CN101605399A - A kind of portable terminal and method that realizes Sign Language Recognition - Google Patents
A kind of portable terminal and method that realizes Sign Language Recognition Download PDFInfo
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Abstract
The invention discloses a kind of portable terminal and method that realizes Sign Language Recognition, comprise and gather video sign language module, image processing module, gesture database and identification module, wherein, gather video sign language module, after being used to gather the sign language image this sign language picture breakdown being continuous some frames, be transferred to image processing module; Image processing module is used for the sign language image of continuous some frames of receiving is handled, obtain gesture information after, send to identification module; Identification module is used to call gesture database, and gesture information is converted to voice.Therefore, portable terminal provided by the invention and method can be discerned sign language and sign language is converted to voice and other communication of mobile terminal.
Description
Technical field
The present invention relates to the communications of Mobile Terminals technology, particularly a kind of portable terminal and method that realizes Sign Language Recognition.
Background technology
Along with the continuous development of portable terminal, function integrated on the portable terminal is more and more, such as having increased music playback function and camera function etc.These integrated functions have been arranged, personalized service can be provided for dissimilar users.For sign language communication can't be provided with the deaf-mute of communication is exactly that portable terminal can adopt one of function that camera function provides.
The Sign Language Recognition technique functions comes from the nineties in last century, also is in conceptual phase at present.Gesture information step identification in the video Sign Language Recognition process roughly is divided into " visual pattern identification " and " data glove " two kinds.Generally speaking, be exactly by video acquisition sign language image, pass through the video acquisition gesture information by " visual pattern identification " or " data glove " mode.At last, again the gesture information that obtains is obtained statement according to default model.
At present, adopt the concrete scheme of video Sign Language Recognition to have following several:
First kind is charayahphan, and this method adopts visual pattern identification gesture information, resolves to the isolated vocabulary that ASL is represented, discrimination is 87%;
Second kind is Starner, and this method is adopted as the gesture information identification based on the single camera that is fixed in the desktop or the brim of a hat, utilizes the HMM model, reaches 75.4%～97.8% discrimination that does not wait;
The third is Vogler, and this method employing position tracker identification gesture information utilizes the HMM model that gesture information is carried out sign words and continuous statement is discerned, and reaches 92.1% and 95.8% discrimination;
The 4th kind is Deng, and this method is converted to statement according to the sign language database of setting up with the gesture information of gathering and shows after adopting the mode of " data glove " to gather gesture information, and discrimination reaches 93.6%.
From such scheme as can be seen, no matter adopt which kind of video Sign Language Recognition scheme, do not have all to realize that promptly portable terminal can't carry out the video Sign Language Recognition on portable terminal, the voice that identification can't be obtained send and the other side's portable terminal communicates.
Summary of the invention
In view of this, the invention provides a kind of portable terminal of realizing Sign Language Recognition, this portable terminal can be discerned sign language and sign language is converted to voice and other communication of mobile terminal.
The present invention also provides a kind of method that realizes Sign Language Recognition, and this method can be discerned sign language, and sign language is converted to voice and other communication of mobile terminal.
According to above-mentioned purpose, technical scheme of the present invention is achieved in that
A kind of portable terminal of realizing Sign Language Recognition comprises and gathers video sign language module, image processing module, gesture database and identification module, wherein,
Gather video sign language module, after being used to gather the sign language image this sign language picture breakdown being continuous some frames, be transferred to image processing module;
Image processing module is used for the sign language image of continuous some frames of receiving is handled, obtain gesture information after, send to identification module;
Identification module is used to call gesture database, and gesture information is converted to voice.
Preferably, described collection video sign language module, image processing module, gesture database and identification module are controlled by the central processor CPU in the portable terminal.
Preferably, described image processing module comprises background removal module, palm position judging module and extraction gesture information module, wherein,
The background removal module is used for removing the sign language image background that obtains according to the user's colour of skin information that prestores;
The palm position judging module, be used for from remove sign language image after the background orientation information in one's hands;
Extract the gesture information module, be used for extracting gesture information from the sign language image of removing after the background according to hand orientation information and the finger information that prestores.
Preferably, described gesture database, the user's colour of skin information that prestores and the finger information that prestores all are arranged in the memory of portable terminal.
A kind of method that realizes Sign Language Recognition, described method comprises:
Portable terminal is decomposed into continuous some frames with the sign language image of gathering;
Portable terminal is handled the sign language image of continuous some frames, obtains gesture information;
Portable terminal is converted to voice according to default gesture database with gesture information.
Preferably, described sign language image to continuous some frames is handled, and obtains gesture information and adopts " data glove " mode to carry out, and process is:
Preferably, the sign language image of described some frames is continuously gone up the sign language image that the band different colours refers to cap for finger;
After the sign language image of described continuous some frames carried out background removal, the palm of removing in the sign language image after the background is carried out ellipse fitting, orientation information in one's hands;
Towards determining to have the finger place relative position that different colours refers to cap, extract gesture information according to hand.
Preferably, described background removal is to remove according to user's colour of skin information of storage in advance;
It is preferably, described that to determine to have the finger place relative position that different colours refers to cap be to determine according to the finger information of storage in advance.
Preferably, the finger information of user's colour of skin information of described storage in advance and/or storage in advance is that the learning process of passing through portable terminal obtains.
Preferably, the sign language image of described some frames continuously is singlehanded image; Perhaps be the both hands image, wherein hand has the gloves of color.
Preferably, described gesture database adopts HMM model, CHMM model or TMHMM model, and gesture information is converted to text sentence, adopts text sentence-speech conversion function to be converted to voice then;
Preferably, described gesture database has been stored the voice messaging of corresponding different another gesture information according to singlehanded gesture information, describedly gesture information is converted to voice also needs to carry out according to the instruction that the user who receives sends;
Perhaps described gesture database is the speech database of the gesture information of corresponding two hands.
From such scheme as can be seen, the present invention utilizes the camera collection sign language video of portable terminal, through the conversion after obtain gesture information, according in advance the storage gesture database the gesture information that obtains is converted to voice messaging after, send and the other side's portable terminal communicates.Therefore, portable terminal provided by the invention and method can be discerned sign language and sign language is converted to voice and other communication of mobile terminal.
Description of drawings
Fig. 1 is the mobile terminal structure schematic diagram of realization Sign Language Recognition provided by the invention;
Fig. 2 is the method flow diagram of realization Sign Language Recognition provided by the invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, below lift specific embodiment and, the present invention is described in more detail with reference to accompanying drawing.
In order to realize gesture database being cached to the video Sign Language Recognition in the portable terminal on portable terminal, image processing is carried out in the sign language that portable terminal also needs video acquisition is obtained, and obtains meeting the gesture information of gesture database.Like this, could gesture information be converted to voice, communicate according to gesture database.
Therefore, Fig. 1 is the mobile terminal structure schematic diagram of realization Sign Language Recognition provided by the invention, comprising: gather video sign language module, image processing module, gesture database and identification module, wherein,
Gather video sign language module, be generally the portable terminal prior camera, be used to gather the sign language image of a period of time, and after this sign language picture breakdown is continuous some frames, be transferred to image processing module;
Image processing module is used for the sign language image of continuous some frames of receiving is handled, obtain gesture information after, send to identification module;
Identification module is used to call gesture database, gesture information is converted to voice after, export to existing communication module, communicate.
In this embodiment, whole process can be controlled by the central processing unit in the portable terminal (CPU), be that CPU is according to user instruction, the sign language image of the real-time frame of video sign language module collection is gathered in indication, after handling the sign language image that obtains by image processing module then, obtain gesture information, by identification module identification gesture information, obtain voice at last.
In this embodiment, gesture database can adopt existing HMM model, CHMM model or TMHMM model, and gesture information is converted to text sentence, adopts text sentence-speech conversion function to be converted to voice then, and this can adopt existing techniques in realizing.
In this embodiment, " data glove " mode of employing obtains gesture information, and specifically, five fingers on hand of giving the user exactly are with the finger cap of going up different colours.
At first, adopt the sign language image of gathering the real-time frame of video sign language module collection, the sign language image of collection will collect the finger cap that finger is gone up the different colours of band, is used to judge gesture.
Then, carry out background removal by image processing module, because the user fixes, in the face of portable terminal input sign language the time, background is user self, portable terminal can be in advance with user's colour of skin information stores on portable terminal, for judging, when obtaining the sign language image, keep palm and have the finger that different colours refers to cap according to user's colour of skin of storing in advance, remove background;
Once more, the palm of removing in the sign language image after the background (part that refers to cap except different colours) is carried out ellipse fitting, judge the length direction of palm, judge hand orientation information in the sign language image according to the length slope of palm by image processing module;
At last, by image processing module according to hand towards determining to have the finger place relative position that different colours refers to cap, extract gesture information, in this step, also need to prestore finger information, comprise information such as the thickness length of finger and joint finger tip, judge when being used to extract gesture information.
Therefore, image processing module can be divided into background removal module, palm position judging module and extract the gesture information module, wherein,
The background removal module is used for removing the sign language image background that obtains according to the user's colour of skin information that prestores;
The palm position judging module, be used for from remove sign language image after the background orientation information in one's hands;
Extract the gesture information module, be used for extracting gesture information from the sign language image of removing after the background according to the hand orientation information.
In this embodiment, the user's colour of skin information that prestores, have the finger information that different colours refers to cap, comprise the thickness length of finger and joint position etc., can obtain by learning process, detailed process is: at using the mobile terminal user personal characteristics, comprise palm, point each joint and arthrogryposis degree, carry out sign language study in advance, obtain user's colour of skin information, have the finger information that different colours refers to cap, and storage, use during as the video Sign Language Recognition.
This embodiment just describes at carrying out the video Sign Language Recognition with one hand, when adopting both hands to carry out the video Sign Language Recognition, two kinds of schemes can be arranged, first kind of scheme, can be with colored gloves band at another on hand to distinguish the right-hand man, identifying schemes is identical with singlehanded identification, and at this moment, gesture database is the speech database of the gesture information of corresponding two hands.Another kind of scheme, adopt association method expansion gesture database, make gesture database store the voice messaging of corresponding different another gesture information according to singlehanded gesture information, carry out obtaining gesture information after the video Sign Language Recognition according to one hand, identification module obtains a plurality of voice messagings (showing with language) according to gesture database, selects one of them voice messaging output by the user by CPU.
In this embodiment, gesture database, the user's colour of skin information that prestores and have the finger information that different colours refers to cap and can be stored in the existing memory module of portable terminal.
Fig. 2 is the method flow diagram of realization Sign Language Recognition provided by the invention, and its concrete steps are:
When carrying out the sign language image processing, can adopt " data glove " mode to discern gesture information;
How the voice that transmit in communication process for the other side's portable terminal are prompted to the our mobile terminal user of use, can be text word with speech conversion then according to prior art, be shown to and use our mobile terminal user, this method is a prior art, is not repeated here.
Adopt portable terminal provided by the invention and method, gesture database adopts the TMHMM model, and the CPU of portable terminal adopts the frequency of Pentium three 800MHZ, and the discrimination that obtains is about 91%, and recognition speed is 0.13 a second/speech.
As can be seen, method provided by the invention and portable terminal utilize the camera collection sign language video of portable terminal, through obtaining gesture information after the conversion, according in advance the storage gesture database the gesture information that obtains is converted to voice messaging after, send and the other side's portable terminal communicates.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being made within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1, a kind of portable terminal of realizing Sign Language Recognition is characterized in that, comprise gathering video sign language module, image processing module, gesture database and identification module, wherein,
Gather video sign language module, after being used to gather the sign language image this sign language picture breakdown being continuous some frames, be transferred to image processing module;
Image processing module is used for the sign language image of continuous some frames of receiving is handled, obtain gesture information after, send to identification module;
Identification module is used to call gesture database, and gesture information is converted to voice.
2, portable terminal as claimed in claim 1 is characterized in that, described collection video sign language module, image processing module, gesture database and identification module are controlled by the central processor CPU in the portable terminal.
3, portable terminal as claimed in claim 1 is characterized in that, described image processing module comprises background removal module, palm position judging module and extraction gesture information module, wherein,
The background removal module is used for removing the sign language image background that obtains according to the user's colour of skin information that prestores;
The palm position judging module, be used for from remove sign language image after the background orientation information in one's hands;
Extract the gesture information module, be used for extracting gesture information from the sign language image of removing after the background according to hand orientation information and the finger information that prestores.
4, portable terminal as claimed in claim 3, described gesture database, the user's colour of skin information that prestores and the finger information that prestores all are arranged in the memory of portable terminal.
5, a kind of method that realizes Sign Language Recognition is characterized in that, described method comprises:
Portable terminal is decomposed into continuous some frames with the sign language image of gathering;
Portable terminal is handled the sign language image of continuous some frames, obtains gesture information;
Portable terminal is converted to voice according to default gesture database with gesture information.
6, method as claimed in claim 5, its feature adopts, and described sign language image to continuous some frames is handled, and obtains gesture information and adopts " data glove " mode to carry out, and process is:
The sign language image of described some frames is continuously gone up the sign language image that the band different colours refers to cap for finger;
After the sign language image of described continuous some frames carried out background removal, the palm of removing in the sign language image after the background is carried out ellipse fitting, orientation information in one's hands;
Towards determining to have the finger place relative position that different colours refers to cap, extract gesture information according to hand.
7, method as claimed in claim 6 is characterized in that, described background removal is to remove according to user's colour of skin information of storage in advance;
It is described that to determine to have the finger place relative position that different colours refers to cap be to determine according to the finger information of storage in advance.
8, method as claimed in claim 7 is characterized in that, the user's colour of skin information of described storage in advance and/or the finger information of storage in advance are that the learning process of process portable terminal obtains.
9, method as claimed in claim 6 is characterized in that, the sign language image of described some frames continuously is singlehanded image; Perhaps be the both hands image, wherein hand has the gloves of color.
10, method as claimed in claim 5 is characterized in that, described gesture database adopts HMM model, CHMM model or TMHMM model, and gesture information is converted to text sentence, adopts text sentence-speech conversion function to be converted to voice then;
Described gesture database has been stored the voice messaging of corresponding different another gesture information according to singlehanded gesture information, describedly gesture information is converted to voice also needs to carry out according to the instruction that the user who receives sends;
Perhaps described gesture database is the speech database of the gesture information of corresponding two hands.
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Application publication date: 20091216 |