving the above object, mobile terminal with action recognition function provided by the invention comprises the central processing unit that is arranged at body interior and is arranged at least three infrared ray sensors on same of main body, and described central processing unit connects respectively each infrared ray sensor and processes the human body infrared signal that it detects.
More specifically, described three rectangular Triangle-Profiles of infrared ray sensor are on the main body front of described mobile terminal.
The infrared ray sensor of four rectangular distributions is set on same of described main body more specifically.
Action identification method with mobile terminal of action recognition function provided by the invention comprises the following steps:
Step a, the speed of interval calculation action operate time detected by two infrared ray sensors;
Step b, if the action speed fall into the velocity interval of systemic presupposition within, be judged as reasonable action and make response according to direction of action.
More specifically, described step a is further comprising the steps:
Step a1, whether judgement wherein any infrared ray sensor senses action, if sense action be recorded as the very first time;
Step a2, whether judgement has another infrared ray sensor to continue to sense action in the given time, if sense be recorded as for the second time;
Step a3, according to the time difference of the very first time and the second time and the distance of sensing two infrared ray sensors of action, calculate the speed of action.
More specifically, in described step b, if the speed of action is judged as non-reasonable action outside the velocity interval of systemic presupposition.
More specifically, in described step b, sequentially judge the direction of action according to the induction of infrared ray sensor.
More specifically, before described step a according to the demand breakdown action recognition function of user or application program.
Mobile terminal and action identification method thereof with action recognition function provided by the invention judged the speed of human body gesture motion by a plurality of infrared ray sensors that are arranged on mobile terminal, judge the direction of reasonable action gesture and make corresponding, structure is very simple, accuracy of identification is higher, and with low cost, be highly suitable for the various mobile terminals such as mobile phone, MID.
The accompanying drawing explanation
Fig. 1 is the structural representation of the mobile terminal with action recognition function that provides of preferred embodiment of the present invention;
Fig. 2 is the internal wiring connection diagram of the mobile terminal with action recognition function that provides of preferred embodiment of the present invention;
Fig. 3 is that the human body gesture that preferred embodiment of the present invention relates to is brandished the direction of action schematic diagram;
Fig. 4 is the horizontal balance identification schematic diagram that preferred embodiment of the present invention provides;
Fig. 5 is the oblique action recognition schematic diagram that preferred embodiment of the present invention provides;
Fig. 6 is the flow chart of the action identification method that provides of preferred embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Normal human body has constant body temperature, generally at 37 degree, so can send the infrared ray of specific wavelength 10UM left and right, infrared ray sensor carries out work by the infrared ray of the 10UM left and right of surveying human-body emitting, its principle is as follows: the infrared ray of the 10UM left and right of human-body emitting gathers on the infrared induction source after strengthening by the Fei Nier filter, the infrared induction source adopts the pyroelectricity element usually, this pyroelectricity element will lose charge balance while receiving the human infrared radiation variations in temperature, and outwards discharge electric charge, by after follow-up processing of circuit, producing alarm signal.In order only to guarantee the sensitive for infrared radiation to human body, usually be coated with special Fei Nier filter at the radiating surface of infrared ray sensor, the infrared ray that can well suppress in environment disturbs.Luxuriant and rich with fragrance Neil filter, according to the performance requirement difference, has different focal length (distance of reaction), thereby produces different monitoring visual fields, and visual field is more, controls tighter.The infrared detection of human body belongs to the category of prior art, and therefore not to repeat here.
Basic principle of the present invention is to adopt a plurality of infrared ray sensors that are arranged on mobile terminal to respond to people's gesture motion, then calculate each infrared ray sensor by processor (CPU) and sense the human body infrared time difference, obtain the translational speed of human body (for example staff).If this translational speed is in the velocity interval of predetermined action recognition, can sequentially judge the direction of action (gesture is brandished) according to the induction of sensitive time of each infrared ray sensor and a plurality of infrared ray sensors, finally by mobile terminal, according to direction of action, respond accordingly and process.
Shown in Fig. 1, the mobile terminal with action recognition function 1 that preferred embodiment of the present invention provides comprises the CPU (central processing unit that is arranged on body interior, figure does not show) and be arranged on four infrared sensor A, B, C, the D in main body front (during operation face operator one side), in conjunction with referring to shown in Fig. 2, CPU connects respectively four infrared ray sensor A, B, C, D and processes the human body infrared signal that it detects by SPI (Serial Peripheral Interface) line.
Shown in Fig. 3, it is example that the human body gesture of take is brandished action, horizontal gesture is brandished and brandished with vertical gestures is the basic action of brandishing, can produce two kinds of basic control modes, below brandish the process identified of action with regard to 1 pair of above-mentioned two kinds of basic gesture of mobile terminal with action recognition function provided by the invention and be described in detail.
Shown in Fig. 4, infrared ray sensor A with horizontal direction, B is example, at first infrared ray sensor A, B induction angle and distance of reaction arrange according to demand, in Fig. 4, the induction angle that each infrared ray sensor is set is less than 90 °, the distance of reaction that each infrared ray sensor is set is less than 1/4th of two distance L between infrared ray sensor, make the induction range of the B of the A of infrared ray sensor and each infrared ray sensor not intersect and keep certain distance, certainly, arranging of distance of reaction need to be sensed brandishing of gesture and can not disturbed by human body, as mentioned before, this belongs to the category of known technology, therefore not to repeat here.Suppose that it is to move horizontally from right to left towards the mobile terminal 1 with action recognition function that gesture is brandished action, when entering the induction range of infrared ray sensor B, system (CPU) receives the B induced signal, obtain time T 0, then the hand along with the operator continues to be moved to the left, when entering the scope of infrared ray sensor A, system receives the A induced signal, obtain time T 1, then by T0 and T1, system can obtain from B to the time difference the A scope: T=T0-T1; According to the distance L between infrared ray sensor A and infrared ray sensor B, can obtain gesture and brandish speed: V=L/T; Then the predefined velocity amplitude scope of comparison system, brandish and move and approve that this signal is reasonable actuating signal for gesture from right to left if this speed V within the velocity interval of systemic presupposition, can judge this action, by system, carries out this action.
In like manner, level to the right gesture brandish and vertical gesture is brandished action and also can be judged by said method.Consider in actual conditions, brandishing of gesture possibly can't be accomplished complete level or fully vertical, may have certain angle, for example 4 kinds of gestures shown in Fig. 5 are brandished, as long as gesture is brandished and is being entered infrared ray sensor A, B or enter infrared ray sensor C, the D interval, as gesture 2 and gesture 3, this situation gesture is not all complete level, certain angle is arranged, but infrared ray sensor A, B or infrared ray sensor C, D still can sense action, and can obtain time T 0 and T1, distance is still calculated according to distance L between AB, what emphasize due to the present invention is the scope of speed, therefore need only responsiveness within the velocity interval of systemic presupposition, still can identify and think the action of brandishing of horizontal direction.In like manner, as long as gesture is brandished at infrared ray sensor A, C or enters infrared ray sensor B, D interval, as gesture 1 and gesture 4, and speed also can be thought brandishing on vertical direction within the velocity interval of systemic presupposition.Like this, the present invention just can have certain action tolerance, operates hommization more.Certainly, if infrared ray sensor C, B sense action (likely infrared ray sensor D also senses action) simultaneously, can be judged as oblique operation according to above-mentioned similar mode, produce oblique operating effect (or be equivalent to a vertically-acting add a horizontal balance), this is that system can be preset, and is also that in this area, those skilled in the art are understandable.
Shown in Fig. 6, action identification method provided by the invention specifically comprises the following steps:
In step 60, start the action recognition function, it is emphasized that, action identification method provided by the invention can be opened at any time or close according to user's request, also can for example interface prompting user, whether be needed to start this function by application program launching, selected by the user.
If started the action recognition function, in step 61, judge wherein whether any infrared ray sensor senses action, if sense action perform step 62, writing time T0, then in step 63, whether judgement has another infrared ray sensor to continue to sense action in the given time, if, in step 64 writing time T1, then calculate the speed of action in step 65, and within judging in step 66 whether responsiveness falls into the velocity interval of systemic presupposition, if not, be judged as non-reasonable action, return to execution step 61, if, be judged as reasonable action and make response according to direction of action, so just complete the identification of one-off.
The above embodiment of the present invention realizes the identification of action by four infrared ray sensors, identifying is very simple, and cost is low, and accuracy is high.Certainly, from the cost angle, also can realize with three infrared ray sensors the identification (for example infrared ray sensor B, C, the D of rectangular Triangle-Profile) of action, if need further too high accuracy, some infrared ray sensors also can be set more, by a plurality of infrared ray sensors, can make judgement more accurately to action.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in the protection range of the claims in the present invention.
Claims (3)
1. the mobile terminal that there is the action recognition function, comprise the central processing unit that is arranged at body interior, it is characterized in that, described mobile terminal further comprises at least three infrared ray sensors that are arranged on same of main body, described central processing unit connects respectively each infrared ray sensor and processes the human body infrared signal that it detects, described mobile terminal can be realized when the direction of action complete level or when fully vertical, as long as responsiveness is within the velocity interval of systemic presupposition, can identify and think the action of horizontal direction or vertical direction, identification to the human action direction has tolerance,
Described three rectangular Triangle-Profiles of infrared ray sensor are on the main body front of described mobile terminal; The infrared ray sensor of four rectangular distributions perhaps, is set on same of described main body;
The induction angle that each infrared ray sensor is set is less than 90 °, and the distance of reaction that each infrared ray sensor is set is less than 1/4th of two distances between infrared ray sensor.
2. the action identification method with mobile terminal of action recognition function according to claim 1 is characterized in that comprising the following steps:
Step a, the speed of interval calculation action operate time detected by two infrared ray sensors;
Step b, within if the speed of action falls into the velocity interval of systemic presupposition, be judged as reasonable action and make response according to direction of action, when the direction of action complete level or when fully vertical, as long as responsiveness is within the velocity interval of systemic presupposition, can identify and think the action of horizontal direction or vertical direction, the identification of human action direction is had to tolerance;
Described step a is further comprising the steps:
Step a1, whether judgement wherein any infrared ray sensor senses action, if sense action be recorded as the very first time;
Step a2, whether judgement has another infrared ray sensor to continue to sense action in the given time, if sense be recorded as for the second time;
Step a3, according to the time difference of the very first time and the second time and the distance of sensing two infrared ray sensors of action, calculate the speed of action;
In described step b, if the speed of action is judged as non-reasonable action outside the velocity interval of systemic presupposition;
In described step b, sequentially judge the direction of action according to the induction of infrared ray sensor;
The induction angle that each infrared ray sensor is set is less than 90 °, and the distance of reaction that each infrared ray sensor is set is less than 1/4th of two distance L between infrared ray sensor.
3. the action identification method with mobile terminal of action recognition function according to claim 2, is characterized in that, before described step a according to the demand breakdown action recognition function of user or application program.
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