CN102055836A - 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 present invention relates to the gesture motion control of portable terminal, especially portable terminals such as mobile phone, MID.
Background technology
Utilize gesture motion recognition technology control electronic equipment to become a kind of trend, present gesture motion recognition technology mainly is to absorb operator's action (generally being hand motion) and carry out great amount of images computing, analysis by camera, judge user's direction of action, and then the control electronic equipment.Yet, utilize above-mentioned Gesture Recognition control mobile phone, MID mobile terminal devices such as (mobile internet devices) also to have many obstacles, at first, some mobile terminal devices also do not have camera, therefore can't satisfy the requirement of technique scheme on hardware; Secondly, because the limitation of technology and the pressure on the cost, the data-handling capacity of present mobile terminal device is very limited, and the algorithm more complicated of existing action recognition technology, and the hardware requirement height, 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 use, especially in the game control process of portable terminal, the speed and the precision of carrying out action recognition by camera all are difficult to satisfied accurate control requirement to recreation.
Therefore, the real necessity that belongs to of the action recognition technology that provide a kind of low cost, easily realizes.
Summary of the invention
The purpose of this invention is to provide a kind of portable terminal and action identification method thereof, be intended to solve existing action recognition technology and realize that cost height, accuracy are low, can't be applied to the defective in the portable terminal with action recognition function.
For achieving the above object, portable 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 the main body that described central processing unit connects each infrared ray sensor respectively and handles its detected human body infrared signal.
More specifically, described three rectangular triangles of infrared ray sensor are distributed on the main body front of described portable terminal.
The infrared ray sensor of four rectangular distributions is set on same of the described main body more specifically.
Action identification method with portable terminal of action recognition function provided by the invention may further comprise the steps:
Step a is by the speed of two infrared ray sensor detected operate time of interval calculation actions;
Step b if the speed of action falls within the velocity interval of systemic presupposition, then is judged as reasonable action and makes response according to direction of action.
More specifically, described step a further may further comprise the steps:
Step a1 judges wherein whether any infrared ray sensor senses action, if sense action then be recorded as the very first time;
Step a2, whether in the given time have another infrared ray sensor continue sense action, if sense then be recorded as for second time if judging;
Step a3 according to the time difference of the very first time and second time and the distance of sensing two infrared ray sensors of action, calculates the speed of action.
More specifically, among the described step b, if the speed of action then is judged as non-reasonable action outside the velocity interval of systemic presupposition.
More specifically, in described step b, judge the direction of action in proper order 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.
Portable 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 the portable 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 various portable terminals such as mobile phone, MID.
Description of drawings
Fig. 1 is the structural representation of the portable terminal with action recognition function that provides of preferred embodiment of the present invention;
Fig. 2 is the internal wiring connection diagram of the portable 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,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
Normal human body all has constant body temperature, generally at 37 degree, so can send the infrared ray about specific wavelength 10UM, infrared ray sensor about by the 10UM that surveys the human body emission infrared ray and carry out work, its principle is as follows: the infrared ray about the 10UM of human body emission gathers on the infrared induction source after strengthening by the Fei Nier filter, the pyroelectricity element is adopted in the infrared induction source usually, this pyroelectricity element will lose charge balance when receiving the human infrared radiation variations in temperature, and outwards discharge electric charge, by producing alarm signal after the follow-up processing of circuit.In order only to guarantee sensitive for infrared radiation to human body, be coated with special Fei Nier filter usually at the radiating surface of infrared ray sensor, the infrared ray that can well suppress in the environment disturbs.Luxuriant and rich with fragrance Neil filter has different focal length (distance of reaction), thereby produces different monitoring visual fields according to the performance requirement difference, and the visual field is many more, controls tight more.The infrared detection of human body belongs to the category of prior art, does not give unnecessary details at this.
Basic principle of the present invention is to adopt a plurality of infrared ray sensors that are arranged on the portable terminal to respond to people's gesture motion, calculate each infrared ray sensor by processor (CPU) then 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 actions identification, then can 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 in proper order, respond accordingly according to direction of action by portable terminal at last and handle.
Shown in Fig. 1, the portable 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 four infrared ray sensor A, B, C, D respectively and handles its detected human body infrared signal by SPI (Serial Peripheral Interface) line.
Shown in Fig. 3, brandishing action with the human body gesture is example, 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 discerned of action with regard to 1 pair of above-mentioned two kinds of basic gesture of portable terminal with action recognition function provided by the invention and do detailed description.
Shown in Fig. 4, infrared ray sensor A with horizontal direction, B is an example, infrared ray sensor A at first, B induction angle and distance of reaction are provided with 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 the distance L between two infrared ray sensors, make the induction range of B of the A of infrared ray sensor and each infrared ray sensor not intersect and keep certain distance, certainly, being provided with of distance of reaction need be sensed brandishing of gesture and can not disturbed by human body, as mentioned before, this belongs to the category of known technology, does not give unnecessary details at this.Suppose that it is to move horizontally from right to left towards the portable 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, the hand along with the operator continues to be moved to the left then, 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 the infrared ray sensor B, can obtain gesture and brandish speed: V=L/T; The predefined velocity amplitude scope of comparison system is brandished action and is approved that this signal is reasonable actuating signal for gesture from right to left if this speed V within the velocity interval of systemic presupposition, then can judge this action then, carries out this action by system.
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 the actual conditions, brandishing of gesture possibly can't be accomplished complete level or vertical fully, may have certain angle, 4 kinds of gestures for example shown in Figure 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 all is not 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 then still calculated according to distance L between the AB, because what the present invention emphasized is the scope of speed, therefore as long as the action of brandishing of horizontal direction then still can be discerned and think to responsiveness within the velocity interval of systemic presupposition.In like manner, as long as gesture is brandished at infrared ray sensor A, C or entered infrared ray sensor B, D interval, as gesture 1 and gesture 4, and speed also can be thought brandishing on the 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 (might infrared ray sensor D also sense action simultaneously), then can be judged as oblique operation according to above-mentioned similar mode, produce oblique operating effect (perhaps be equivalent to a vertically-acting and add a horizontal balance), this is that system can preset, and also is that those skilled in the art are understandable in this area.
Shown in Fig. 6, action identification method provided by the invention specifically may further comprise the 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 whether need to start this function, select by the user by application program launching interface prompting user.
If started the action recognition function, judge in step 61 then wherein whether any infrared ray sensor senses action, move then execution in step 62 if sense, writing time T0, whether judge in step 63 then has another infrared ray sensor to continue to sense action in the given time, if, then in step 64 writing time T1, in step 65, calculate the speed of action then, and judge in step 66 whether responsiveness falls within the velocity interval of systemic presupposition, if not, then be judged as non-reasonable action, return execution in step 61, if, then be judged as reasonable action and make response, so just finish the once identification of action according to direction of action.
The above embodiment of the present invention is by the identification of four infrared ray sensors realization actions, and identifying is very simple, and cost is low, the accuracy height.Certainly, from the cost angle, also can realize the identification (infrared ray sensor B, C, D that for example rectangular triangle distributes) of action with three infrared ray sensors, high accuracy too further if desired, some infrared ray sensors also can be set more, can make more accurately action by a plurality of infrared ray sensors and judging.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within the protection range of claim of the present invention.
Claims (8)
1. the portable terminal that has the action recognition function, comprise the central processing unit that is arranged at body interior, it is characterized in that, described portable terminal further comprises at least three infrared ray sensors that are arranged on same of the main body, and described central processing unit connects each infrared ray sensor respectively and handles its detected human body infrared signal.
2. the portable terminal with action recognition function according to claim 1 is characterized in that, described three rectangular triangles of infrared ray sensor are distributed on the main body front of described portable terminal.
3. the portable terminal with action recognition function according to claim 1 is characterized in that, the infrared ray sensor of four rectangular distributions is set on same of the described main body.
4. the action identification method with portable terminal of action recognition function according to claim 1 is characterized in that may further comprise the steps:
Step a is by the speed of two infrared ray sensor detected operate time of interval calculation actions;
Step b if the speed of action falls within the velocity interval of systemic presupposition, then is judged as reasonable action and makes response according to direction of action.
5. the action identification method with portable terminal of action recognition function according to claim 4 is characterized in that, described step a further may further comprise the steps:
Step a1 judges wherein whether any infrared ray sensor senses action, if sense action then be recorded as the very first time;
Step a2, whether in the given time have another infrared ray sensor continue sense action, if sense then be recorded as for second time if judging;
Step a3 according to the time difference of the very first time and second time and the distance of sensing two infrared ray sensors of action, calculates the speed of action.
6. the action identification method with portable terminal of action recognition function according to claim 4 is characterized in that, among the described step b, if the speed of action then is judged as non-reasonable action outside the velocity interval of systemic presupposition.
7. the action identification method with portable terminal of action recognition function according to claim 4 is characterized in that, in described step b, judges the direction of action in proper order according to the induction of infrared ray sensor.
8. the action identification method with portable terminal of action recognition function according to claim 4 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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